diff --git a/modules/@angular/router/src/create_url_tree.ts b/modules/@angular/router/src/create_url_tree.ts
index b30b2591cc..31d226a3d4 100644
--- a/modules/@angular/router/src/create_url_tree.ts
+++ b/modules/@angular/router/src/create_url_tree.ts
@@ -5,14 +5,14 @@ import { RouterState, ActivatedRoute } from './router_state';
 import { Params, PRIMARY_OUTLET } from './shared';
 
 export function createUrlTree(route: ActivatedRoute, urlTree: UrlTree, commands: any[], 
-                              queryParameters: Params | undefined, fragment: string | undefined): UrlTree {
+                              queryParams: Params | undefined, fragment: string | undefined): UrlTree {
   if (commands.length === 0) {
-    return tree(urlTree._root, urlTree, queryParameters, fragment);
+    return tree(urlTree._root, urlTree, queryParams, fragment);
   }
 
   const normalizedCommands = normalizeCommands(commands);
   if (navigateToRoot(normalizedCommands)) {
-    return tree(new TreeNode<UrlSegment>(urlTree.root, []), urlTree, queryParameters, fragment);
+    return tree(new TreeNode<UrlSegment>(urlTree.root, []), urlTree, queryParams, fragment);
   }
 
   const startingNode = findStartingNode(normalizedCommands, urlTree, route);
@@ -21,11 +21,11 @@ export function createUrlTree(route: ActivatedRoute, urlTree: UrlTree, commands:
       [];
   const newRoot = constructNewTree(urlTree._root, startingNode, updated);
 
-  return tree(newRoot, urlTree, queryParameters, fragment);
+  return tree(newRoot, urlTree, queryParams, fragment);
 }
 
-function tree(root: TreeNode<UrlSegment>, urlTree: UrlTree, queryParameters: Params | undefined, fragment: string | undefined): UrlTree {
-  const q = queryParameters ? stringify(queryParameters) : urlTree.queryParameters;
+function tree(root: TreeNode<UrlSegment>, urlTree: UrlTree, queryParams: Params | undefined, fragment: string | undefined): UrlTree {
+  const q = queryParams ? stringify(queryParams) : urlTree.queryParams;
   const f = fragment ? fragment : urlTree.fragment;
   return new UrlTree(root, q, f);
 }
diff --git a/modules/@angular/router/src/directives/router_link.ts b/modules/@angular/router/src/directives/router_link.ts
index a64da76336..c117784f99 100644
--- a/modules/@angular/router/src/directives/router_link.ts
+++ b/modules/@angular/router/src/directives/router_link.ts
@@ -67,7 +67,7 @@ export class RouterLink implements OnChanges {
     if (!(typeof this.target === "string") || this.target == '_self') {
       this.router.navigate(this.commands, {
         relativeTo: this.route,
-        queryParameters: this.queryParams,
+        queryParams: this.queryParams,
         fragment: this.fragment
       });
       return false;
@@ -78,7 +78,7 @@ export class RouterLink implements OnChanges {
   private updateTargetUrlAndHref(): void {
     const tree = this.router.createUrlTree(this.commands, {
       relativeTo: this.route,
-      queryParameters: this.queryParams,
+      queryParams: this.queryParams,
       fragment: this.fragment
     });
     if (tree) {
diff --git a/modules/@angular/router/src/recognize.ts b/modules/@angular/router/src/recognize.ts
index f875ffcbb7..cf2e820d35 100644
--- a/modules/@angular/router/src/recognize.ts
+++ b/modules/@angular/router/src/recognize.ts
@@ -13,7 +13,7 @@ export function recognize(rootComponentType: Type, config: RouterConfig, url: Ur
   try {
     const match = new MatchResult(rootComponentType, config, [url.root], {}, url._root.children, [], PRIMARY_OUTLET, null, url.root);
     const roots = constructActivatedRoute(match);
-    const res = new RouterStateSnapshot(roots[0], url.queryParameters, url.fragment);
+    const res = new RouterStateSnapshot(roots[0], url.queryParams, url.fragment);
     return new Observable<RouterStateSnapshot>(obs => {
       obs.next(res);
       obs.complete();
diff --git a/modules/@angular/router/src/router.ts b/modules/@angular/router/src/router.ts
index da0df2a1b8..e31bcb70b8 100644
--- a/modules/@angular/router/src/router.ts
+++ b/modules/@angular/router/src/router.ts
@@ -24,7 +24,7 @@ import 'rxjs/add/operator/concatMap';
 import {of} from 'rxjs/observable/of';
 import {forkJoin} from 'rxjs/observable/forkJoin';
 
-export interface NavigationExtras { relativeTo?: ActivatedRoute; queryParameters?: Params; fragment?: string; }
+export interface NavigationExtras { relativeTo?: ActivatedRoute; queryParams?: Params; fragment?: string; }
 
