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Helena, Alabama. Helena (pronunciation [3]) is a city in Jefferson and Shelby Counties in the State of Alabama. Helena is considered a suburb of Birmingham and part of the Birmingham-Hoover Metropolitan Area. As of the 2010 census the population was 16,793.
Jefferson County is the most populous county in the State of Alabama. As of the 2010 census, the population was 658,466, making it the most populous county in Alabama. Its county seat is Birmingham, the most populous city in the state.