Marcy Field (FAA LID: 1I1) is a public-use airport located two nautical miles (3.7 km) south of the central business district of Keene, a town in Essex County, New York, United States.

[1] The airport is situated on the west side of the Ausable River.

Marcy Field covers an area of 36 acres (15 ha) at an elevation of 985 feet (300 m) above mean sea level.

It has one runway designated N/S with a turf surface measuring 2,390 by 95 feet (728 x 29 m).

For the 12-month period ending May 20, 2010, the airport had 135 aircraft operations, an average of 11 per month: 89% general aviation and 11% military.