Indianapolis International Airport (IATA: IND, ICAO: KIND, FAA LID: IND) is an international airport located seven miles (11 km) southwest of Downtown Indianapolis in Marion County, Indiana, United States. It is owned and operated by the Indianapolis Airport Authority and has flights to over 51 destinations in the United States, Canada, Europe, and Mexico. As of 2023, it was the 43rd-busiest airport in the U.S. and the busiest in Indiana with 4,788,376 passengers.

The airport occupies 7,700 acres (3,116 ha) in Wayne and Decatur townships in Marion County. IND is home to the second largest FedEx Express hub in the world; only the FedEx SuperHub in Memphis, Tennessee, surpasses its cargo traffic. Largely because of FedEx's activity, IND consistently ranks among the top 10 busiest U.S. airports in terms of air cargo throughput. Republic Airways is also headquartered at the airport, and Allegiant Air maintains Indianapolis as a focus city.

The Indianapolis Air Route Traffic Control Center (ZID), one of 22 established FAA area control centers, is located on the airport property's north side.

The Federal Aviation Administration (FAA) National Plan of Integrated Airport Systems for 2017–2021 categorized it as a medium hub primary commercial service facility.