 /**
  * An event triggered when a navigation starts
@@ -169,9 +169,9 @@ export class Router {
    * router.createUrlTree(['../../team/44/user/22'], {relativeTo: route});
    * ```
    */
-  createUrlTree(commands: any[], {relativeTo, queryParameters, fragment}: NavigationExtras = {}): UrlTree {
+  createUrlTree(commands: any[], {relativeTo, queryParams, fragment}: NavigationExtras = {}): UrlTree {
     const a = relativeTo ? relativeTo : this.routerState.root;
-    return createUrlTree(a, this.currentUrlTree, commands, queryParameters, fragment);
+    return createUrlTree(a, this.currentUrlTree, commands, queryParams, fragment);
   }
 
 
@@ -193,7 +193,7 @@ export class Router {
   navigate(commands: any[], extras: NavigationExtras = {}): Promise<boolean> {
     return this.scheduleNavigation(this.createUrlTree(commands, extras), false);
   }
-  
+
   /**
    * Serializes a {@link UrlTree} into a string.
    */
diff --git a/modules/@angular/router/src/url_serializer.ts b/modules/@angular/router/src/url_serializer.ts
index 38cb8bb599..758ffea416 100644
--- a/modules/@angular/router/src/url_serializer.ts
+++ b/modules/@angular/router/src/url_serializer.ts
@@ -28,7 +28,7 @@ export class DefaultUrlSerializer implements UrlSerializer {
 
   serialize(tree: UrlTree): string { 
     const node = serializeUrlTreeNode(tree._root);
-    const query = serializeQueryParams(tree.queryParameters);
+    const query = serializeQueryParams(tree.queryParams);
     const fragment = tree.fragment !== null ? `#${tree.fragment}` : '';
     return `${node}${query}${fragment}`;
   }
diff --git a/modules/@angular/router/src/url_tree.ts b/modules/@angular/router/src/url_tree.ts
index 1837aff783..462173bded 100644
--- a/modules/@angular/router/src/url_tree.ts
+++ b/modules/@angular/router/src/url_tree.ts
@@ -13,7 +13,7 @@ export class UrlTree extends Tree<UrlSegment> {
   /**
    * @internal
    */
-  constructor(root: TreeNode<UrlSegment>, public queryParameters: {[key: string]: string}, public fragment: string | null) {
+  constructor(root: TreeNode<UrlSegment>, public queryParams: {[key: string]: string}, public fragment: string | null) {
     super(root);
   }
 }
diff --git a/modules/@angular/router/test/create_url_tree.spec.ts b/modules/@angular/router/test/create_url_tree.spec.ts
index 8973180a49..8c1575651b 100644
--- a/modules/@angular/router/test/create_url_tree.spec.ts
+++ b/modules/@angular/router/test/create_url_tree.spec.ts
@@ -143,19 +143,19 @@ describe('createUrlTree', () => {
   it("should set query params", () => {
     const p = serializer.parse("/");
     const t = create(p.root, p, [], {a: 'hey'});
-    expect(t.queryParameters).toEqual({a: 'hey'});
+    expect(t.queryParams).toEqual({a: 'hey'});
   });
 
   it("should stringify query params", () => {
     const p = serializer.parse("/");
     const t = create(p.root, p, [], <any>{a: 1});
-    expect(t.queryParameters).toEqual({a: '1'});
+    expect(t.queryParams).toEqual({a: '1'});
   });
 
   it("should reuse old query params when given undefined", () => {
     const p = serializer.parse("/?a=1");
     const t = create(p.root, p, [], undefined);
-    expect(t.queryParameters).toEqual({a: '1'});
+    expect(t.queryParams).toEqual({a: '1'});
   });
 
   it("should set fragment", () => {
@@ -171,12 +171,12 @@ describe('createUrlTree', () => {
   });
 });
 
-function create(start: UrlSegment | null, tree: UrlTree, commands: any[], queryParameters?: Params, fragment?: string) {
+function create(start: UrlSegment | null, tree: UrlTree, commands: any[], queryParams?: Params, fragment?: string) {
   if (!start) {
     expect(start).toBeDefined();
   }
   const s = new ActivatedRouteSnapshot([], <any>{}, PRIMARY_OUTLET, "someComponent", null, <any>start);
   const a = new ActivatedRoute(new BehaviorSubject(null), new BehaviorSubject(null), PRIMARY_OUTLET, "someComponent", s);
   advanceActivatedRoute(a);
-  return createUrlTree(a, tree, commands, queryParameters, fragment);
+  return createUrlTree(a, tree, commands, queryParams, fragment);
 }
\ No newline at end of file
diff --git a/modules/@angular/router/test/url_serializer.spec.ts b/modules/@angular/router/test/url_serializer.spec.ts
index 6c695a0ee1..3c94bd0ef2 100644
--- a/modules/@angular/router/test/url_serializer.spec.ts
+++ b/modules/@angular/router/test/url_serializer.spec.ts
@@ -86,12 +86,12 @@ describe('url serializer', () => {
 
   it("should parse query params", () => {
     const tree = url.parse("/one?a=1&b=2");
-    expect(tree.queryParameters).toEqual({a: '1', b: '2'});
+    expect(tree.queryParams).toEqual({a: '1', b: '2'});
   });
 
   it("should parse key only query params", () => {
     const tree = url.parse("/one?a");
-    expect(tree.queryParameters).toEqual({a: 'true'});
+    expect(tree.queryParams).toEqual({a: 'true'});
   });
 
   it("should serializer query params", () => {