diff --git a/packages/core/src/js/factories/Grid.js b/packages/core/src/js/factories/Grid.js
index fe038e654..6e7a1026c 100644
--- a/packages/core/src/js/factories/Grid.js
+++ b/packages/core/src/js/factories/Grid.js
@@ -1106,6 +1106,65 @@ angular.module('ui.grid')
     });
   };
 
+  /**
+   * @ngdoc function
+   * @name getRowsByKey
+   * @methodOf ui.grid.class:Grid
+   * @description returns the GridRows who have an key that is equal to comparator
+   * @param {boolean} isInEntity if true then key is in entity else it's directly in row
+   * @param {(string|number)} key the key to look for
+   * @param {any} comparator the value that key should have
+   * @param {array} lookInRows [optional] the rows to look in - if not provided then
+   * looks in grid.rows
+   */
+  Grid.prototype.getRowsByKey = function getRowsByKey(isInEntity, key, comparator, lookInRows) {
+    if ( key == void 0 ) {
+      return null;
+    }
+
+    lookInRows = lookInRows == void 0 ? this.rows : lookInRows;
+    var func = isInEntity ? function (row) {
+      return row.entity != void 0 && row.entity.hasOwnProperty(key) && row.entity[key] === comparator;
+    } : function (row) {
+      return row.hasOwnProperty(key) && row[key] === comparator;
+    }
+
+    return lookInRows.filter(func);
+  };
+
+  /**
+   * @ngdoc function
+   * @name findRowByKey
+   * @methodOf ui.grid.class:Grid
+   * @description returns the first GridRow which has an key that is equal to comparator
+   * @param {boolean} isInEntity if true then key is in entity else it's directly in row
+   * @param {(string|number)} key the key to look for
+   * @param {any} comparator the value that key should have
+   * @param {array} lookInRows [optional] the rows to look in - if not provided then
+   * looks in grid.rows
+   */
+  Grid.prototype.findRowByKey = function findRowByKey(isInEntity, key, comparator, lookInRows) {
+    var result = null;
+    if ( key != void 0 ) {
+      lookInRows = lookInRows == void 0 ? this.rows : lookInRows;
+      var func = isInEntity ? function (row) {
+        if ( row.entity != void 0 && row.entity.hasOwnProperty(key) && row.entity[key] === comparator ) {
+          result = row;
+          return false;
+        }
+        return true;
+      } : function (row) {
+        if ( row.hasOwnProperty(key) && row[key] === comparator ) {
+          result = row;
+          return false;
+        }
+        return true;
+      }
+
+      lookInRows.every(func);
+    }
+    return result
+  };
 
   /**
    * @ngdoc function
diff --git a/packages/core/test/core/factories/Grid.spec.js b/packages/core/test/core/factories/Grid.spec.js
index 690a78a4e..31ad34096 100644
--- a/packages/core/test/core/factories/Grid.spec.js
+++ b/packages/core/test/core/factories/Grid.spec.js
@@ -324,6 +324,64 @@ describe('Grid factory', function() {
 		});
 	});
 
+	describe('getting Rows', function() {
+		it('should get Rows', function() {
+			expect(grid.getRow()).toBe(null);
+			expect(grid.getRow(grid.rows[0].entity)).toBe(grid.rows[0]);
+			expect(grid.getRow(grid.rows[0].entity), [grid.rows[0]]).toBe(grid.rows[0]);
+		});
+
+		it('should get Rows by key', function() {
+			grid.rows[0].entity = {str: 'abc', num: 123, nll: null, multi: true};
+			grid.rows[1].entity = {multi: true};
+			grid.rows[0].str = 'abc';
+			grid.rows[0].num = 123;
+			grid.rows[0].nll = null;
+			grid.rows[0].innerMulti = false;
+			grid.rows[1].innerMulti = false;
+
+			expect(grid.getRowsByKey()).toBe(null);
+			expect(grid.getRowsByKey(true, "test")).toEqual([]);
+			expect(grid.getRowsByKey(true, "str", "abc")[0].entity).toBe(grid.rows[0].entity);
+			expect(grid.getRowsByKey(true, "str", "def")).toEqual([]);
+			expect(grid.getRowsByKey(true, "num", 123)[0].entity).toBe(grid.rows[0].entity);
+			expect(grid.getRowsByKey(true, "nll", null)[0].entity).toBe(grid.rows[0].entity);
+			expect(grid.getRowsByKey(true, "multi", true).length).toBe(2);
+
+			expect(grid.getRowsByKey(false, "test")).toEqual([]);
+			expect(grid.getRowsByKey(false, "str", "abc")).toEqual([grid.rows[0]]);
+			expect(grid.getRowsByKey(false, "str", "def")).toEqual([]);
+			expect(grid.getRowsByKey(false, "num", 123)).toEqual([grid.rows[0]]);
+			expect(grid.getRowsByKey(false, "nll", null)).toEqual([grid.rows[0]]);
+			expect(grid.getRowsByKey(false, "innerMulti", false).length).toBe(2);
+		});
+
+		it('should find first Row by key', function() {
+			grid.rows[0].entity = {str: 'abc', num: 123, nll: null, multi: true};
+			grid.rows[1].entity = {multi: true};
+			grid.rows[0].str = 'abc';
+			grid.rows[0].num = 123;
