diff --git a/src/ng/directive/ngOptions.js b/src/ng/directive/ngOptions.js
index f6ec5f227c0b..6f05f9abdd79 100644
--- a/src/ng/directive/ngOptions.js
+++ b/src/ng/directive/ngOptions.js
@@ -94,15 +94,20 @@ var ngOptionsMinErr = minErr('ngOptions');
  *     * `label` **`for`** `value` **`in`** `array`
  *     * `select` **`as`** `label` **`for`** `value` **`in`** `array`
  *     * `label` **`group by`** `group` **`for`** `value` **`in`** `array`
+ *     * `label` **`disable by`** `disable` **`for`** `value` **`in`** `array`
  *     * `label` **`group by`** `group` **`for`** `value` **`in`** `array` **`track by`** `trackexpr`
+ *     * `label` **`disable by`** `disable` **`for`** `value` **`in`** `array` **`track by`** `trackexpr`
  *     * `label` **`for`** `value` **`in`** `array` | orderBy:`orderexpr` **`track by`** `trackexpr`
  *        (for including a filter with `track by`)
  *   * for object data sources:
  *     * `label` **`for (`**`key` **`,`** `value`**`) in`** `object`
  *     * `select` **`as`** `label` **`for (`**`key` **`,`** `value`**`) in`** `object`
  *     * `label` **`group by`** `group` **`for (`**`key`**`,`** `value`**`) in`** `object`
+ *     * `label` **`disable by`** `disable` **`for (`**`key`**`,`** `value`**`) in`** `object`
  *     * `select` **`as`** `label` **`group by`** `group`
  *         **`for` `(`**`key`**`,`** `value`**`) in`** `object`
+ *     * `select` **`as`** `label` **`disable by`** `disable`
+ *         **`for` `(`**`key`**`,`** `value`**`) in`** `object`
  *
  * Where:
  *
@@ -116,6 +121,8 @@ var ngOptionsMinErr = minErr('ngOptions');
  *      element. If not specified, `select` expression will default to `value`.
  *   * `group`: The result of this expression will be used to group options using the `<optgroup>`
  *      DOM element.
+ *   * `disable`: The result of this expression will be used to disable the rendered `<option>`
+ *      element. Return `true` to disable.
  *   * `trackexpr`: Used when working with an array of objects. The result of this expression will be
  *      used to identify the objects in the array. The `trackexpr` will most likely refer to the
  *     `value` variable (e.g. `value.propertyName`). With this the selection is preserved
@@ -129,10 +136,10 @@ var ngOptionsMinErr = minErr('ngOptions');
           .controller('ExampleController', ['$scope', function($scope) {
             $scope.colors = [
               {name:'black', shade:'dark'},
-              {name:'white', shade:'light'},
+              {name:'white', shade:'light', notAnOption: true},
               {name:'red', shade:'dark'},
-              {name:'blue', shade:'dark'},
-              {name:'yellow', shade:'light'}
+              {name:'blue', shade:'dark', notAnOption: true},
+              {name:'yellow', shade:'light', notAnOption: false}
             ];
             $scope.myColor = $scope.colors[2]; // red
           }]);
@@ -141,6 +148,7 @@ var ngOptionsMinErr = minErr('ngOptions');
           <ul>
             <li ng-repeat="color in colors">
               Name: <input ng-model="color.name">
+              <input type="checkbox" ng-model="color.notAnOption"> Disabled?
               [<a href ng-click="colors.splice($index, 1)">X</a>]
             </li>
             <li>
@@ -162,6 +170,12 @@ var ngOptionsMinErr = minErr('ngOptions');
           <select ng-model="myColor" ng-options="color.name group by color.shade for color in colors">
           </select><br/>
 
+          Color grouped by shade, with some disabled:
+          <select ng-model="myColor"
+                  ng-options="color.name group by color.shade disable by color.notAnOption for color in colors">
+          </select><br/>
+
+
 
           Select <a href ng-click="myColor = { name:'not in list', shade: 'other' }">bogus</a>.<br>
           <hr/>
@@ -186,16 +200,17 @@ var ngOptionsMinErr = minErr('ngOptions');
  */
 
