Bay Area Beyond San Francisco: Explore 9 Counties in CA

The San Francisco Bay encircles 1,600 square miles of water and tidal flats surrounded by nine counties containing over 7.7 million residents as of the 2020 census. Oakland sits directly across the bay from San Francisco connected by the San Francisco-Oakland Bay Bridge which opened in 1936 and carries approximately 260,000 vehicles daily on its double-deck span measuring 4.5 miles. Oakland's port ranked eighth busiest container port in the United States in 2022 handling 2.4 million twenty-foot equivalent units and serving as the primary maritime gateway for Northern California cargo. The city incorporated in 1852 during the aftermath of the California Gold Rush and became the western terminus of the First Transcontinental Railroad in 1869 when the Central Pacific Railroad established its terminus and repair facilities there rather than in San Francisco due to flat accessible land. Oakland's population reached 440,646 in the 2020 census with demographic composition of 29.9 percent white, 21.8 percent Black or African American, 15.9 percent Asian, and 27.3 percent Hispanic or Latino of any race according to Census Bureau data.

Berkeley occupies 17.7 square miles north of Oakland along the eastern shore of San Francisco Bay and recorded a 2020 census population of 124,321 residents. The University of California Berkeley enrolled 45,307 students as of fall 2022 including 31,814 undergraduates and 13,493 graduate students across 14 colleges and schools on a 1,232-acre main campus. The university granted its first degrees in 1873 as the flagship campus of the University of California system established by the state legislature in 1868. Berkeley faculty and researchers have produced 114 Nobel laureates as of 2023 according to university records with 34 faculty members currently holding Nobel Prizes in their fields. The Lawrence Berkeley National Laboratory occupies 200 acres in the hills above campus operating as a Department of Energy facility where 16 chemical elements were discovered between 1940 and 1974 including berkelium element 97 and californium element 98. Berkeley passed the first municipal ban on natural gas in new buildings in 2019 affecting construction permits issued after January 2020 though the ruling faced legal challenges in federal court.

San Jose recorded 1,013,240 residents in the 2020 census making it the most populous city in the Bay Area and the tenth most populous city in the United States. The city covers 181.4 square miles in the Santa Clara Valley at the southern end of San Francisco Bay approximately 50 miles southeast of San Francisco. San Jose incorporated as California's first city in 1850 and served as the state capital from 1849 to 1851 before the legislature moved the capital to Vallejo and eventually Sacramento. The median household income in San Jose reached $115,893 in 2021 according to Census Bureau American Community Survey data ranking among the highest median incomes for major American cities. San Jose lies at the center of Silicon Valley where technology companies employed approximately 385,000 workers in Santa Clara County as of 2022 based on state employment data. Adobe Systems maintains its headquarters on Park Avenue with 3.3 million square feet of office space housing approximately 7,000 employees while Cisco Systems operates from San Jose with roughly 13,000 employees at its regional facilities. The San Jose International Airport handled 15.7 million passengers in 2019 before pandemic impacts reduced traffic to 4.7 million in 2020 with recovery to 12.5 million passengers in 2022.

Palo Alto encompasses 25.8 square miles on the San Francisco Peninsula with a 2020 census population of 68,572 residents. Stanford University occupies 8,180 acres adjacent to Palo Alto where the university enrolled 17,249 students as of fall 2022 including 7,761 undergraduates and 9,488 graduate students. Leland Stanford founded the university in 1885 in memory of his son Leland Stanford Jr. who died of typhoid fever at age 15 and the campus opened to students in 1891 with free tuition until 1920. Stanford's endowment reached 36.3 billion dollars as of 2023 making it the third-largest university endowment in the United States behind Harvard and Yale. The Hewlett-Packard Company started in a Palo Alto garage in 1939 when William Hewlett and David Packard began manufacturing audio oscillators with their first major customer being Walt Disney Studios which purchased eight oscillators for 71.50 dollars each to develop sound systems for Fantasia. Palo Alto enacted a residential growth control measure in 1973 limiting new housing development to 300 units annually though the cap was modified multiple times in subsequent decades as housing demand intensified.

