Collevecchio (local dialect: Colevecchiu) is a comune (municipality) in the province of Rieti in the Italian region of Latium.

Collevecchio borders the following Comuni: Civita Castellana, Magliano Sabina, Montebuono, Ponzano Romano, Stimigliano, Tarano.

The frazione of Poggio Sommavilla is home to a prehistoric and arcaic archaeological site of Poggio Sommavilla on Tiber Valley with center acropolis and a necropolis.

The economy is based on agriculture (olive, wine) and animal husbandry (cattle and goats).

This Lazio location article is a stub.