 // jshint maxlen: false
-                         //000011111111110000000000022222222220000000000000000000003333333333000000000000004444444444444440000000005555555555555550000000666666666666666000000000000000777777777700000000000000000008888888888
-var NG_OPTIONS_REGEXP = /^\s*([\s\S]+?)(?:\s+as\s+([\s\S]+?))?(?:\s+group\s+by\s+([\s\S]+?))?\s+for\s+(?:([\$\w][\$\w]*)|(?:\(\s*([\$\w][\$\w]*)\s*,\s*([\$\w][\$\w]*)\s*\)))\s+in\s+([\s\S]+?)(?:\s+track\s+by\s+([\s\S]+?))?$/;
+//                     //000011111111110000000000022222222220000000000000000000003333333333000000000000000000000004444444444400000000000005555555555555550000000006666666666666660000000777777777777777000000000000000888888888800000000000000000009999999999
+var NG_OPTIONS_REGEXP = /^\s*([\s\S]+?)(?:\s+as\s+([\s\S]+?))?(?:\s+group\s+by\s+([\s\S]+?))?(?:\s+disable\s+by\s+([\s\S]+?))?\s+for\s+(?:([\$\w][\$\w]*)|(?:\(\s*([\$\w][\$\w]*)\s*,\s*([\$\w][\$\w]*)\s*\)))\s+in\s+([\s\S]+?)(?:\s+track\s+by\s+([\s\S]+?))?$/;
                         // 1: value expression (valueFn)
                         // 2: label expression (displayFn)
                         // 3: group by expression (groupByFn)
-                        // 4: array item variable name
-                        // 5: object item key variable name
-                        // 6: object item value variable name
-                        // 7: collection expression
-                        // 8: track by expression
+                        // 4: disable by expression (disableByFn)
+                        // 5: array item variable name
+                        // 6: object item key variable name
+                        // 7: object item value variable name
+                        // 8: collection expression
+                        // 9: track by expression
 // jshint maxlen: 100
 
 
@@ -215,14 +230,14 @@ var ngOptionsDirective = ['$compile', '$parse', function($compile, $parse) {
     // Extract the parts from the ngOptions expression
 
     // The variable name for the value of the item in the collection
-    var valueName = match[4] || match[6];
+    var valueName = match[5] || match[7];
     // The variable name for the key of the item in the collection
-    var keyName = match[5];
+    var keyName = match[6];
 
     // An expression that generates the viewValue for an option if there is a label expression
     var selectAs = / as /.test(match[0]) && match[1];
     // An expression that is used to track the id of each object in the options collection
-    var trackBy = match[8];
+    var trackBy = match[9];
     // An expression that generates the viewValue for an option if there is no label expression
     var valueFn = $parse(match[2] ? match[1] : valueName);
     var selectAsFn = selectAs && $parse(selectAs);
@@ -237,7 +252,8 @@ var ngOptionsDirective = ['$compile', '$parse', function($compile, $parse) {
                               function getHashOfValue(viewValue) { return hashKey(viewValue); };
     var displayFn = $parse(match[2] || match[1]);
     var groupByFn = $parse(match[3] || '');
-    var valuesFn = $parse(match[7]);
+    var disableByFn = $parse(match[4] || '');
+    var valuesFn = $parse(match[8]);
 
     var locals = {};
     var getLocals = keyName ? function(value, key) {
@@ -250,11 +266,12 @@ var ngOptionsDirective = ['$compile', '$parse', function($compile, $parse) {
     };
 
