diff --git a/.changeset/silver-swans-build.md b/.changeset/silver-swans-build.md
new file mode 100644
index 00000000..8d597699
--- /dev/null
+++ b/.changeset/silver-swans-build.md
@@ -0,0 +1,5 @@
+---
+"svelte-eslint-parser": patch
+---
+
+feat: support postcss
diff --git a/src/parser/style-context.ts b/src/parser/style-context.ts
index 3d5daa91..a162e403 100644
--- a/src/parser/style-context.ts
+++ b/src/parser/style-context.ts
@@ -56,6 +56,7 @@ export function parseStyleContext(
   let parseFn: Parser<Root>, sourceAst: Root;
   switch (sourceLang) {
     case "css":
+    case "postcss":
       parseFn = postcss.parse;
       break;
     case "scss":
diff --git a/tests/fixtures/parser/ast/postcss-input.svelte b/tests/fixtures/parser/ast/postcss-input.svelte
new file mode 100644
index 00000000..a4d2bf53
--- /dev/null
+++ b/tests/fixtures/parser/ast/postcss-input.svelte
@@ -0,0 +1,6 @@
+<style lang="postcss">
+  body {
+    colour: white;
+    background-colour: grey;
+  }
+</style>
diff --git a/tests/fixtures/parser/ast/postcss-output.json b/tests/fixtures/parser/ast/postcss-output.json
new file mode 100644
index 00000000..48b45387
--- /dev/null
+++ b/tests/fixtures/parser/ast/postcss-output.json
@@ -0,0 +1,405 @@
+{
+  "type": "Program",
+  "body": [
+    {
+      "type": "SvelteStyleElement",
+      "name": {
+        "type": "SvelteName",
+        "name": "style",
+        "range": [
+          1,
+          6
+        ],
+        "loc": {
+          "start": {
+            "line": 1,
+            "column": 1
+          },
+          "end": {
+            "line": 1,
+            "column": 6
+          }
+        }
+      },
+      "startTag": {
+        "type": "SvelteStartTag",
+        "attributes": [
+          {
+            "type": "SvelteAttribute",
+            "key": {
+              "type": "SvelteName",
+              "name": "lang",
+              "range": [
+                7,
+                11
+              ],
+              "loc": {
+                "start": {
+                  "line": 1,
+                  "column": 7
+                },
+                "end": {
+                  "line": 1,
+                  "column": 11
+                }
+              }
+            },
+            "boolean": false,
+            "value": [
+              {
+                "type": "SvelteLiteral",
+                "value": "postcss",
+                "range": [
+                  13,
+                  20
+                ],
+                "loc": {
+                  "start": {
+                    "line": 1,
+                    "column": 13
+                  },
+                  "end": {
+                    "line": 1,
+                    "column": 20
+                  }
+                }
+              }
+            ],
+            "range": [
+              7,
+              21
+            ],
+            "loc": {
+              "start": {
+                "line": 1,
+                "column": 7
+              },
+              "end": {
+                "line": 1,
+                "column": 21
+              }
+            }
+          }
+        ],
+        "selfClosing": false,
+        "range": [
+          0,
+          22
+        ],
+        "loc": {
+          "start": {
+            "line": 1,
+            "column": 0
+          },
+          "end": {
+            "line": 1,
+            "column": 22
+          }
+        }
+      },
+      "children": [
+        {
+          "type": "SvelteText",
+          "value": "\n  body {\n    colour: white;\n    background-colour: grey;\n  }\n",
+          "range": [
+            22,
+            84
+          ],
+          "loc": {
+            "start": {
+              "line": 1,
+              "column": 22
+            },
+            "end": {
+              "line": 6,
+              "column": 0
+            }
+          }
+        }
+      ],
+      "endTag": {
+        "type": "SvelteEndTag",
+        "range": [
+          84,
+          92
+        ],
+        "loc": {
+          "start": {
+            "line": 6,
+            "column": 0
+          },
+          "end": {
+            "line": 6,
+            "column": 8
+          }
+        }
+      },
+      "range": [
+        0,
+        92
+      ],
+      "loc": {
+        "start": {
+          "line": 1,
+          "column": 0
+        },
+        "end": {
+          "line": 6,
+          "column": 8
