Waukegan National Airport (IATA: UGN, ICAO: KUGN, FAA LID: UGN) is a public airport in Waukegan, in Lake County, Illinois. The airport is 40 miles (64 km) north of Chicago. It was originally Waukegan Memorial Airport. It has been operated by the Waukegan Port District since 1956. In January 2014 under a FAA reclassification of many small airports, the airport was renamed Waukegan National Airport

The FAA's National Plan of Integrated Airport Systems for 2009–2013, categorized it as a reliever airport for Chicago O'Hare International Airport. Runway upgrades began in 2022.

During the 2020 Kenosha unrest, US President Donald Trump flew into Waukegan on his way to assess the damage in Kenosha, Wisconsin.