Orange City Municipal Airport (ICAO: KORC, FAA LID: ORC) was a city-owned public-use airport located one nautical mile (1.85 km) south of the central business district of Orange City, a city in Sioux County, Iowa, United States. This airport was included in the FAA's National Plan of Integrated Airport Systems for 2009–2013, which categorized it as a general aviation facility.

Although many U.S. airports use the same three-letter location identifier for the FAA and IATA, this facility was assigned ORC by the FAA but had no designation from the IATA (which assigned ORC to Orocue Airport in Orocue, Colombia).

In 2018 the airport was closed and replaced by the new Sioux County Regional Airport located 5 miles to the west.

Orange City Municipal Airport covered an area of 80 acres (32 ha) at an elevation of 1,414 feet (431 m) above mean sea level. It had one runway designated 16/34 with a 4,250 by 60 feet (1,295 x 18 m) concrete surface. For the 12-month period ending August 19, 2009, the airport had 4,200 general aviation aircraft operations, an average of 81 per week: 43% local and 57% itinerant. At that time there were 11 aircraft based at this airport: 10 single-engine and 1 multi-engine.

• FAA Terminal Procedures for ORC, effective December 26, 2024
• Resources for this airport:
  • FAA airport information for ORC
  • AirNav airport information for KORC
  • FlightAware airport information and live flight tracker
  • NOAA/NWS weather observations: current, past three days
  • SkyVector aeronautical chart, Terminal Procedures