+        }
+      }
+    }
+  ],
+  "sourceType": "module",
+  "comments": [],
+  "tokens": [
+    {
+      "type": "Punctuator",
+      "value": "<",
+      "range": [
+        0,
+        1
+      ],
+      "loc": {
+        "start": {
+          "line": 1,
+          "column": 0
+        },
+        "end": {
+          "line": 1,
+          "column": 1
+        }
+      }
+    },
+    {
+      "type": "HTMLIdentifier",
+      "value": "style",
+      "range": [
+        1,
+        6
+      ],
+      "loc": {
+        "start": {
+          "line": 1,
+          "column": 1
+        },
+        "end": {
+          "line": 1,
+          "column": 6
+        }
+      }
+    },
+    {
+      "type": "HTMLIdentifier",
+      "value": "lang",
+      "range": [
+        7,
+        11
+      ],
+      "loc": {
+        "start": {
+          "line": 1,
+          "column": 7
+        },
+        "end": {
+          "line": 1,
+          "column": 11
+        }
+      }
+    },
+    {
+      "type": "Punctuator",
+      "value": "=",
+      "range": [
+        11,
+        12
+      ],
+      "loc": {
+        "start": {
+          "line": 1,
+          "column": 11
+        },
+        "end": {
+          "line": 1,
+          "column": 12
+        }
+      }
+    },
+    {
+      "type": "Punctuator",
+      "value": "\"",
+      "range": [
+        12,
+        13
+      ],
+      "loc": {
+        "start": {
+          "line": 1,
+          "column": 12
+        },
+        "end": {
+          "line": 1,
+          "column": 13
+        }
+      }
+    },
+    {
+      "type": "HTMLText",
+      "value": "postcss",
+      "range": [
+        13,
+        20
+      ],
+      "loc": {
+        "start": {
+          "line": 1,
+          "column": 13
+        },
+        "end": {
+          "line": 1,
+          "column": 20
+        }
+      }
+    },
+    {
+      "type": "Punctuator",
+      "value": "\"",
+      "range": [
+        20,
+        21
+      ],
+      "loc": {
+        "start": {
+          "line": 1,
+          "column": 20
+        },
+        "end": {
+          "line": 1,
+          "column": 21
+        }
+      }
+    },
+    {
+      "type": "Punctuator",
+      "value": ">",
+      "range": [
+        21,
+        22
+      ],
+      "loc": {
+        "start": {
+          "line": 1,
+          "column": 21
+        },
+        "end": {
+          "line": 1,
+          "column": 22
+        }
+      }
+    },
+    {
+      "type": "HTMLText",
+      "value": "\n  body {\n    colour: white;\n    background-colour: grey;\n  }\n",
+      "range": [
+        22,
+        84
+      ],
+      "loc": {
+        "start": {
+          "line": 1,
+          "column": 22
+        },
+        "end": {
+          "line": 6,
+          "column": 0
+        }
+      }
+    },
+    {
+      "type": "Punctuator",
+      "value": "<",
+      "range": [
+        84,
+        85
+      ],
+      "loc": {
+        "start": {
+          "line": 6,
+          "column": 0
+        },
+        "end": {
+          "line": 6,
+          "column": 1
+        }
+      }
+    },
+    {
+      "type": "Punctuator",
+      "value": "/",
+      "range": [
+        85,
+        86
+      ],
+      "loc": {
+        "start": {
+          "line": 6,
+          "column": 1
+        },
+        "end": {
+          "line": 6,
+          "column": 2
+        }
+      }
+    },
+    {
+      "type": "HTMLIdentifier",
+      "value": "style",
+      "range": [
+        86,
+        91
+      ],
+      "loc": {
+        "start": {
+          "line": 6,
+          "column": 2
+        },
+        "end": {
+          "line": 6,
+          "column": 7
+        }
+      }
+    },
+    {
+      "type": "Punctuator",
+      "value": ">",
+      "range": [
+        91,
+        92
+      ],
+      "loc": {
+        "start": {
+          "line": 6,
+          "column": 7
+        },
+        "end": {
+          "line": 6,
+          "column": 8
+        }
+      }
+    }
+  ],
+  "range": [
+    0,
+    93
+  ],
+  "loc": {
+    "start": {
+      "line": 1,
+      "column": 0
+    },
+    "end": {
+      "line": 7,
+      "column": 0
+    }
+  }
+}
\ No newline at end of file
diff --git a/tests/fixtures/parser/ast/postcss-scope-output.json b/tests/fixtures/parser/ast/postcss-scope-output.json
new file mode 100644
index 00000000..d392ca4b
--- /dev/null
