Monterey County is a county on the Pacific coast of the U.S. state of California, its northwestern section forming the southern half of Monterey Bay. The population of the county in 2021 was 437,325. The coastline of Monterey County includes Big Sur, Highway 1, and the scenic 17 Mile Drive in Pacific Grove and Carmel that traces the perimeter of the Monterey Peninsula. Tourism is an important part of the economy in the coastal regions of Monterey county, although agriculture is more dominant in the inland Salinas Valley.