Jefferson County
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Jefferson County is a county located in Alabama in the United States. It is the state's most populous county and includes the city of Birmingham, making it a major center of commerce, industry, and population in the region.
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Jefferson County is the most populous county in the U.S. state of Alabama, located in the central portion of the state. As of the 2020 census, its population was 674,721. Its county seat is Birmingham. Its rapid growth as an industrial city in the 20th century, based on heavy manufacturing in steel and iron, established its dominance. Jefferson County is the central county of the Birmingham-Hoover, AL Metropolitan Statistical Area.
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