Fianarantsoa is a former province of Madagascar.
- Area: 103,272 km2.
- Population of 3,366,291 (July, 2001 estimate).
- Capital: Fianarantsoa.
- President: Fidy Mpanjato Rakotonarivo (since 2005).
One of its towns was Andohapatsakana. The province was home to four major national parks: Ranomafana National Park, Midongy Du Sud, Isalo National Park, and Andringitra.
It was frequently referred to in its abbreviated form of "Fianar".
Fianarantsoa Province bordered the following provinces: