Rockport is a former settlement in an unincorporated area of Mendocino County, California. It is located 7.25 miles north-northwest of Westport, at an elevation of 30 feet. Rockport started as a small company town serving the timber industry on the Pacific Ocean coast among redwood forests in Northern California. Rockport is regarded as the southern end of the …Rockport is a former settlement in an unincorporated area of Mendocino County, California. It is located 7.25 miles north-northwest of Westport, at an elevation of 30 feet. Rockport started as a small company town serving the timber industry on the Pacific Ocean coast among redwood forests in Northern California. Rockport is regarded as the southern end of the Lost Coast region; it is where State Highway 1, which runs very close along the coast for most of its length, instead turns inland before merging with U.S. Route 101 at Leggett.