Samoa Field Airport formerly Eureka Municipal Airport (FAA LID: O33) is a city-owned, public airport 2 miles (3.2 km) west of Eureka, on the northern peninsula of Humboldt Bay in Humboldt County, California, United States.

[1] The airport covers 657 acres (266 ha) and is about 20 feet (6.1 m) above sea level.

In the year ending December 3, 2004 the airport had 5,000 aircraft operations, an average of 13 per day.

Eighteen aircraft were then based at the airport: 89% single-engine and 11% ultralight.

Humboldt Bay Social Club is located near the Airport and offers Bar and Restaurant, Vacation rentals, hotel suites and event spaces.