831 Area Code 🌍☎️

The most populous cities in area code 831 are: Salinas, Santa Cruz, Monterey, Watsonville, and Hollister.

Other cities in the 831 area code include: Aptos, King City, Ben Lomond, Carmel, Felton, Boulder Creek, Soledad, Greenfield, Tres Pinos, Gonzales, Big Sur, Scotts Valley, San Ardo, Castroville, Marina, San Juan Bautista, Chualar, Carmel Valley, Aromas, and Cantua Creek.

Salinas / s ə ˈ l iː n ə s / is the county seat and largest municipality of Monterey County, California. Salinas is located just outside the southern portion of the greater Bay Area and 10 miles (16 km) east-southeast of the mouth of the Salinas River, at an elevation of about 52 feet (16 m) above sea level. The population was 155,662 as of 2013 . The city is located at the mouth of the Salinas Valley roughly eight miles from the Pacific Ocean and has a climate more influenced by the ocean than the hot-summer interior. The city consists mostly of late 20th century single family homes and low-level apartments, ranging from modest bungalows to spacious luxury homes, and serves as the main business, governmental and industrial center of the region. The marine climate is ideal for the floral industry, grape vineyards, and vegetable growers. Salinas is known for its vibrant and large agriculture industry and as the hometown of writer and Nobel Prize in Literature laureate John Steinbeck, who based several of his novels there.

Santa Cruz is the county seat and largest city of Santa Cruz County, California. As of 2013 the U.S. Census Bureau estimated Santa Cruz's population at 62,864.Situated on the northern edge of Monterey Bay, about 32 mi (51 km) south of San Jose and 75 mi (120 km) south of San Francisco, the city is part of the 12-county San Jose-San Francisco-Oakland Combined Statistical Area.Santa Cruz is known for its moderate climate, the natural beauty of its coastline, redwood forests, alternative community lifestyles, and socially liberal leanings. It is also home to the University of California, Santa Cruz, a premier research institution and educational hub, as well as the Santa Cruz Beach Boardwalk, an oceanfront amusement park operating continuously since 1907.The present-day site of Santa Cruz was the location of Spanish settlement beginning in 1791, including Mission Santa Cruz and the pueblo of Branciforte. Following the Mexican–American War of 1846–48, California became the 31st state in 1850. The City of Santa Cruz was incorporated in 1866 and chartered in April 1876. Important early industries included lumber, gunpowder, lime and agriculture. Late in the 19th century, Santa Cruz established itself as a beach resort community.

Monterey in Monterey County is located on the southern edge of Monterey Bay, in the Northern Portion of California's Central Coast. It stands at an elevation of 26 feet (8 m) above sea level, on a land area of 8.466 sq mi (21.93 km 2). The 2010 census recorded a population of 27,810.Monterey was the capital of Alta California under both Spain and Mexico. It was the only port of entry for taxable goods in California. In 1846 the U.S. flag was raised over the Customs House, and California became part of the United States after the Mexican–American War.The city had California's first theater, public building, public library, publicly funded school, printing press, and newspaper. The city and surrounding area have attracted artists since the late 19th century and many celebrated painters and writers have lived there. Until the 1950s, there was an abundant fishery.Among Monterey's notable present-day attractions are the Monterey Bay Aquarium, Cannery Row, Fisherman's Wharf and the annual Monterey Jazz Festival.

The 831 area code lies within the Pacific Daylight Time Zone (or PDT). The current time in Pacific Daylight Time is 04:23 AM on Mar 10, 2026.