diff --git a/.changeset/itchy-papayas-push.md b/.changeset/itchy-papayas-push.md
new file mode 100644
index 0000000000..20b1c878f8
--- /dev/null
+++ b/.changeset/itchy-papayas-push.md
@@ -0,0 +1,5 @@
+---
+"viem": patch
+---
+
+Added CoinEx Mainnet.
diff --git a/src/chains/definitions/coinex.ts b/src/chains/definitions/coinex.ts
new file mode 100644
index 0000000000..09c1f33fdd
--- /dev/null
+++ b/src/chains/definitions/coinex.ts
@@ -0,0 +1,19 @@
+import { defineChain } from '../../utils/chain/defineChain.js'
+
+export const coinex = /*#__PURE__*/ defineChain({
+  id: 52,
+  name: 'CoinEx Mainnet',
+  nativeCurrency: { name: 'cet', symbol: 'cet', decimals: 18 },
+  rpcUrls: {
+    default: {
+      http: ['https://rpc.coinex.net'],
+    },
+  },
+  blockExplorers: {
+    default: {
+      name: 'CoinEx Explorer',
+      url: 'https://www.coinex.net',
+    },
+  },
+  testnet: false,
+})
diff --git a/src/chains/index.ts b/src/chains/index.ts
index 6ac3591a49..cfdbdc6223 100644
--- a/src/chains/index.ts
+++ b/src/chains/index.ts
@@ -79,6 +79,7 @@ export { chang } from './definitions/chang.js'
 export { chiliz } from './definitions/chiliz.js'
 export { chips } from './definitions/chips.js'
 export { classic } from './definitions/classic.js'
+export { coinex } from './definitions/coinex.js'
 export { confluxESpace } from './definitions/confluxESpace.js'
 export { confluxESpaceTestnet } from './definitions/confluxESpaceTestnet.js'
 export { coreDao } from './definitions/coreDao.js'