Geography According to the United States Census Bureau, the city has a total area of , of which is land and is water. The world's largest man-made fresh water harbor offers a harbor of refuge to ships traveling between Port Huron and Pointe Aux Barques.The marina at Harbor Beach It is considered to be part of the Thumb of Michigan, which in turn is a subregion of the Flint/Tri-Cities region. The two main state highways are M-25 and M-142.
geography according to the united states census bureau the city has a total area of  of which is land and is water the world's largest man-made fresh water harbor offers a harbor of refuge to ships traveling between port huron and pointe aux barquesthe marina at harbor beach it is considered to be part of the thumb of michigan which in turn is a subregion of the flint/tri-cities region the two main state highways are m-25 and m-142