Mulino State Airport (FAA LID: 4S9) is a public airport located at Mulino, Oregon, near the city of Molalla, about 20 nautical miles (23 mi, 37 km) south of Portland with easy access from Interstate 205 via Oregon Route 213. Also known as Mulino Airport, it was owned by the Port of Portland from 1988 until it was transferred to the Oregon Department of Aviation on July 1, 2009. It was previously also known as Portland-Mulino Airport.