The Town of Erie is a Home Rule Town located in Weld and Boulder counties, Colorado, United States. The town population was 30,038 at the 2020 United States Census, a+65.64% increase since the 2010 United States Census. At the 2020 census, 17,387 Erie residents lived in Weld County and 12,651 lived in Boulder County. Erie is a part of the Denver-Aurora, CO Combined Statistical Area and the Front Range Urban Corridor.