Alexander County is the southernmost and southwesternmost county in the U.S. state of Illinois. As of the 2020 census, the population was 5,240. Its county seat is Cairo and its western boundary is formed by the Mississippi River. Wikipedia
Population: 4,858 (2022)
County seat: Cairo
Area: 253 mi²
Congressional district: 12th
Founded: 1819
Named for: William M. Alexander
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