 
-    function Option(selectValue, viewValue, label, group) {
+    function Option(selectValue, viewValue, label, group, disabled) {
       this.selectValue = selectValue;
       this.viewValue = viewValue;
       this.label = label;
       this.group = group;
+      this.disabled = disabled;
     }
 
     return {
@@ -269,8 +286,10 @@ var ngOptionsDirective = ['$compile', '$parse', function($compile, $parse) {
           var locals = getLocals(values[key], key);
           var label = displayFn(scope, locals);
           var selectValue = getTrackByValue(values[key], locals);
+          var disabledBy = disableByFn(scope, locals);
           watchedArray.push(selectValue);
           watchedArray.push(label);
+          watchedArray.push(disabledBy);
         });
         return watchedArray;
       }),
@@ -296,7 +315,8 @@ var ngOptionsDirective = ['$compile', '$parse', function($compile, $parse) {
           var selectValue = getTrackByValue(viewValue, locals);
           var label = displayFn(scope, locals);
           var group = groupByFn(scope, locals);
-          var optionItem = new Option(selectValue, viewValue, label, group);
+          var disabled = disableByFn(scope, locals);
+          var optionItem = new Option(selectValue, viewValue, label, group, disabled);
 
           optionItems.push(optionItem);
           selectValueMap[selectValue] = optionItem;
@@ -322,7 +342,7 @@ var ngOptionsDirective = ['$compile', '$parse', function($compile, $parse) {
   return {
     restrict: 'A',
     terminal: true,
-    require: ['select', '?ngModel'],
+    require: ['select', 'ngModel'],
     link: function(scope, selectElement, attr, ctrls) {
 
       // if ngModel is not defined, we don't need to do anything
@@ -373,7 +393,7 @@ var ngOptionsDirective = ['$compile', '$parse', function($compile, $parse) {
       selectCtrl.writeValue = function writeNgOptionsValue(value) {
         var option = options.getOptionFromViewValue(value);
 
-        if (option) {
+        if (option && !option.disabled) {
           if (selectElement[0].value !== option.selectValue) {
             removeUnknownOption();
             removeEmptyOption();
@@ -397,7 +417,7 @@ var ngOptionsDirective = ['$compile', '$parse', function($compile, $parse) {
 
         var selectedOption = options.selectValueMap[selectElement.val()];
 
-        if (selectedOption) {
+        if (selectedOption && !selectedOption.disabled) {
           removeEmptyOption();
           removeUnknownOption();
           return selectedOption.viewValue;
@@ -422,18 +442,22 @@ var ngOptionsDirective = ['$compile', '$parse', function($compile, $parse) {
           if (value) {
             value.forEach(function(item) {
               var option = options.getOptionFromViewValue(item);
-              if (option) option.element.selected = true;
+              if (option && !option.disabled) option.element.selected = true;
             });
           }
         };
 
 
         selectCtrl.readValue = function readNgOptionsMultiple() {
-          var selectedValues = selectElement.val() || [];
-          return selectedValues.map(function(selectedKey) {
-            var option = options.selectValueMap[selectedKey];
-            return option.viewValue;
+          var selectedValues = selectElement.val() || [],
+              selections = [];
+
+          forEach(selectedValues, function(value) {
+            var option = options.selectValueMap[value];
+            if (!option.disabled) selections.push(option.viewValue);
           });
+
+          return selections;
         };
       }
 
@@ -466,6 +490,7 @@ var ngOptionsDirective = ['$compile', '$parse', function($compile, $parse) {
 
       function updateOptionElement(option, element) {
         option.element = element;
+        element.disabled = option.disabled;
         if (option.value !== element.value) element.value = option.selectValue;
         if (option.label !== element.label) {
           element.label = option.label;
diff --git a/test/ng/directive/ngOptionsSpec.js b/test/ng/directive/ngOptionsSpec.js
index 21f890fc5406..64be3176c06b 100644
--- a/test/ng/directive/ngOptionsSpec.js
+++ b/test/ng/directive/ngOptionsSpec.js
@@ -532,6 +532,57 @@ describe('ngOptions', function() {
     expect(options.eq(3)).toEqualOption('c');
   });
 
