| Petit Lac Saint-François | |
| Pushpin Map: | Quebec |
| Location: | Les Appalaches Regional County Municipality, Quebec, Canada |
| Inflow: | Ashberham River |
| Outflow: | Grand lac Saint François (discharge going to...) |
| Basin Countries: | Canada |
| Area: | NaNkm2 |
The Petit lac Saint-François (in English: Little Lake Saint François) is a lake located near the municipality of Saint-Joseph-de-Coleraine in the administrative region of Chaudière-Appalaches, in Quebec, in Canada. It receives the waters of the Ashberham River which has its source in Caribou Lake. The discharge of the lake joins the Grand lac Saint François, source of the Saint-François River which joins the Saint Lawrence River.[1]
Its area is approximately, its elevation is, and its maximum depth is . The route 112 gives access to the lake. An Abenaki reserve of 2722acres which was named Colraine Reserve was granted in 1853 in range #10 and range #11 west of the lake shore.;[2] it was abandoned in 1882. The Bécancour Trail (Abenaki Becancour Trail), passed by there, linked the Bécancour River and the basin of the Saint-François river.