diff --git a/src/rules/typeColonSpacing/evaluateVariables.js b/src/rules/typeColonSpacing/evaluateVariables.js
new file mode 100644
index 00000000..2ed99ec0
--- /dev/null
+++ b/src/rules/typeColonSpacing/evaluateVariables.js
@@ -0,0 +1,23 @@
+import _ from 'lodash';
+import {getParameterName, quoteName} from '../../utilities';
+
+export default (context, report) => {
+  const sourceCode = context.getSourceCode();
+
+  return (node) => {
+    const declarations = _.get(node, 'declarations', []);
+
+    _.forEach(declarations, (leaf) => {
+      const typeAnnotation = _.get(leaf, 'id.typeAnnotation');
+
+      if (typeAnnotation) {
+        report({
+          colon: sourceCode.getFirstToken(typeAnnotation),
+          name: quoteName(getParameterName(leaf, context)),
+          node: leaf,
+          type: node.kind + ' type annotation'
+        });
+      }
+    });
+  };
+};
diff --git a/src/rules/typeColonSpacing/index.js b/src/rules/typeColonSpacing/index.js
index 2bfa3c2d..53d0d556 100644
--- a/src/rules/typeColonSpacing/index.js
+++ b/src/rules/typeColonSpacing/index.js
@@ -4,6 +4,7 @@ import evaluateObjectTypeProperty from './evaluateObjectTypeProperty';
 import evaluateTypeCastExpression from './evaluateTypeCastExpression';
 import evaluateTypical from './evaluateTypical';
 import evaluateFunctions from './evaluateFunctions';
+import evaluateVariables from './evaluateVariables';
 
 export default (direction, context, options) => {
   const report = reporter(direction, context, options);
@@ -13,6 +14,7 @@ export default (direction, context, options) => {
     ClassProperty: evaluateTypical(context, report, 'class property'),
     ObjectTypeIndexer: evaluateObjectTypeIndexer(context, report),
     ObjectTypeProperty: evaluateObjectTypeProperty(context, report),
-    TypeCastExpression: evaluateTypeCastExpression(context, report)
+    TypeCastExpression: evaluateTypeCastExpression(context, report),
+    VariableDeclaration: evaluateVariables(context, report)
   };
 };
diff --git a/tests/rules/assertions/spaceAfterTypeColon.js b/tests/rules/assertions/spaceAfterTypeColon.js
index 6b5be901..0ee9ed92 100644
--- a/tests/rules/assertions/spaceAfterTypeColon.js
+++ b/tests/rules/assertions/spaceAfterTypeColon.js
@@ -1065,6 +1065,43 @@ const TYPE_CAST_EXPRESSIONS = {
   ]
 };
 
+const VARIABLE_EXPRESSIONS = {
+  invalid: [
+    {
+      code: 'const x:number = 7;',
+      errors: [{message: 'There must be a space after const type annotation colon.'}],
+      options: ['always'],
+      output: 'const x: number = 7;'
+    },
+    {
+      code: 'let x:number = 42;',
+      errors: [{message: 'There must be a space after let type annotation colon.'}],
+      options: ['always'],
+      output: 'let x: number = 42;'
+    },
+    {
+      code: 'var x:number = 42;',
+      errors: [{message: 'There must be a space after var type annotation colon.'}],
+      options: ['always'],
+      output: 'var x: number = 42;'
+    }
+  ],
+  valid: [
+    {
+      code: 'const x: number = 7;',
+      options: ['always']
+    },
+    {
+      code: 'let x: number = 42;',
+      options: ['always']
+    },
+    {
+      code: 'var x: number = 42;',
+      options: ['always']
+    }
+  ]
+};
+
 const ALL = [
   ARROW_FUNCTION_PARAMS,
   ARROW_FUNCTION_RETURN,
@@ -1074,7 +1111,8 @@ const ALL = [
   CLASS_PROPERTIES,
   OBJECT_TYPE_PROPERTIES,
   OBJECT_TYPE_INDEXERS,
-  TYPE_CAST_EXPRESSIONS
+  TYPE_CAST_EXPRESSIONS,
+  VARIABLE_EXPRESSIONS
 ];
 
 const MISCONFIGURED = [
diff --git a/tests/rules/assertions/spaceBeforeTypeColon.js b/tests/rules/assertions/spaceBeforeTypeColon.js
index b2deb798..82967c32 100644
--- a/tests/rules/assertions/spaceBeforeTypeColon.js
+++ b/tests/rules/assertions/spaceBeforeTypeColon.js
@@ -872,6 +872,43 @@ const TYPE_CAST_EXPRESSIONS = {
   ]
 };
 
+const VARIABLE_EXPRESSIONS = {
+  invalid: [
+    {
+      code: 'const x:number = 7;',
+      errors: [{message: 'There must be a space before const type annotation colon.'}],
+      options: ['always'],
+      output: 'const x :number = 7;'
+    },
+    {
+      code: 'let x:number = 42;',
+      errors: [{message: 'There must be a space before let type annotation colon.'}],
+      options: ['always'],
+      output: 'let x :number = 42;'
+    },
+    {
+      code: 'var x:number = 42;',
+      errors: [{message: 'There must be a space before var type annotation colon.'}],
+      options: ['always'],
+      output: 'var x :number = 42;'
+    }
+  ],
+  valid: [
+    {
+      code: 'const x :number = 7;',
+      options: ['always']
+    },
+    {
+      code: 'let x :number = 42;',
+      options: ['always']
+    },
+    {
+      code: 'var x :number = 42;',
+      options: ['always']
+    }
+  ]
+};
+
 const ALL = [
   ARROW_FUNCTION_PARAMS,
   ARROW_FUNCTION_RETURN,
@@ -881,7 +918,8 @@ const ALL = [
   CLASS_PROPERTIES,
   OBJECT_TYPE_PROPERTIES,
   OBJECT_TYPE_INDEXERS,
-  TYPE_CAST_EXPRESSIONS
+  TYPE_CAST_EXPRESSIONS,
+  VARIABLE_EXPRESSIONS
 ];
 
 const MISCONFIGURED = [