Oceanside Municipal Airport, also known as the Bob Maxwell Memorial Field (IATA: OCN, ICAO: KOKB, FAA LID: OKB), is a public airport in Oceanside, California, United States. It is located two miles (3 km) northeast of the downtown Oceanside, between California State Route 76 and the San Luis Rey River bike path. The airport covers 43 acres (170,000 m) and has one runway. It is mostly used for general aviation. The airport is operated and managed by Airport Property Ventures.

Although most U.S. airports use the same three-letter location identifier for the FAA and IATA, Oceanside Municipal Airport is assigned OKB by the FAA and OCN by the IATA. The airport's ICAO identifier is KOKB. The FAA identifier OCN belongs to the Oceanside VORTAC 4 miles west-northwest of the Oceanside Airport.

• Resources for this airport:
  • FAA airport information for OKB
  • AirNav airport information for KOKB
  • ASN accident history for OCN
  • FlightAware airport information and live flight tracker
  • NOAA/NWS weather observations: current, past three days
  • SkyVector aeronautical chart, Terminal Procedures