Leonessa is also the name of a frazione of Bassano Romano.

Leonessa is a town and comune in the far northeastern part of the Province of Rieti in the Lazio region of central Italy. Its population in 2008 was around 2,700.

Situated in a small plain at the foot of Mt. Terminillo, one of the highest mountains of the Apennine range, in the winter Leonessa is known mostly as a low-key staging center for the ski slopes of the Terminillo, and in the summer as a weekend vacation town frequented for the most part by Romans with local roots.