+			grid.rows[0].nll = null;
+			grid.rows[0].innerMulti = false;
+			grid.rows[1].innerMulti = false;
+
+			expect(grid.findRowByKey()).toBe(null);
+			expect(grid.findRowByKey(true, "test")).toBe(null);
+			expect(grid.findRowByKey(true, "str", "abc").entity).toBe(grid.rows[0].entity);
+			expect(grid.findRowByKey(true, "str", "def")).toBe(null);
+			expect(grid.findRowByKey(true, "num", 123).entity).toBe(grid.rows[0].entity);
+			expect(grid.findRowByKey(true, "nll", null).entity).toBe(grid.rows[0].entity);
+			expect(grid.findRowByKey(true, "multi", true).entity).toBe(grid.rows[0].entity);
+
+			expect(grid.findRowByKey(false, "test")).toBe(null);
+			expect(grid.findRowByKey(false, "str", "abc")).toBe(grid.rows[0]);
+			expect(grid.findRowByKey(false, "str", "def")).toBe(null);
+			expect(grid.findRowByKey(false, "num", 123)).toBe(grid.rows[0]);
+			expect(grid.findRowByKey(false, "nll", null)).toBe(grid.rows[0]);
+			expect(grid.findRowByKey(false, "innerMulti", false).entity).toBe(grid.rows[0].entity);
+		});
+	})
+
 	describe('buildColumns', function() {
 		it('guess correct column types when not specified', function() {
 			var dataRow = {str: 'abc', num: 123, dat: new Date(), bool: true, obj: {}, nll: null, negNum: -1, posNum: +1};
diff --git a/packages/selection/src/js/selection.js b/packages/selection/src/js/selection.js
index 7d0898869..48901c6ac 100644
--- a/packages/selection/src/js/selection.js
+++ b/packages/selection/src/js/selection.js
@@ -201,7 +201,7 @@
                  */
                 toggleRowSelection: function (rowEntity, evt) {
                   var row = grid.getRow(rowEntity);
-                  if (row !== null) {
+                  if (row != void 0 && row !== null) {
                     service.toggleRowSelection(grid, row, evt, grid.options.multiSelect, grid.options.noUnselect, true);
                   }
                 },
@@ -215,7 +215,7 @@
                  */
                 selectRow: function (rowEntity, evt) {
                   var row = grid.getRow(rowEntity);
-                  if (row !== null && !row.isSelected) {
+                  if (row != void 0 && row !== null && !row.isSelected) {
                     service.toggleRowSelection(grid, row, evt, grid.options.multiSelect, grid.options.noUnselect, true);
                   }
                 },
@@ -232,7 +232,24 @@
                  */
                 selectRowByVisibleIndex: function (rowNum, evt) {
                   var row = grid.renderContainers.body.visibleRowCache[rowNum];
-                  if (row !== null && typeof (row) !== 'undefined' && !row.isSelected) {
+                  if (row != void 0 && row !== null && typeof (row) !== 'undefined' && !row.isSelected) {
+                    service.toggleRowSelection(grid, row, evt, grid.options.multiSelect, grid.options.noUnselect, false);
+                  }
+                },
+                /**
+                 * @ngdoc function
+                 * @name selectRowByKey
+                 * @methodOf  ui.grid.selection.api:PublicApi
+                 * @description Select the data row
+                 * @param {boolean} isInEntity if true then key is in entity else it's directly in row
+                 * @param {Symbol} key the key to look for
+                 * @param {any} comparator the value that key should have
+                 * @param {Event} evt object if raised from an event
+                 * @param {array} lookInRows [optional] the rows to look in - if not provided then looks in grid.rows
+                */
+                selectRowByKey: function (isInEntity, key, comparator, evt, lookInRows) {
+                  var row = grid.findRowByKey(isInEntity, key, comparator, lookInRows);
+                  if (row != void 0 && row !== null && typeof (row) !== 'undefined' && !row.isSelected) {
                     service.toggleRowSelection(grid, row, evt, grid.options.multiSelect, grid.options.noUnselect, false);
                   }
                 },
@@ -246,7 +263,7 @@
                  */
                 unSelectRow: function (rowEntity, evt) {
                   var row = grid.getRow(rowEntity);
-                  if (row !== null && row.isSelected) {
+                  if (row != void 0 && row !== null && row.isSelected) {
                     service.toggleRowSelection(grid, row, evt, grid.options.multiSelect, grid.options.noUnselect, true);
                   }
                 },
@@ -263,7 +280,24 @@
                  */
                 unSelectRowByVisibleIndex: function (rowNum, evt) {
                   var row = grid.renderContainers.body.visibleRowCache[rowNum];
-                  if (row !== null && typeof (row) !== 'undefined' && row.isSelected) {
+                  if (row != void 0 && row !== null && typeof (row) !== 'undefined' &&  row.isSelected) {
+                    service.toggleRowSelection(grid, row, evt, grid.options.multiSelect, grid.options.noUnselect, false);
+                  }
+                },
+                /**
+                 * @ngdoc function
+                 * @name unSelectRowByKey
+                 * @methodOf  ui.grid.selection.api:PublicApi
+                 * @description Select the data row
+                 * @param {boolean} isInEntity if true then key is in entity else it's directly in row
+                 * @param {(string|number)} key the key to look for
+                 * @param {any} comparator the value that key should have
+                 * @param {Event} evt object if raised from an event
+                 * @param {array} lookInRows [optional] the rows to look in - if not provided then looks in grid.rows
+                */
+                unSelectRowByKey: function (isInEntity, key, comparator, evt, lookInRows) {
+                  var row = grid.findRowByKey(isInEntity, key, comparator, lookInRows);
+                  if (row != void 0 && row !== null && typeof (row) !== 'undefined' &&  row.isSelected) {
                     service.toggleRowSelection(grid, row, evt, grid.options.multiSelect, grid.options.noUnselect, false);
                   }
                 },
diff --git a/packages/selection/test/uiGridSelectionService.spec.js b/packages/selection/test/uiGridSelectionService.spec.js
index 2602c63d0..6e32757f9 100644
--- a/packages/selection/test/uiGridSelectionService.spec.js
+++ b/packages/selection/test/uiGridSelectionService.spec.js
@@ -247,6 +247,69 @@ describe('ui.grid.selection uiGridSelectionService', function() {
 			grid.api.selection.selectRow(grid.rows[4].entity);
 			expect(grid.rows[4].isSelected).toBe(false);
 		});
+
+		it('select by key then unselect rows by key in entity, including selecting rows already selected and unselecting rows not selected', function() {
+			grid.rows[4].entity = {str: 'abc'};
+			grid.rows[6].entity = {str: 'def'};
+			grid.api.selection.selectRowByKey(true, "str", "abc");
+			expect(grid.rows[4].isSelected).toBe(true);
+
+			grid.api.selection.selectRowByKey(true, "str", "def");
+			expect(grid.rows[4].isSelected).toBe(true);
+			expect(grid.rows[6].isSelected).toBe(true);
+
+			grid.api.selection.selectRowByKey(true, "str", "abc");
+			expect(grid.rows[4].isSelected).toBe(true);
+			expect(grid.rows[6].isSelected).toBe(true);
+
+			grid.api.selection.unSelectRowByKey(true, "str", "abc");
+			expect(grid.rows[4].isSelected).toBe(false);
+			expect(grid.rows[6].isSelected).toBe(true);
+
+			grid.api.selection.unSelectRowByKey(true, "str", "abc");
+			expect(grid.rows[4].isSelected).toBe(false);
+			expect(grid.rows[6].isSelected).toBe(true);
+
+			grid.api.selection.unSelectRowByKey(true, "str", "def");
+			expect(grid.rows[4].isSelected).toBe(false);
+			expect(grid.rows[6].isSelected).toBe(false);
+
+			grid.rows[4].enableSelection = false;
+			grid.api.selection.selectRowByKey(true, "str", "abc");
+			expect(grid.rows[4].isSelected).toBe(false);
+		});
+
+		it('select by key then unselect rows by key outside entity, including selecting rows already selected and unselecting rows not selected', function() {
+			grid.rows[4].str = 'abc';
+			grid.rows[6].str = 'def';
+
+			grid.api.selection.selectRowByKey(false, "str", "abc");
+			expect(grid.rows[4].isSelected).toBe(true);
+
+			grid.api.selection.selectRowByKey(false, "str", "def");
+			expect(grid.rows[4].isSelected).toBe(true);
+			expect(grid.rows[6].isSelected).toBe(true);
+
+			grid.api.selection.selectRowByKey(false, "str", "abc");
+			expect(grid.rows[4].isSelected).toBe(true);
+			expect(grid.rows[6].isSelected).toBe(true);
+
+			grid.api.selection.unSelectRowByKey(false, "str", "abc");
+			expect(grid.rows[4].isSelected).toBe(false);
+			expect(grid.rows[6].isSelected).toBe(true);
+
+			grid.api.selection.unSelectRowByKey(false, "str", "abc");
+			expect(grid.rows[4].isSelected).toBe(false);
+			expect(grid.rows[6].isSelected).toBe(true);
+
+			grid.api.selection.unSelectRowByKey(false, "str", "def");
+			expect(grid.rows[4].isSelected).toBe(false);
+			expect(grid.rows[6].isSelected).toBe(false);
+
+			grid.rows[4].enableSelection = false;
+			grid.api.selection.selectRowByKey(false, "str", "abc");
+			expect(grid.rows[4].isSelected).toBe(false);
+		});
 	});
 
 	describe('setSelected function', function() {