diff --git a/common/changes/office-ui-fabric-react/enable-jsx-key_2018-02-18-15-44.json b/common/changes/office-ui-fabric-react/enable-jsx-key_2018-02-18-15-44.json
new file mode 100644
index 00000000000000..fa18d8566bd883
--- /dev/null
+++ b/common/changes/office-ui-fabric-react/enable-jsx-key_2018-02-18-15-44.json
@@ -0,0 +1,11 @@
+{
+  "changes": [
+    {
+      "packageName": "office-ui-fabric-react",
+      "comment": "Enable jsx-key tslint rule",
+      "type": "patch"
+    }
+  ],
+  "packageName": "office-ui-fabric-react",
+  "email": "mark@thedutchies.com"
+}
\ No newline at end of file
diff --git a/packages/office-ui-fabric-react/src/components/ContextualMenu/examples/ContextualMenu.Customization.Example.tsx b/packages/office-ui-fabric-react/src/components/ContextualMenu/examples/ContextualMenu.Customization.Example.tsx
index 39bcefdc86f68c..cdf6e3742ce655 100644
--- a/packages/office-ui-fabric-react/src/components/ContextualMenu/examples/ContextualMenu.Customization.Example.tsx
+++ b/packages/office-ui-fabric-react/src/components/ContextualMenu/examples/ContextualMenu.Customization.Example.tsx
@@ -204,7 +204,7 @@ export class ContextualMenuCustomizationExample extends React.Component<{}, {}>
       <ul className='ms-ContextualMenu-customizationExample-categoriesList'>
         <li className='ms-ContextualMenu-item'>
           { item.categoryList.map((category: any) =>
-            <button className='ms-ContextualMenu-link' role='menuitem'>
+            <button className='ms-ContextualMenu-link' role='menuitem' key={category.name}>
               <div>
                 <span
                   className='ms-ContextualMenu-icon ms-ContextualMenu-customizationExample-categorySwatch'
diff --git a/packages/office-ui-fabric-react/src/components/OverflowSet/OverflowSet.tsx b/packages/office-ui-fabric-react/src/components/OverflowSet/OverflowSet.tsx
index c886a5f3eeb83c..c9355322dede0a 100644
--- a/packages/office-ui-fabric-react/src/components/OverflowSet/OverflowSet.tsx
+++ b/packages/office-ui-fabric-react/src/components/OverflowSet/OverflowSet.tsx
@@ -5,7 +5,7 @@ import {
   BaseComponent
 } from '../../Utilities';
 import { mergeStyles } from '../../Styling';
-import { IOverflowSet, IOverflowSetProps } from './OverflowSet.types';
+import { IOverflowSet, IOverflowSetProps, IOverflowSetItemProps } from './OverflowSet.types';
 import { FocusZone, FocusZoneDirection } from '../../FocusZone';
 
 import * as stylesImport from './OverflowSet.scss';
@@ -52,14 +52,12 @@ export class OverflowSet extends BaseComponent<IOverflowSetProps, {}> implements
   }
 
   @autobind
-  private _onRenderItems(items: any[]): JSX.Element[] {
+  private _onRenderItems(items: IOverflowSetItemProps[]): JSX.Element[] {
     return items.map((item, i) => {
       const wrapperDivProps: React.HTMLProps<HTMLDivElement> = { className: css('ms-OverflowSet-item', styles.item) };
-      if (item.key) {
-        wrapperDivProps.key = item.key;
-      }
+
       return (
-        <div {...wrapperDivProps}>
+        <div key={ item.key } { ...wrapperDivProps }>
           { this.props.onRenderItem(item) }
         </div>
       );
@@ -70,7 +68,7 @@ export class OverflowSet extends BaseComponent<IOverflowSetProps, {}> implements
   private _onRenderOverflowButtonWrapper(items: any[]): JSX.Element {
     const wrapperDivProps: React.HTMLProps<HTMLDivElement> = { className: css('ms-OverflowSet-overflowButton', styles.item) };
     return (
-      <div {...wrapperDivProps}>
+      <div { ...wrapperDivProps }>
         { this.props.onRenderOverflowButton(items) }
       </div>
     );
diff --git a/packages/office-ui-fabric-react/src/components/pickers/PeoplePicker/examples/PeoplePicker.Types.Example.tsx b/packages/office-ui-fabric-react/src/components/pickers/PeoplePicker/examples/PeoplePicker.Types.Example.tsx
index 7a879090d387b7..9e0ee4a011c868 100644
--- a/packages/office-ui-fabric-react/src/components/pickers/PeoplePicker/examples/PeoplePicker.Types.Example.tsx
+++ b/packages/office-ui-fabric-react/src/components/pickers/PeoplePicker/examples/PeoplePicker.Types.Example.tsx
@@ -289,7 +289,7 @@ export class PeoplePickerTypesExample extends BaseComponent<any, IPeoplePickerEx
           componentRef={ this._resolveRef('_picker') }
         />
         <label> Click to Add a person </label>
-        { controlledItems.map(item => <div>
+        { controlledItems.map((item, index) => <div key={ index }>
           <DefaultButton
             className='controlledPickerButton'
             // tslint:disable-next-line:jsx-no-lambda
@@ -299,7 +299,7 @@ export class PeoplePickerTypesExample extends BaseComponent<any, IPeoplePickerEx
               });
             } }
           >
-            <Persona { ...item} />
+            <Persona { ...item } />
           </DefaultButton>
         </div>) }
       </div>
diff --git a/packages/office-ui-fabric-react/tslint.json b/packages/office-ui-fabric-react/tslint.json
index 1ace03220456e0..6619dab9251e06 100644
--- a/packages/office-ui-fabric-react/tslint.json
+++ b/packages/office-ui-fabric-react/tslint.json
@@ -4,7 +4,6 @@
   ],
   "rules": {
     "jsx-no-string-ref": false,
-    "jsx-key": false,
     "jsx-boolean-value": false,
     "jsx-ban-props": false,
     "max-line-length": [