Sullivan County Airport (IATA: SIV, ICAO: KSIV, FAA LID: SIV) is a county-owned public-use airport located three nautical miles (6 km) northwest of the central business district of Sullivan, a city in Sullivan County, Indiana, United States.

[1] It is included in the FAA's National Plan of Integrated Airport Systems for 2011–2015, which categorized it as a general aviation facility.

[2] Sullivan County Airport covers an area of 108 acres (44 ha) at an elevation of 539 feet (164 m) above mean sea level.

[1] For the 12-month period ending December 31, 2019, the airport had 5,366 aircraft operations, an average of 103 per week: 97% general aviation and 3% air taxi.

At that time there were 21 aircraft based at this airport: 20 single-engine and 1 multi-engine.