+++ b/tests/fixtures/parser/ast/postcss-scope-output.json
@@ -0,0 +1,34 @@
+{
+  "type": "global",
+  "variables": [
+    {
+      "name": "$$slots",
+      "identifiers": [],
+      "defs": [],
+      "references": []
+    },
+    {
+      "name": "$$props",
+      "identifiers": [],
+      "defs": [],
+      "references": []
+    },
+    {
+      "name": "$$restProps",
+      "identifiers": [],
+      "defs": [],
+      "references": []
+    }
+  ],
+  "references": [],
+  "childScopes": [
+    {
+      "type": "module",
+      "variables": [],
+      "references": [],
+      "childScopes": [],
+      "through": []
+    }
+  ],
+  "through": []
+}
\ No newline at end of file
diff --git a/tests/fixtures/parser/ast/sass-output copy.json b/tests/fixtures/parser/ast/sass-output copy.json
new file mode 100644
index 00000000..21f7e67c
--- /dev/null
+++ b/tests/fixtures/parser/ast/sass-output copy.json	
@@ -0,0 +1,405 @@
+{
+  "type": "Program",
+  "body": [
+    {
+      "type": "SvelteStyleElement",
+      "name": {
+        "type": "SvelteName",
+        "name": "style",
+        "range": [
+          1,
+          6
+        ],
+        "loc": {
+          "start": {
+            "line": 1,
+            "column": 1
+          },
+          "end": {
+            "line": 1,
+            "column": 6
+          }
+        }
+      },
+      "startTag": {
+        "type": "SvelteStartTag",
+        "attributes": [
+          {
+            "type": "SvelteAttribute",
+            "key": {
+              "type": "SvelteName",
+              "name": "lang",
+              "range": [
+                7,
+                11
+              ],
+              "loc": {
+                "start": {
+                  "line": 1,
+                  "column": 7
+                },
+                "end": {
+                  "line": 1,
+                  "column": 11
+                }
+              }
+            },
+            "boolean": false,
+            "value": [
+              {
+                "type": "SvelteLiteral",
+                "value": "sass",
+                "range": [
+                  13,
+                  17
+                ],
+                "loc": {
+                  "start": {
+                    "line": 1,
+                    "column": 13
+                  },
+                  "end": {
+                    "line": 1,
+                    "column": 17
+                  }
+                }
+              }
+            ],
+            "range": [
+              7,
+              18
+            ],
+            "loc": {
+              "start": {
+                "line": 1,
+                "column": 7
+              },
+              "end": {
+                "line": 1,
+                "column": 18
+              }
+            }
+          }
+        ],
+        "selfClosing": false,
+        "range": [
+          0,
+          19
+        ],
+        "loc": {
+          "start": {
+            "line": 1,
+            "column": 0
+          },
+          "end": {
+            "line": 1,
+            "column": 19
+          }
+        }
+      },
+      "children": [
+        {
+          "type": "SvelteText",
+          "value": "\n$font-stack:    Helvetica, sans-serif\n$primary-color: #333\n\nbody\n    font: 100% $font-stack\n    color: $primary-color\n",
+          "range": [
+            19,
+            138
+          ],
+          "loc": {
+            "start": {
+              "line": 1,
+              "column": 19
+            },
+            "end": {
+              "line": 8,
+              "column": 0
+            }
+          }
+        }
+      ],
+      "endTag": {
+        "type": "SvelteEndTag",
+        "range": [
+          138,
+          146
+        ],
+        "loc": {
+          "start": {
+            "line": 8,
+            "column": 0
+          },
+          "end": {
+            "line": 8,
+            "column": 8
+          }
+        }
+      },
+      "range": [
+        0,
+        146
+      ],
+      "loc": {
+        "start": {
+          "line": 1,
+          "column": 0
+        },
+        "end": {
+          "line": 8,
+          "column": 8
+        }
+      }
+    }
+  ],
+  "sourceType": "module",
+  "comments": [],
+  "tokens": [
+    {
+      "type": "Punctuator",
+      "value": "<",
+      "range": [
+        0,
+        1
+      ],
+      "loc": {
+        "start": {