+  it('should disable options', function() {
+
+    scope.selected = '';
+    scope.options = [
+      { name: 'white', value: '#FFFFFF' },
+      { name: 'one', value: 1, unavailable: true },
+      { name: 'notTrue', value: false },
+      { name: 'thirty', value: 30, unavailable: false }
+    ];
+    createSelect({
+      'ng-options': 'o.value as o.name disable by o.unavailable for o in options',
+      'ng-model': 'selected'
+    });
+    var options = element.find('option');
+
+    expect(options.length).toEqual(5);
+    expect(options.eq(1).prop('disabled')).toEqual(false);
+    expect(options.eq(2).prop('disabled')).toEqual(true);
+    expect(options.eq(3).prop('disabled')).toEqual(false);
+    expect(options.eq(4).prop('disabled')).toEqual(false);
+  });
+
+  it('should not write disabled options from model', function() {
+    scope.selected = 30;
+    scope.options = [
+      { name: 'white', value: '#FFFFFF' },
+      { name: 'one', value: 1, unavailable: true },
+      { name: 'notTrue', value: false },
+      { name: 'thirty', value: 30, unavailable: false }
+    ];
+    createSelect({
+      'ng-options': 'o.value as o.name disable by o.unavailable for o in options',
+      'ng-model': 'selected'
+    });
+
+    var options = element.find('option');
+
+    expect(options.eq(3).prop('selected')).toEqual(true);
+
+    scope.$apply(function() {
+      scope.selected = 1;
+    });
+
+    options = element.find('option');
+
+    expect(element.val()).toEqualUnknownValue('?');
+    expect(options.length).toEqual(5);
+    expect(options.eq(0).prop('selected')).toEqual(true);
+    expect(options.eq(2).prop('selected')).toEqual(false);
+    expect(options.eq(4).prop('selected')).toEqual(false);
+  });
 
   describe('selectAs expression', function() {
     beforeEach(function() {
@@ -1164,6 +1215,31 @@ describe('ngOptions', function() {
       expect(element).toEqualSelectValue(scope.selected);
     });
 
+    it('should bind to object disabled', function() {
+      scope.selected = 30;
+      scope.options = [
+        { name: 'white', value: '#FFFFFF' },
+        { name: 'one', value: 1, unavailable: true },
+        { name: 'notTrue', value: false },
+        { name: 'thirty', value: 30, unavailable: false }
+      ];
+      createSelect({
+        'ng-options': 'o.value as o.name disable by o.unavailable for o in options',
+        'ng-model': 'selected'
+      });
+
+      var options = element.find('option');
+
+      expect(scope.options[1].unavailable).toEqual(true);
+      expect(options.eq(1).prop('disabled')).toEqual(true);
+
+      scope.$apply(function() {
+        scope.options[1].unavailable = false;
+      });
+
+      expect(scope.options[1].unavailable).toEqual(false);
+      expect(options.eq(1).prop('disabled')).toEqual(false);
+    });
 
     it('should insert a blank option if bound to null', function() {
       createSingleSelect();
@@ -1653,6 +1729,37 @@ describe('ngOptions', function() {
       expect(element.find('option')[1].selected).toBeTruthy();
     });
 
+    it('should not write disabled selections from model', function() {
+      scope.selected = [30];
+      scope.options = [
+        { name: 'white', value: '#FFFFFF' },
+        { name: 'one', value: 1, unavailable: true },
+        { name: 'notTrue', value: false },
+        { name: 'thirty', value: 30, unavailable: false }
+      ];
+      createSelect({
+        'ng-options': 'o.value as o.name disable by o.unavailable for o in options',
+        'ng-model': 'selected',
+        'multiple': true
+      });
+
+      var options = element.find('option');
+
+      expect(options.eq(0).prop('selected')).toEqual(false);
+      expect(options.eq(1).prop('selected')).toEqual(false);
+      expect(options.eq(2).prop('selected')).toEqual(false);
+      expect(options.eq(3).prop('selected')).toEqual(true);
+
+      scope.$apply(function() {
+        scope.selected.push(1);
+      });
+
+      expect(options.eq(0).prop('selected')).toEqual(false);
+      expect(options.eq(1).prop('selected')).toEqual(false);
+      expect(options.eq(2).prop('selected')).toEqual(false);
+      expect(options.eq(3).prop('selected')).toEqual(true);
+    });
+
 
     it('should update model on change', function() {
       createMultiSelect();