Châteauneuf-sur-Sarthe (French pronunciation: [ʃɑtonœf syʁ saʁt] ⓘ) is a former commune in the Maine-et-Loire department of western France.

On 1 January 2019, it was merged into the commune Les Hauts-d'Anjou.

Châteauneuf-sur-Sarthe is to the north of the Loire Valley, an area famous for its historic towns, wine-growing region and cultural landscape.

The local areas is heavily farmed both for arable and pastoral uses.

By road the town is 19 km from exit 11 on the A11 with good links to Angers (20 miles) and Le Mans (50 miles) The nearest airports to are Angers, Le Mans, Nantes and Rennes; with the last two airports approximately 70 miles away.