Nelson Lagoon Airport (IATA: NLG, ICAO: PAOU, FAA LID: OUL, formerly Z73) is a state-owned, public-use airport located one nautical mile (1.85 km) east of the central business district of Nelson Lagoon, in the Aleutians East Borough of the U.S. state of Alaska. Scheduled airline service to Cold Bay Airport is provided by Peninsula Airways (PenAir).

As per Federal Aviation Administration records, this airport had 290 commercial passenger boardings (enplanements) in calendar year 2008, a decrease of 4% from the 302 enplanements in 2007. Nelson Lagoon Airport is included in the FAA's National Plan of Integrated Airport Systems (2009-2013), which categorizes it as a general aviation facility.

Although most U.S. airports use the same three-letter location identifier for the FAA and IATA, this airport is assigned OUL by the FAA and NLG by the IATA (which assigned OUL to Oulu Airport in Oulu, Finland).