Santa Clara (/ˌsæntə ˈklærə/ SAN-tə KLARR-ə; Spanish for "Saint Clare") is a city in Santa Clara County in the state of California. The city's population was 127,647 at the 2020 census, making it the eighth-most populous city in the Bay Area. Located in the southern Bay Area, the city was founded by the Spanish in 1777 with the establishment of Mission Santa Clara de Asís under the leadership of Junípero Serra.

Santa Clara is located in the center of Silicon Valley and is home to the headquarters of companies such as Intel, Advanced Micro Devices, and Nvidia. It is also home to Santa Clara University, the oldest university in California, and Levi's Stadium, the home of the National Football League's San Francisco 49ers, and Six Flags Entertainment Corporation's California's Great America Park. Santa Clara is bordered by San Jose on all sides, except for Sunnyvale and Cupertino to the west.

Prior to the arrival of Europeans in the 18th century, the Tamien tribe of the Ohlone nation of Indigenous Californians had inhabited the area for several millennia.

The first European to visit the valley was José Francisco Ortega in 1769. The Spanish began to colonize California with 21 missions, and the Mission Santa Clara de Asís was founded in 1777.

The Battle of Santa Clara, one of the last battles of the Conquest of California, was fought between a contingent of Californios, led by Francisco Sánchez, against the invading American forces.

In 1851, Santa Clara College was established on the grounds of the original Mission. In 1852, Santa Clara was incorporated as a town; it became state-chartered by 1862.

For the next century, the economy centered on agriculture since orchards and vegetables were thriving in the fertile soil. By the beginning of the 20th century, the population had reached 5,000 and stayed about the same for many years.

In 1905, the first public high-altitude flights by humans were made over Santa Clara in gliders designed by John J. Montgomery. The semiconductor industry, which sprouted around 1960, changed the city and surrounding Valley of Heart's Delight; little of its agricultural past remains.

Santa Clara's first medical hospital was built in 1963. This structure, on Kiely Boulevard, was replaced in 2007 with a new Kaiser Permanente medical center located on Lawrence Expressway at Homestead Road.

Santa Clara was also home to a major mental health facility, Agnews State Hospital. According to the National Park Service, more than 100 persons were killed at this site in the 1906 earthquake. The site is the former home to Sun Microsystems and is listed in the National Register of Historic Places.

In 1963, Santa Clara City Council voted to knock down the eight-block grid of Downtown Santa Clara, in order to receive federal funding for urban renewal. Since 2017, there has been a grassroots movement to rebuild Santa Clara's historic downtown.

Santa Clara is drained by three seasonal creeks, all of which empty into the southern portion of San Francisco Bay; these creeks are San Tomas Aquino Creek, Saratoga Creek, and Calabazas Creek.

There are some significant biological resources within the city including habitat for the burrowing owl, a species of special concern in California due to reduction in habitat from urban development during the latter 20th century. This owl uses burrows created by ground squirrels and prefers generally level grasslands and even disturbed areas. Coyotes have also become active in the area in recent years.

According to the U.S. Census Bureau, the city covers an area of 18.4 square miles (48 km), all of it land.

The average daily temperatures in July range from 82 °F (28 °C) to 53 °F (12 °C). Winters are mild, with the mean daily temperatures in January ranging from 58 °F (14 °C) to 38 °F (3 °C). Most of the annual rainfall comes in the winter months; the summer months are generally rainless.

Historical population

Census	Pop.	Note	%±
1880	2,416		—
1890	2,891		19.7%
1900	3,650		26.3%
1910	4,348		19.1%
1920	5,220		20.1%
1930	6,302		20.7%
1940	6,650		5.5%
1950	11,702		76.0%
1960	58,880		403.2%
1970	86,118		46.3%
1980	87,700		1.8%
1990	93,613		6.7%
2000	102,361		9.3%
2010	116,468		13.8%
2020	127,647		9.6%
U.S. Decennial Census

Santa Clara, California – Racial and ethnic composition
Note: the US Census treats Hispanic/Latino as an ethnic category. This table excludes Latinos from the racial categories and assigns them to a separate category. Hispanics/Latinos may be of any race.

