Erie Municipal Airport (ICAO: KEIK, FAA LID: EIK) is a public airport located three miles (5 km) south of the central business district of Erie, in Weld County, Colorado, United States. Owned and operated by the Town of Erie, it is a general aviation airport with no scheduled passenger service. It was formerly a private airport called Tri-County Airport. Its previous designation was 48V.
This airport is at the southwestern corner of Weld County, bordering Boulder County to the west and the City and County of Broomfield to the south. This particular part of Broomfield was in Adams County prior to the creation of Broomfield County in 2001. The airport is on the north side of State Highway 7 (Baseline Road) about 4 miles (6.4 km) west of I-25. Adjacent to the airport is the Erie Airpark subdivision, a residential area designed for private-plane commuters.