diff --git a/release_notes.md b/release_notes.md
index 1ef033e67..f98af024c 100644
--- a/release_notes.md
+++ b/release_notes.md
@@ -1,4 +1,5 @@
 ###In Development
+  - [#188](https://github.com/Mehdik/Humanizer/pull/188): Added Spanish ToOrdinalWords translations
   - [#166](https://github.com/MehdiK/Humanizer/pull/166): Added Dutch (NL) Number to words and ordinals
   
 [Commits](https://github.com/MehdiK/Humanizer/compare/v1.21.15...master)
diff --git a/src/Humanizer.Tests/Localisation/es/NumberToWordsTests.cs b/src/Humanizer.Tests/Localisation/es/NumberToWordsTests.cs
index 017dcad73..2a77b1a8a 100644
--- a/src/Humanizer.Tests/Localisation/es/NumberToWordsTests.cs
+++ b/src/Humanizer.Tests/Localisation/es/NumberToWordsTests.cs
@@ -47,5 +47,16 @@ public void ToWordsSpanish(int number, string expected)
         {
             Assert.Equal(expected, number.ToWords());
         }
+
+        [Theory]
+        [InlineData(1, "primero", null)]
+        [InlineData(2, "segundo", GrammaticalGender.Masculine)]
+        [InlineData(2, "segunda", GrammaticalGender.Feminine)]
+        [InlineData(2, "segundo", GrammaticalGender.Neuter)]
+        [InlineData(11, "once", null)]
+        public void ToOrdinalWordsSpanish(int number, string words, GrammaticalGender gender)
+        {
+            Assert.Equal(words, number.ToOrdinalWords(gender));
+        }
     }
-}
+}
\ No newline at end of file
diff --git a/src/Humanizer/Localisation/NumberToWords/SpanishNumberToWordsConverter.cs b/src/Humanizer/Localisation/NumberToWords/SpanishNumberToWordsConverter.cs
index bed48c1d8..b3880e6bb 100644
--- a/src/Humanizer/Localisation/NumberToWords/SpanishNumberToWordsConverter.cs
+++ b/src/Humanizer/Localisation/NumberToWords/SpanishNumberToWordsConverter.cs
@@ -9,6 +9,20 @@ internal class SpanishNumberToWordsConverter : DefaultNumberToWordsConverter
         private static readonly string[] UnitsMap = { "cero", "uno", "dos", "tres", "cuatro", "cinco", "seis", "siete", "ocho", "nueve", "diez", "once", "doce", "trece", "catorce", "quince", "dieciséis", "diecisiete", "dieciocho", "diecinueve" };
         private static readonly string[] TensMap = { "cero", "diez", "veinte", "treinta", "cuarenta", "cincuenta", "sesenta", "setenta", "ochenta", "noventa" };
 
+        private static readonly Dictionary<int, string> Ordinals = new Dictionary<int, string>
+        {
+            {1, "primero"},
+            {2, "segundo"},
+            {3, "tercero"},
+            {4, "quarto"},
+            {5, "quinto"},
+            {6, "sexto"},
+            {7, "séptimo"},
+            {8, "octavo"},
+            {9, "noveno"},
+            {10, "décimo"}
+        };
+
         public override string Convert(int number)
         {
             if (number == 0)
@@ -21,34 +35,34 @@ public override string Convert(int number)
 
             if ((number / 1000000000) > 0)
             {
-                parts.Add(number/1000000000 == 1
+                parts.Add(number / 1000000000 == 1
                     ? string.Format("mil millones")
-                    : string.Format("{0} mil millones", Convert(number/1000000000)));
+                    : string.Format("{0} mil millones", Convert(number / 1000000000)));
 
                 number %= 1000000000;
             }
 
             if ((number / 1000000) > 0)
             {
-                parts.Add(number/1000000 == 1
+                parts.Add(number / 1000000 == 1
                     ? string.Format("millón")
-                    : string.Format("{0} millones", Convert(number/1000000)));
+                    : string.Format("{0} millones", Convert(number / 1000000)));
 
                 number %= 1000000;
             }
 
             if ((number / 1000) > 0)
             {
-                parts.Add(number/1000 == 1
+                parts.Add(number / 1000 == 1
                     ? string.Format("mil")
-                    : string.Format("{0} mil", Convert(number/1000)));
+                    : string.Format("{0} mil", Convert(number / 1000)));
 
                 number %= 1000;
             }
 
             if ((number / 100) > 0)
             {
-                parts.Add(number == 100 ? string.Format("cien") : HundredsMap[(number/100)]);
+                parts.Add(number == 100 ? string.Format("cien") : HundredsMap[(number / 100)]);
                 number %= 100;
             }
 
@@ -56,8 +70,7 @@ public override string Convert(int number)
             {
                 if (number < 20)
                     parts.Add(UnitsMap[number]);
-                else if (number > 20 && number < 30)
-                {
+                else if (number > 20 && number < 30) {
                     var lastPart = TensMap[number / 10];
                     if ((number % 10) > 0)
                         lastPart += string.Format(" {0}", UnitsMap[number % 10]);
@@ -77,9 +90,15 @@ public override string Convert(int number)
             return string.Join(" ", parts.ToArray());
         }
 
-        public override string ConvertToOrdinal(int number)
+        public override string ConvertToOrdinal(int number, GrammaticalGender gender = GrammaticalGender.Masculine)
         {
-            throw new NotImplementedException();
+            string towords;
+            if (!Ordinals.TryGetValue(number, out towords))
+                towords = Convert(number);
+            if (gender == GrammaticalGender.Feminine)
+                towords = towords.TrimEnd('o') + "a";
+
+            return towords;
         }
     }
 }
\ No newline at end of file