The Hatfield Marine Science Center (HMSC) is a marine science research and education center next to Yaquina Bay of the Pacific Ocean in the U.S. state of Oregon. It is operated by Oregon State University in cooperation with five state and federal agencies co-located on site. Named after Mark Hatfield, a former U.S. Senator from Oregon, the HMSC occupies a 49-acre (20 ha) site in Newport.