Mountain View occupies 12 square miles with a 2020 census population of 82,376 residents located northwest of San Jose along Highway 101. Google established its headquarters complex called Googleplex in Mountain View in 2004 on a campus covering approximately 2 million square feet of office space expanded to roughly 3.1 million square feet by 2018. The company employed approximately 12,000 workers at the Mountain View campus as of 2020 though exact employee counts fluctuate with project demands and facility expansions. NASA Ames Research Center occupies 2,000 acres in Mountain View adjacent to Moffett Federal Airfield operating as a NASA field center since 1939 when the National Advisory Committee for Aeronautics took control of the facility. Hangar One at Moffett Field measures 1,133 feet long by 308 feet wide by 198 feet tall covering 8 acres of ground and was built in 1933 to house the USS Macon rigid airship before the airship crashed off the Big Sur coast in 1935 killing two crew members. The Computer History Museum in Mountain View holds approximately 90,000 objects in its collection including the Cray-1 supercomputer and an operating replica of Charles Babbage's Difference Engine No. 2 constructed from original 1840s designs.

Santa Clara incorporated in 1852 and recorded a 2020 census population of 127,647 residents on 18.4 square miles of land. Santa Clara University founded in 1851 operates as California's oldest continuously operating institution of higher education on a 106-acre campus enrolling approximately 9,000 students as of fall 2022. The Mission Santa Clara de Asís established in 1777 represents the eighth of 21 California missions founded by Spanish Franciscan missionaries along El Camino Real with the current mission church dating to 1928 after previous structures were destroyed by earthquakes and fire. Intel Corporation maintains its headquarters in Santa Clara employing roughly 20,000 workers in the area though the company does not break down employment by specific campus locations. Levi's Stadium opened in Santa Clara in 2014 as home to the San Francisco 49ers football team at a construction cost of 1.3 billion dollars with a capacity of 68,500 expandable to 75,000 for major events and the facility hosted Super Bowl 50 in 2016.

Fremont formed in 1956 through the consolidation of five smaller communities including Mission San Jose, Centerville, Niles, Irvington, and Warm Springs creating a city of 77.5 square miles. The 2020 census recorded 230,504 residents in Fremont with demographic composition of 13.5 percent white, 3.5 percent Black or African American, 63.3 percent Asian, and 13.5 percent Hispanic or Latino reflecting the highest percentage Asian population among major Bay Area cities. Tesla operated an assembly plant in Fremont from 2010 to present in a facility previously used by General Motors and Toyota as the NUMMI joint venture plant which employed 4,700 workers at its 1984 opening. The Tesla Fremont Factory occupies 5.3 million square feet of manufacturing space where the company produced approximately 430,000 vehicles in 2020 and expanded capacity to roughly 600,000 vehicles annually by 2022. Mission San José founded in 1797 served approximately 1,800 Native American converts by 1831 making it the most populous of the California missions though secularization in 1834 transferred mission lands to private ownership and the Native population dispersed. Ardenwood Historic Farm preserves a 205-acre Victorian-era farm in Fremont operating as a regional park demonstrating agricultural techniques from the 1870s through 1920s period when the Patterson family operated the property as a working farm.

Hayward recorded 162,954 residents in the 2020 census occupying 45.3 square miles of land east of San Francisco Bay. The Hayward Fault runs directly through the city representing the most active fault in the San Francisco Bay Area with geologic studies indicating a major earthquake magnitude 6.7 or greater has a 32 percent probability of occurring on this fault before 2043 according to United States Geological Survey hazard assessments. California State University East Bay enrolled 13,991 students as of fall 2022 on a 342-acre campus in the hills above Hayward established in 1957 as the third campus in the California State University system. The McConaghy House built in 1886 operates as the city's historical museum preserving a Victorian farmhouse structure from the period when Hayward served as a processing center for agricultural products grown in the East Bay region. The Hayward Shoreline Interpretive Center manages 1,713 acres of former salt ponds and tidal marshes along the eastern shore of San Francisco Bay where restoration projects begun in 2003 converted commercial salt production areas back to tidal marsh habitat supporting approximately 130 bird species documented by regional naturalist surveys.

Richmond occupies 56 square miles on the northeastern shore of San Francisco Bay with a 2020 census population of 116,448 residents. The city's shipyards operated by industrialist Henry J. Kaiser employed approximately 100,000 workers during World War II constructing 747 ships between 1940 and 1945 including 490 Liberty ships assembled using prefabrication techniques that reduced construction time from 230 days to an average of 42 days by 1944. The SS Robert E. Peary launched in November 1942 after only 4 days and 15.5 hours of construction from keel-laying to launch demonstrating peak efficiency of the Richmond shipyard operations. The Rosie the Riveter World War II Home Front National Historical Park established in 2000 preserves shipyard facilities and Ford Assembly Building structures commemorating the contributions of civilian workers particularly women who entered industrial jobs during wartime mobilization. The Richmond-San Rafael Bridge opened in 1956 connecting Richmond to Marin County across a 5.5-mile span carrying approximately 85,000 vehicles daily as of 2020 traffic counts. Point Richmond developed as a terminal for the Santa Fe Railroad in 1900 when the company established ferry service connecting Richmond to San Francisco and the historic downtown district preserves Victorian-era commercial buildings from the early 20th century development period.

