diff --git a/polygerrit-ui/app/elements/admin/gr-admin-group-list/gr-admin-group-list.js b/polygerrit-ui/app/elements/admin/gr-admin-group-list/gr-admin-group-list.js
index 5a463be..4073798 100644
--- a/polygerrit-ui/app/elements/admin/gr-admin-group-list/gr-admin-group-list.js
+++ b/polygerrit-ui/app/elements/admin/gr-admin-group-list/gr-admin-group-list.js
@@ -128,8 +128,17 @@
           });
     },
 
+    _refreshGroupsList() {
+      this.$.restAPI.invalidateGroupsCache(this._filter,
+          this._groupsPerPage, this._offset);
+      return this._getGroups(this._filter, this._groupsPerPage,
+          this._offset);
+    },
+
     _handleCreateGroup() {
-      this.$.createNewModal.handleCreateGroup();
+      this.$.createNewModal.handleCreateGroup().then(() => {
+        this._refreshGroupsList();
+      });
     },
 
     _handleCloseCreate() {
diff --git a/polygerrit-ui/app/elements/admin/gr-repo-list/gr-repo-list.js b/polygerrit-ui/app/elements/admin/gr-repo-list/gr-repo-list.js
index 4b82e57..116f084 100644
--- a/polygerrit-ui/app/elements/admin/gr-repo-list/gr-repo-list.js
+++ b/polygerrit-ui/app/elements/admin/gr-repo-list/gr-repo-list.js
@@ -129,8 +129,17 @@
           });
     },
 
+    _refreshReposList() {
+      this.$.restAPI.invalidateReposCache(this._filter,
+          this._reposPerPage, this._offset);
+      return this._getRepos(this._filter, this._reposPerPage,
+          this._offset);
+    },
+
     _handleCreateRepo() {
-      this.$.createNewModal.handleCreateRepo();
+      this.$.createNewModal.handleCreateRepo().then(() => {
+        this._refreshReposList();
+      });
     },
 
     _handleCloseCreate() {
diff --git a/polygerrit-ui/app/elements/shared/gr-rest-api-interface/gr-rest-api-interface.js b/polygerrit-ui/app/elements/shared/gr-rest-api-interface/gr-rest-api-interface.js
index fd25908..d9b0cbf 100644
--- a/polygerrit-ui/app/elements/shared/gr-rest-api-interface/gr-rest-api-interface.js
+++ b/polygerrit-ui/app/elements/shared/gr-rest-api-interface/gr-rest-api-interface.js
@@ -169,6 +169,16 @@
     delete(key) {
       this._cache().delete(key);
     }
+
+    invalidatePrefix(prefix) {
+      const newMap = new Map();
+      for (const [key, value] of this._cache().entries()) {
+        if (!key.startsWith(prefix)) {
+          newMap.set(key, value);
+        }
+      }
+      this._data.set(window.CANONICAL_PATH, newMap);
+    }
   }
 
   Polymer({
@@ -1207,6 +1217,20 @@
       return this._sharedFetchPromises[req.url];
     },
 
+    /**
+     * @param {string} prefix
+     */
+    _invalidateSharedFetchPromisesPrefix(prefix) {
+      const newObject = {};
+      Object.entries(this._sharedFetchPromises).forEach(([key, value]) => {
+        if (!key.startsWith(prefix)) {
+          newObject[key] = value;
+        }
+      });
+      this._sharedFetchPromises = newObject;
+      this._cache.invalidatePrefix(prefix);
+    },
+
     _isNarrowScreen() {
       return window.innerWidth < MAX_UNIFIED_DEFAULT_WINDOW_WIDTH_PX;
     },
@@ -1533,25 +1557,20 @@
      * @param {string} filter
      * @param {number} groupsPerPage
      * @param {number=} opt_offset
-     * @return {!Promise<?Object>}
      */
-    getGroups(filter, groupsPerPage, opt_offset) {
+    _getGroupsUrl(filter, groupsPerPage, opt_offset) {
       const offset = opt_offset || 0;
 
-      return this._fetchSharedCacheURL({
-        url: `/groups/?n=${groupsPerPage + 1}&S=${offset}` +
-            this._computeFilter(filter),
-        anonymizedUrl: '/groups/?*',
-      });
+      return `/groups/?n=${groupsPerPage + 1}&S=${offset}` +
+        this._computeFilter(filter);
     },
 
     /**
      * @param {string} filter
      * @param {number} reposPerPage
      * @param {number=} opt_offset
-     * @return {!Promise<?Object>}
      */
-    getRepos(filter, reposPerPage, opt_offset) {
+    _getReposUrl(filter, reposPerPage, opt_offset) {
       const defaultFilter = 'state:active OR state:read-only';
       const namePartDelimiters = /[@.\-\s\/_]/g;
       const offset = opt_offset || 0;
@@ -1578,11 +1597,46 @@
       filter = filter.trim();
       const encodedFilter = encodeURIComponent(filter);
 
