Gais is a municipality in the canton of Appenzell Ausserrhoden in Switzerland. The area of Gais is 21.2 km2 (8.2 sq mi).In 1977 Gais received the Wakker Prize for the development and preservation of its architectural heritage. The village square, the Protestant church of 1782, the former spa hotel Neuer Ochsen of 1796 and the Krone inn of 1781 are listed as heritage sites of national significance.