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Littleton, CO

The City of Littleton is a home rule municipality located in Arapahoe, Douglas, and Jefferson counties, Colorado, United States. Littleton is the county seat of Arapahoe County and is a part of the Denver–Aurora–Lakewood, CO Metropolitan Statistical Area. The city population was 45,652 at the 2020 United States Census, ranking as the 20th most populous municipality in the State of Colorado.