Watertown Municipal Airport (ICAO: KRYV, FAA LID: RYV) is a public use airport located in and owned by the city of Watertown, in Jefferson County, Wisconsin, United States. It is included in the Federal Aviation Administration (FAA) National Plan of Integrated Airport Systems for 2021–2025, in which it is categorized as a regional general aviation facility. Although most U.S. airports use the same three-letter location identifier for the FAA and IATA, this airport is assigned RYV by the FAA but has no designation from the IATA.