Otter Lake is an all-sports, 74-acre (30 ha) Oakland County, Michigan lake along the main branch of the Clinton River.

To the south is 458-acre Sylvan Lake, which joins the 74-acre (30 ha) Otter Lake, for a total of 532 acres (215 ha) of lake, making it the seventh largest lake in Oakland County.

[3] The lake lies in Waterford Township, Michigan and is west of Pontiac, Michigan.

Otter Lake is named for the North American river otter, which are indigenous to the area.

[4][5] Fish in Otter Lake include black crappie, largemouth bass, northern pike, panfish, rock bass, smallmouth bass and walleye.