Lotbinière (French pronunciation: [lɔtbinjɛʁ]) is a regional county municipality in the Chaudière-Appalaches region of Quebec.

It is an almost exclusively rural RCM, with no village with a population above 4,000.

As of the 2016 Canadian census, the RCM had a population of 31,741.

[3] Its seat is in Sainte-Croix.

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]