+          "line": 1,
+          "column": 0
+        },
+        "end": {
+          "line": 1,
+          "column": 1
+        }
+      }
+    },
+    {
+      "type": "HTMLIdentifier",
+      "value": "style",
+      "range": [
+        1,
+        6
+      ],
+      "loc": {
+        "start": {
+          "line": 1,
+          "column": 1
+        },
+        "end": {
+          "line": 1,
+          "column": 6
+        }
+      }
+    },
+    {
+      "type": "HTMLIdentifier",
+      "value": "lang",
+      "range": [
+        7,
+        11
+      ],
+      "loc": {
+        "start": {
+          "line": 1,
+          "column": 7
+        },
+        "end": {
+          "line": 1,
+          "column": 11
+        }
+      }
+    },
+    {
+      "type": "Punctuator",
+      "value": "=",
+      "range": [
+        11,
+        12
+      ],
+      "loc": {
+        "start": {
+          "line": 1,
+          "column": 11
+        },
+        "end": {
+          "line": 1,
+          "column": 12
+        }
+      }
+    },
+    {
+      "type": "Punctuator",
+      "value": "\"",
+      "range": [
+        12,
+        13
+      ],
+      "loc": {
+        "start": {
+          "line": 1,
+          "column": 12
+        },
+        "end": {
+          "line": 1,
+          "column": 13
+        }
+      }
+    },
+    {
+      "type": "HTMLText",
+      "value": "sass",
+      "range": [
+        13,
+        17
+      ],
+      "loc": {
+        "start": {
+          "line": 1,
+          "column": 13
+        },
+        "end": {
+          "line": 1,
+          "column": 17
+        }
+      }
+    },
+    {
+      "type": "Punctuator",
+      "value": "\"",
+      "range": [
+        17,
+        18
+      ],
+      "loc": {
+        "start": {
+          "line": 1,
+          "column": 17
+        },
+        "end": {
+          "line": 1,
+          "column": 18
+        }
+      }
+    },
+    {
+      "type": "Punctuator",
+      "value": ">",
+      "range": [
+        18,
+        19
+      ],
+      "loc": {
+        "start": {
+          "line": 1,
+          "column": 18
+        },
+        "end": {
+          "line": 1,
+          "column": 19
+        }
+      }
+    },
+    {
+      "type": "HTMLText",
+      "value": "\n$font-stack:    Helvetica, sans-serif\n$primary-color: #333\n\nbody\n    font: 100% $font-stack\n    color: $primary-color\n",
+      "range": [
+        19,
+        138
+      ],
+      "loc": {
+        "start": {
+          "line": 1,
+          "column": 19
+        },
+        "end": {
+          "line": 8,
+          "column": 0
+        }
+      }
+    },
+    {
+      "type": "Punctuator",
+      "value": "<",
+      "range": [
+        138,
+        139
+      ],
+      "loc": {
+        "start": {
+          "line": 8,
+          "column": 0
+        },
+        "end": {
+          "line": 8,
+          "column": 1
+        }
+      }
+    },
+    {
+      "type": "Punctuator",
+      "value": "/",
+      "range": [
+        139,
+        140
+      ],
+      "loc": {
+        "start": {
+          "line": 8,
+          "column": 1
+        },
+        "end": {
+          "line": 8,
+          "column": 2
+        }
+      }
+    },
+    {
+      "type": "HTMLIdentifier",
+      "value": "style",
+      "range": [
+        140,
+        145
+      ],
+      "loc": {
+        "start": {
+          "line": 8,
+          "column": 2
+        },
+        "end": {
+          "line": 8,
+          "column": 7
+        }
+      }
+    },
+    {
+      "type": "Punctuator",
+      "value": ">",
+      "range": [
+        145,
+        146
+      ],
+      "loc": {
+        "start": {
+          "line": 8,
+          "column": 7
+        },
+        "end": {
+          "line": 8,
+          "column": 8
+        }
+      }
+    }
+  ],
+  "range": [
+    0,
+    146
+  ],
+  "loc": {
+    "start": {
+      "line": 1,
+      "column": 0
+    },
+    "end": {
+      "line": 8,
+      "column": 8
+    }
+  }
+}
\ No newline at end of file
diff --git a/tests/fixtures/parser/style-context/simple-postcss-input.svelte b/tests/fixtures/parser/style-context/simple-postcss-input.svelte
new file mode 100644
index 00000000..f6d0079a
--- /dev/null
+++ b/tests/fixtures/parser/style-context/simple-postcss-input.svelte
@@ -0,0 +1,11 @@
+<div class="container">
+  <div class="div-class">Hello</div>
