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is a village in Mercer and Warren counties in the U.S. state of Illinois. The population was 863 at the 2000 census.
The Warren County portion of Alexis is part of the Galesburg Micropolitan Statistical Area, while the Mercer County portion is part of the Davenport–Moline–Rock Island, IA-IL Metropolitan Statistical Area.
The village is situated along the boundary between Warren and Mercer counties. In the 2000 census, 499 of Alexis' 863 residents (57.8%) lived in Warren County and 364 (42.2%) lived in Mercer County.
According to the United States Census Bureau, the village has a total area of 0.5 square miles (1.3 km²), all of it land.