Porcupine Plain is a town in Saskatchewan, Canada. It is accessed by Highway 23. Greenwater Lake Provincial Park is 5 kilometres (3.1 mi) southwest on Highway 38. The town is located within the Porcupine Provincial Forest. The town was originally settled by returning World War I veterans who settled in the area during the early 1920s. Quilly Willy is the town mascot used on promotional material.