Capitol Airport (FAA LID: 02C) is a public use airport located three nautical miles (6 km) east of the central business district of Brookfield, a city in Waukesha County, Wisconsin, United States.

It is included in the Federal Aviation Administration (FAA) National Plan of Integrated Airport Systems for 2025–2029, in which it is categorized as a regional reliever airport facility.

[2] Capitol Airport covers an area of 207 acres (84 ha) at an elevation of 844 feet (257 m) above mean sea level.

For the 12-month period ending July 22, 2022, the airport had 13,010 aircraft operations, an average of 36 per day: 99% general aviation and less than 1% military.

In August 2024, there were 116 aircraft based at this airport: 107 single-engine, 2 multi-engine, 1 jet and 6 helicopter.