Tenants Harbor in Saint George is located about 12 miles southwest of Rockland Harbor. Primarily a lobster port, the harbor is also utilized by recreational craft.

Corps work in the harbor consists of a 1,100-foot-long channel, 15 feet deep and 280 feet wide, extending westerly from a natural 15-foot depth in the harbor to a point immediately past Steamboat Wharf. The project was completed in 1919.