Plateau d'Hauteville (French pronunciation: [plato dotvil]) is a commune in the Ain department in eastern France.

The municipality was established on 1 January 2019 by merger of the former communes of Cormaranche-en-Bugey, Hauteville-Lompnes (the seat), Hostiaz and Thézillieu.

The average annual temperature in Plateau d'Hauteville is 8.4 °C (47.1 °F).

The average annual rainfall is 1,564.4 mm (61.59 in) with November as the wettest month.

The temperatures are highest on average in July, at around 17.1 °C (62.8 °F), and lowest in January, at around 0.3 °C (32.5 °F).