Keego Harbor is a city in Oakland County in the U.S. state of Michigan. A northern suburb of Detroit, Keego Harbor is located roughly 27 miles from downtown Detroit, and about 3 miles southwest of Pontiac. As of the 2010 census, the city had a population of 2,970. With a land area of 0.50 square miles, Keego Harbor is the third-smallest city by land area in the state of Michigan, after Petersburg and Clarkston.