|Primary inflows||Stoney Lake|
|Primary outflows||Otonabee River|
|Max. length||5 mi (8.0 km)|
|Max. width||0.5 mi (0.80 km)|
|Max. depth||50 ft (15 m)|
Katchewanooka Lake is one of the Kawartha lakes in south-central Ontario, Canada. It is about 5 miles (8.0 km) long and .5 miles (0.80 km) wide. The Trent Severn Waterway flows through Lake Katchewanooka into the Otonabee River at its outlet just north of Lakefield, continuing southwest through Peterborough into Rice Lake. Lakefield College School lies on the east side of the lake.
Although water levels in this lake and others in the Kawartha Lakes system are controlled to some extent by locks and dams, the lakeshore is vulnerable to flooding during the spring run-off period.
- "Katchewanooka Lake". Trent Severn Cruising Guide. Retrieved 2009-09-11.
- "Lakefield College School". Lakefield College School. Retrieved 2009-09-11.
- "Susanna Moodie Homestead, Lake Katchowanook, Canada West c.1854". Goldi Productions. Retrieved 2009-09-11.
- "Flood warning remains in effect but water levels have dropped". Metroland Media Group. 2008-04-17. Retrieved 2009-09-11.