Bessemer is a city in Jefferson County, Alabama, United States and a southwestern suburb of Birmingham. The population was 26,019 at t…Bessemer is a city in Jefferson County, Alabama, United States and a southwestern suburb of Birmingham. The population was 26,019 at the 2020 census. It is within the Birmingham-Hoover, AL Metropolitan Statistical Area, of which Jefferson County is the center. It developed rapidly as an industrial city in the late 19th and early 20th centuries.