Domdidier (French: [dɔ̃didje]; Arpitan: Domdediér, locally Dondedi [dɔ̃dəˈdi] ) is a former municipality in the district of Broye, in the Canton of Fribourg , Switzerland . On 1 January 2016, the former municipalities of Domdidier, Dompierre, Léchelles and Russy merged to form Belmont-Broye.

Domdidier is first mentioned around 1157-62 as Donno Desiderio.

Domdidier had an area, as of 2009, of 8.9 square kilometers (3.4 sq mi). Of this area, 6.07 km2 (2.34 sq mi) or 68.1% is used for agricultural purposes, while 1.35 km2 (0.52 sq mi) or 15.2% is forested. Of the rest of the land, 1.41 km2 (0.54 sq mi) or 15.8% is settled (buildings or roads), 0.08 km2 (20 acres) or 0.9% is either rivers or lakes and 0.02 km2 (4.9 acres) or 0.2% is unproductive land.