Wabamum Lake is a lake in Alberta, Canada. It is 65 kilometres (40 miles) west of Edmonton, Alberta. It is 19.2 kilometres (11.9 miles) long and 6.6 kilometres (4.1 miles) wide. It covers 82 square kilometres (32 square miles). It is 11 metres (36 feet) deep at its deepest.
The name of the lake comes from the Cree language word for mirror.