Nicolet-Yamaska (French pronunciation: [nikɔlɛ(t) jamaska]) is a regional county municipality in the Centre-du-Québec region of Quebec, Canada.

The county seat is Nicolet.

There are 16 subdivisions within the RCM:[2] (not associated with RCM)

Mother tongue from 2016 Canadian Census[3] Highways and numbered routes that run through the municipality, including external routes that start or finish at the county border:[5]