Grimes Field (FAA LID: I74) is a city-owned public-use airport located one nautical mile (1.85 km) north of the central business district of Urbana, a city in Champaign County, Ohio, United States. The airport is named after Warren G. Grimes, a forefather in the field of aviation lighting. It primarily serves general aviation traffic. Although it is owned by the City of Urbana, Grimes Field is self-supporting.