Winterset Municipal Airport (FAA LID: 3Y3) is a public use airport located two nautical miles (4 km) north of the central business district of Winterset, a city in Madison County, Iowa, United States.

[3] Winterset Municipal Airport covers an area of 33 acres (13 ha) at an elevation of 1,116 feet (340 m) above mean sea level.

It has one runway designated 14/32 with an asphalt surface measuring 3,002 by 50 feet (915 x 15 m).

[1] For the 12-month period ending September 25, 2020, the airport had 6,750 general aviation aircraft operations, an average of 129 per week.

At that time there were 23 aircraft based at this airport: 21 single-engine and 2 multi-engine.