Merrill Municipal Airport (IATA: RRL, ICAO: KRRL, FAA LID: RRL) is a city owned public use airport located one nautical mile (2 km) northwest of the central business district of Merrill, a city in Lincoln County, Wisconsin, United States. It is included in the Federal Aviation Administration (FAA) National Plan of Integrated Airport Systems for 2025–2029, in which it is categorized as a local general aviation facility.