Joyeux (French pronunciation: [ʒwajø] ⓘ) is a commune in the Ain department in eastern France.

Joyeux lies less than 5 km (3.1 mi) from the wildlife park at Villars-les-Dombes and 40 km (25 mi) from Lyon in the natural region of the Dombes, a wide extent of middle and upper Pleistocene moraine left near the margin of the Alpine ice sheets.

The commune includes some thirty lakes which together represent some 4 square kilometres of water.

On 13 February 2006, a wild duck was found dead on the fen.

It was the first attested case of the presence of the bird flu virus H5N1 in France.