Vallejo incorporated in 1868 and recorded 126,090 residents in the 2020 census on 49.5 square miles of land and water. The city served as California's state capital twice in 1852 and again from 1853 to 1854 before the legislature permanently relocated to Sacramento due to flooding and accessibility issues in Vallejo. Mare Island Naval Shipyard operated from 1854 to 1996 as the first United States Navy base on the Pacific Coast where 17 submarines and 4 fleet oilers were constructed during World War II employing a peak workforce of 50,000 civilian workers in 1944. The shipyard covered 5,600 acres and included dry docks, foundries, machine shops, and housing facilities for military and civilian personnel with closure in 1996 resulting in loss of approximately 10,000 direct jobs. The Mare Island Historic Park Foundation manages preservation of approximately 300 historic buildings and structures remaining from the naval shipyard period including officers' mansions, enlisted housing, and industrial facilities dating from the 1850s through 1990s.

Marin County encompasses 828 square miles north of the Golden Gate Bridge with a 2020 census population of 262,321 residents across incorporated cities and unincorporated areas. The Golden Gate Bridge completed in 1937 connects San Francisco to Marin County across a 1.7-mile span with towers rising 746 feet above water and a total bridge length of 8,980 feet including approaches. Approximately 112,000 vehicles crossed the bridge daily as of 2019 traffic counts with toll revenue of 162 million dollars collected in fiscal year 2019. Muir Woods National Monument protects 554 acres of old-growth coast redwood forest established as a national monument in 1908 after William Kent donated the land to prevent its development and requested it be named for naturalist John Muir. The tallest tree in Muir Woods measures 258 feet in height with some specimens estimated at 600 to 800 years old based on growth ring analysis. Point Reyes National Seashore preserves 71,028 acres of coastal wilderness on a peninsula extending into the Pacific Ocean where the Point Reyes Lighthouse constructed in 1870 sits 294 feet above sea level requiring visitors to descend 308 steps to reach the light station. The Point Reyes peninsula lies on the Pacific Plate west of the San Andreas Fault which runs through Tomales Bay and the 1906 San Francisco Earthquake caused approximately 20 feet of horizontal displacement visible at the earthquake trail on the Bear Valley section of the park.

Sausalito occupies 2.2 square miles along the northern shore of the Golden Gate with a 2020 census population of 7,068 residents. The city developed as a shipbuilding center during World War II when Marinship Corporation constructed 93 ships between 1942 and 1945 including Liberty ships and oil tankers employing approximately 20,000 workers at peak production. The Bay Model Visitor Center operates a 1.5-acre hydraulic scale model of San Francisco Bay and the Sacramento-San Joaquin Delta built by the United States Army Corps of Engineers in 1957 to study tidal flows and sedimentation patterns before computer modeling made the physical model obsolete for engineering purposes though it remains open as an educational facility. Sausalito's houseboat community numbers approximately 400 floating homes moored in Richardson Bay representing a residential population that grew from squatters and artists in the 1960s to a regulated community with dock leases and building permits. The median home value in Sausalito reached 2.1 million dollars in 2022 according to real estate data sources making it among the most expensive residential markets in the Bay Area.

San Rafael serves as Marin County's seat with a 2020 census population of 61,271 residents on 22.5 square miles. Mission San Rafael Arcángel founded in 1817 initially operated as a medical asistencia for San Francisco Mission providing a warmer climate for ill Native American converts before gaining full mission status in 1822 as the twentieth California mission. The current mission church structure dates to 1949 as a replica since the original mission buildings were demolished in the 1870s after secularization transferred the property to private ownership. San Rafael developed as a commercial center for Marin County with downtown retail and office districts serving surrounding communities and the San Rafael Transit Center provides bus connections to Golden Gate Transit routes carrying approximately 2.3 million passengers annually on routes connecting Marin County to San Francisco. San Quentin State Prison established in 1852 operates as California's oldest prison on 432 acres along the San Francisco Bay shore housing California's only death row for male inmates with a capacity of 3,776 prisoners though population fluctuates based on state corrections policies.