+      return `/projects/?n=${reposPerPage + 1}&S=${offset}` +
+        `&query=${encodedFilter}`;
+    },
+
+    invalidateGroupsCache() {
+      this._invalidateSharedFetchPromisesPrefix('/groups/?');
+    },
+
+    invalidateReposCache(filter, reposPerPage, opt_offset) {
+      this._invalidateSharedFetchPromisesPrefix('/projects/?');
+    },
+
+    /**
+     * @param {string} filter
+     * @param {number} groupsPerPage
+     * @param {number=} opt_offset
+     * @return {!Promise<?Object>}
+     */
+    getGroups(filter, groupsPerPage, opt_offset) {
+      const url = this._getGroupsUrl(filter, groupsPerPage, opt_offset);
+
+      return this._fetchSharedCacheURL({
+        url,
+        anonymizedUrl: '/groups/?*',
+      });
+    },
+
+    /**
+     * @param {string} filter
+     * @param {number} reposPerPage
+     * @param {number=} opt_offset
+     * @return {!Promise<?Object>}
+     */
+    getRepos(filter, reposPerPage, opt_offset) {
+      const url = this._getReposUrl(filter, reposPerPage, opt_offset);
+
       // TODO(kaspern): Rename rest api from /projects/ to /repos/ once backend
       // supports it.
       return this._fetchSharedCacheURL({
-        url: `/projects/?n=${reposPerPage + 1}&S=${offset}` +
-            `&query=${encodedFilter}`,
+        url,
         anonymizedUrl: '/projects/?*',
       });
     },
diff --git a/polygerrit-ui/app/elements/shared/gr-rest-api-interface/gr-rest-api-interface_test.html b/polygerrit-ui/app/elements/shared/gr-rest-api-interface/gr-rest-api-interface_test.html
index b3496ce..667f24c 100644
--- a/polygerrit-ui/app/elements/shared/gr-rest-api-interface/gr-rest-api-interface_test.html
+++ b/polygerrit-ui/app/elements/shared/gr-rest-api-interface/gr-rest-api-interface_test.html
@@ -96,6 +96,18 @@
       });
     });
 
+    test('cache invalidation', () => {
+      element._cache.set('/foo/bar', 1);
+      element._cache.set('/bar', 2);
+      element._sharedFetchPromises['/foo/bar'] = 3;
+      element._sharedFetchPromises['/bar'] = 4;
+      element._invalidateSharedFetchPromisesPrefix('/foo/');
+      assert.isFalse(element._cache.has('/foo/bar'));
+      assert.isTrue(element._cache.has('/bar'));
+      assert.isUndefined(element._sharedFetchPromises['/foo/bar']);
+      assert.strictEqual(4, element._sharedFetchPromises['/bar']);
+    });
+
     test('params are properly encoded', () => {
       let url = element._urlWithParams('/path/', {
         sp: 'hola',
@@ -926,6 +938,31 @@
       });
     });
 
+    test('normal use', () => {
+      const defaultQuery = 'state%3Aactive%20OR%20state%3Aread-only';
+
+      assert.equal(element._getReposUrl('test', 25),
+          '/projects/?n=26&S=0&query=test');
+
+      assert.equal(element._getReposUrl(null, 25),
+          `/projects/?n=26&S=0&query=${defaultQuery}`);
+
+      assert.equal(element._getReposUrl('test', 25, 25),
+          '/projects/?n=26&S=25&query=test');
+    });
+
+    test('invalidateReposCache', () => {
+      const url = '/projects/?n=26&S=0&query=test';
+
+      element._cache.set(url, {});
+
+      element.invalidateReposCache('test', 25);
+
+      assert.isUndefined(element._sharedFetchPromises[url]);
+
+      assert.isFalse(element._cache.has(url));
+    });
+
     suite('getRepos', () => {
       const defaultQuery = 'state%3Aactive%20OR%20state%3Aread-only';
 
@@ -990,11 +1027,57 @@
       });
     });
 
-    test('getGroups filter regex', () => {
-      sandbox.stub(element, '_fetchSharedCacheURL');
-      element.getGroups('^test.*', 25);
-      assert.equal(element._fetchSharedCacheURL.lastCall.args[0].url,
-          '/groups/?n=26&S=0&r=%5Etest.*');
+    test('_getGroupsUrl normal use', () => {
+      assert.equal(element._getGroupsUrl('test', 25),
+          '/groups/?n=26&S=0&m=test');
+
+      assert.equal(element._getGroupsUrl(null, 25),
+          '/groups/?n=26&S=0');
+
+      assert.equal(element._getGroupsUrl('test', 25, 25),
+          '/groups/?n=26&S=25&m=test');
+    });
+
+    test('invalidateGroupsCache', () => {
+      const url = '/groups/?n=26&S=0&m=test';
+
+      element._cache.set(url, {});
+
+      element.invalidateGroupsCache('test', 25);
+
+      assert.isUndefined(element._sharedFetchPromises[url]);
+
+      assert.isFalse(element._cache.has(url));
+    });
+
+    suite('getGroups', () => {
+      setup(() => {
+        sandbox.stub(element, '_fetchSharedCacheURL');
+      });
+
+      test('normal use', () => {
+        element.getGroups('test', 25);
+        assert.equal(element._fetchSharedCacheURL.lastCall.args[0].url,
+            '/groups/?n=26&S=0&m=test');
+
+        element.getGroups(null, 25);
+        assert.equal(element._fetchSharedCacheURL.lastCall.args[0].url,
+            '/groups/?n=26&S=0');
+
+        element.getGroups('test', 25, 25);
+        assert.equal(element._fetchSharedCacheURL.lastCall.args[0].url,
+            '/groups/?n=26&S=25&m=test');
+      });
+
+      test('regex', () => {
+        element.getGroups('^test.*', 25);
+        assert.equal(element._fetchSharedCacheURL.lastCall.args[0].url,
+            '/groups/?n=26&S=0&r=%5Etest.*');
+
+        element.getGroups('^test.*', 25, 25);
+        assert.equal(element._fetchSharedCacheURL.lastCall.args[0].url,
+            '/groups/?n=26&S=25&r=%5Etest.*');
+      });
     });
 
     test('gerrit auth is used', () => {