+  <span class="span-class">World!</span>
+</div>
+
+<style lang="postcss">
+  body {
+    colour: white;
+    background-colour: grey;
+  }
+</style>
diff --git a/tests/fixtures/parser/style-context/simple-postcss-output.json b/tests/fixtures/parser/style-context/simple-postcss-output.json
new file mode 100644
index 00000000..2c5ad71d
--- /dev/null
+++ b/tests/fixtures/parser/style-context/simple-postcss-output.json
@@ -0,0 +1,105 @@
+{
+  "status": "success",
+  "sourceLang": "postcss",
+  "sourceAst": {
+    "raws": {
+      "semicolon": false,
+      "after": "\n"
+    },
+    "type": "root",
+    "nodes": [
+      {
+        "raws": {
+          "before": "\n  ",
+          "between": " ",
+          "semicolon": true,
+          "after": "\n  "
+        },
+        "type": "rule",
+        "nodes": [
+          {
+            "raws": {
+              "before": "\n    ",
+              "between": ": "
+            },
+            "type": "decl",
+            "prop": "colour",
+            "value": "white",
+            "source": {
+              "end": {
+                "line": 8,
+                "column": 18,
+                "offset": 160
+              },
+              "inputId": 0,
+              "start": {
+                "line": 8,
+                "column": 5,
+                "offset": 146
+              }
+            }
+          },
+          {
+            "raws": {
+              "before": "\n    ",
+              "between": ": "
+            },
+            "type": "decl",
+            "prop": "background-colour",
+            "value": "grey",
+            "source": {
+              "end": {
+                "line": 9,
+                "column": 28,
+                "offset": 189
+              },
+              "inputId": 0,
+              "start": {
+                "line": 9,
+                "column": 5,
+                "offset": 165
+              }
+            }
+          }
+        ],
+        "selector": "body",
+        "source": {
+          "end": {
+            "line": 10,
+            "column": 3,
+            "offset": 193
+          },
+          "inputId": 0,
+          "start": {
+            "line": 7,
+            "column": 3,
+            "offset": 135
+          }
+        },
+        "lastEach": 1,
+        "indexes": {}
+      }
+    ],
+    "source": {
+      "end": {
+        "line": 11,
+        "column": 1,
+        "offset": 194
+      },
+      "inputId": 0,
+      "start": {
+        "line": 6,
+        "column": 23,
+        "offset": 132
+      }
+    },
+    "lastEach": 1,
+    "indexes": {},
+    "inputs": [
+      {
+        "hasBOM": false,
+        "css": "\n  body {\n    colour: white;\n    background-colour: grey;\n  }\n"
+      }
+    ]
+  }
+}
diff --git a/tests/fixtures/parser/style-location-converter/simple-postcss-input.svelte b/tests/fixtures/parser/style-location-converter/simple-postcss-input.svelte
new file mode 100644
index 00000000..9b5035f9
--- /dev/null
+++ b/tests/fixtures/parser/style-location-converter/simple-postcss-input.svelte
@@ -0,0 +1,12 @@
+<div class="container">
+  <div class="div-class">Hello</div>
+
+  <span class="span-class">World!</span>
+</div>
+
+<style lang="postcss">
+  body {
+    colour: white;
+    background-colour: grey;
+  }
+</style>
diff --git a/tests/fixtures/parser/style-location-converter/simple-postcss-output.json b/tests/fixtures/parser/style-location-converter/simple-postcss-output.json
new file mode 100644
index 00000000..3b37803a
--- /dev/null
+++ b/tests/fixtures/parser/style-location-converter/simple-postcss-output.json
@@ -0,0 +1,66 @@
+[
+  [
+    {
+      "start": {
+        "line": 7,
+        "column": 22
+      },
+      "end": {
+        "line": 12,
+        "column": 1
+      }
+    },
+    [
+      133,
+      196
+    ]
+  ],
+  [
+    {
+      "start": {
+        "line": 8,
+        "column": 2
+      },
+      "end": {
+        "line": 11,
+        "column": 3
+      }
+    },
+    [
+      136,
+      195
+    ]
+  ],
+  [
+    {
+      "start": {
+        "line": 9,
+        "column": 4
+      },
+      "end": {
+        "line": 9,
+        "column": 18
+      }
+    },
+    [
+      147,
+      162
+    ]
+  ],
+  [
+    {
+      "start": {
+        "line": 10,
+        "column": 4
+      },
+      "end": {
+        "line": 10,
+        "column": 28
+      }
+    },
+    [
+      166,
+      191
+    ]
+  ]
+]