Middleton Field (ICAO: KGZH, FAA LID: GZH, formerly 39J) is a public-use airport located 5 nautical miles (9.3 km; 5.8 mi) west of the central business district of Evergreen, a city in Conecuh County, Alabama, United States.

[1] According to the FAA's National Plan of Integrated Airport Systems for 2009–2013, it is categorized as a general aviation facility.

[4] Middleton Field covers an area of 200 acres (81 ha) which contains two asphalt paved runways (1/19 and 10/28) each measuring 4,000 by 150 ft (1,219 by 46 m).

For the 12-month period ending June 25, 2007, the airport had 134,005 aircraft operations, an average of 367 per day: 96% military and 4% general aviation.

Barbara Allen Rainey, the U.S. Navy's first female pilot, and her student were killed in a crash while practicing touch-and-go landings at Middleton Field.