Jasper County Airport (IATA: RNZ, ICAO: KRZL, FAA LID: RZL) is located one mile northwest of Rensselaer, in Jasper County, Indiana, United States.

[2] Most U.S. airports use the same three-letter location identifier for the FAA and IATA, but this airport is RZL to the FAA and RNZ to the IATA.

[3] Jasper County Airport covers 285 acres (115 ha) at an elevation of 698 feet (213 m).

[2] In 2006 the airport had 8,407 aircraft operations, an average of 23 per day: 98% general aviation and 2% air taxi.

In November 2016, there were 18 aircraft based at this airport: 16 single-engine, 1 multi-engine and 1 helicopter.