Griffith-Merrillville Airport is a public-use airport two miles east of Griffith, in Lake County, Indiana, United States. Until 2023, it was privately owned by Griffith Aviation, Inc. until 2023.

Facilities

The airport covers 122 acre at an elevation of 634 feet (193 m). Its runway, 8/26, is 4,900 by 75 feet (1,494 x 23 m) asphalt. The runway has VOR/DME, GPS Instrument Approaches and Pilot Controlled Lighting. Airport services include a fixed-base operator (FBO) and flight school from Griffith Aviation, full service maintenance from Great Northern and custom engine overhauls from G & N Aircraft. Both 100LL gas and Jet A fuel are available. In the year ending August 23, 2006 the airport had 33,699 aircraft operations, average 92 per day: 99% general aviation and 1% air taxi. In 2015, 71 aircraft were based at the airport: 48 single-engine, 15 multi-engine, 1 jet and 7 helicopters. In December 2023, it was announced that The Gary/Chicago International Airport Authority had acquired the airport previously owned by Griffith Aviation for $1.8 million.