Fort Madison–Keokuk, IA-IL-MO Micropolitan Statistical Area
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The Fort Madison–Keokuk, IA-IL-MO Micropolitan Statistical Area, as defined by the United States Census Bureau, locally known as the "Tri-State" area, was an area consisting of three counties – one in southeast Iowa, one in northeast Missouri, and one in west central Illinois, anchored by the cities of Fort Madison, Iowa and Keokuk, Iowa.[1] As of the 2010 census, the μSA had a population of 62,105.[2] An estimate by the Census Bureau, as of July 1, 2012, placed the population at 61,477, a decrease of 1.01%.[2] When the 2023 definitions were released this area was dissolved with Lee County, Iowa being included as part of the Burlington–Fort Madison, IA–IL Combined Statistical Area.[3]