Nevada County Air Park (ICAO: KGOO, FAA LID: GOO, formerly O17) is a public airport in Nevada County, California, three miles east of Grass Valley, California. It is also known as Nevada County Airport.

Most U.S. airports use the same three-letter location identifier for the Federal Aviation Administration (FAA) and IATA, but this airport is GOO to the FAA and has no IATA code.