Watonga Lake is a reservoir in Blaine County, Oklahoma.

[1] It is 7 miles (11 km) north of Watonga, Oklahoma.

Constructed by the Oklahoma Department of Wildlife Conservation (ODWC) in 1955, is adjacent to Roman Nose State Park, with which it shares many recreational facilities.

[2] The name Watonga was that of an Arapaho tribe leader (also given as woteen-kotuh'oo) meaning "black coyote.

The surface area is 55 acres (22 ha), the rated capacity is 656 acre-feet (809,000 m3), the shore line is 2.5 miles (4.0 km), average depth is 11.9 feet (3.6 m) and the maximum depth is 26 feet (7.9 m)[2] The elevation is 1,375 feet (419 m).