Chicago/Aurora Municipal Airport (IATA: AUZ, ICAO: KARR, FAA LID: ARR) is a public airport opened in April 1966, located in the village of Sugar Grove, Illinois, United States, 8 miles (13 km) west of the city of Aurora, both in Kane County. The airport is owned and operated by the City of Aurora. It is 50 miles (80 km) west of Chicago and is designated as a reliever airport for Chicago's O'Hare and Midway airports.

Although most U.S. airports use the same three-letter location identifier for both the FAA and IATA, Chicago/Aurora Municipal Airport is assigned ARR by the FAA and AUZ by the IATA (which assigned ARR to Alto Río Senguer Airport in Argentina). The airport's ICAO identifier is KARR.

The airport is home to the Air Classics museum of Aviation, which strives to preserve aviation's role throughout history.