Race / Ethnicity (NH = Non-Hispanic)	Pop 2000	Pop 2010	Pop 2020	% 2000	% 2010	% 2020
White alone (NH)	49,392	42,026	35,930	48.25%	36.08%	28.15%
Black or African American alone (NH)	2,237	2,929	2,713	2.19%	2.51%	2.13%
Native American or Alaska Native alone (NH)	275	240	186	0.27%	0.21%	0.15%
Asian alone (NH)	29,791	43,531	59,678	29.10%	37.38%	46.75%
Pacific Islander alone (NH)	416	604	390	0.41%	0.52%	0.31%
Other race alone (NH)	275	321	797	0.27%	0.28%	0.62%
Mixed race or Multiracial (NH)	3,611	4,228	5,403	3.63%	3.63%	4.23%
Hispanic or Latino (any race)	16,364	22,589	22,550	15.99%	19.40%	17.67%
Total	102,361	116,468	127,647	100.00%	100.00%	100.00%

The 2010 United States census reported that Santa Clara had a population of 116,468. The population density was 6,327.3 inhabitants per square mile (2,443.0/km). The ethnic makeup of Santa Clara was 52,359 (45.0%) White, 3,154 (2.7%) African American, 579 (0.5%) Native American, 43,889 (37.7%) Asian (13.6% Indian, 6.9% Chinese, 6.2% Filipino, 3.9% Vietnamese, 3.0% Korean, 1.5% Japanese), 651 (0.6%) Pacific Islander, 9,624 (8.3%) from other races, and 6,212 (5.3%) from two or more races. There were 22,598 people (19.4%) who identified as Hispanic or Latino; 14.6% of Santa Clara's population was of Mexican ancestry.

The Census reported that 113,272 people (97.3% of the population) lived in households, 2,860 (2.5%) lived in non-institutionalized group quarters, and 336 (0.3%) were institutionalized.

There were 43,021 households, out of which 14,477 (33.7%) had children under the age of 18 living in them, 21,817 (50.7%) were opposite-sex married couples living together, 4,081 (9.5%) had a female householder with no husband present, 2,038 (4.7%) had a male householder with no wife present. There were 2,146 (5.0%) unmarried opposite-sex partnerships, and 312 (0.7%) same-sex married couples or partnerships. 10,906 households (25.4%) were made up of individuals, and 2,945 (6.8%) had someone living alone who was 65 years of age or older. The average household size was 2.63. There were 27,936 families (64.9% of all households); the average family size was 3.18.

The age distribution of the population was as follows: 24,774 people (21.3%) were under the age of 18, 12,511 people (10.7%) aged 18 to 24, 41,876 people (36.0%) aged 25 to 44, 25,628 people (22.0%) aged 45 to 64, and 11,679 people (10.0%) who were 65 years of age or older. The median age was 34.1 years. For every 100 females, there were 102.0 males. For every 100 females age 18 and over, there were 100.9 males.

There were 45,147 housing units at an average density of 2,452.7 units per square mile (947.0 units/km), of which 19,747 (45.9%) were owner-occupied, and 23,274 (54.1%) were occupied by renters. The homeowner vacancy rate was 1.3%; the rental vacancy rate was 4.6%. 53,694 people (46.1% of the population) lived in owner-occupied housing units and 59,578 people (51.2%) lived in rental housing units.

Santa Clara owns and operates an electric utility called Silicon Valley Power. In 2005 Silicon Valley Power brought online the Donald Von Raesfeld (DVR) Power Plant. The new combined cycle gas turbine plant produces 147 megawatts of electricity for the city and its residents. As a result, the going rate for electricity in Santa Clara is considerably cheaper than that offered by Northern California's dominant utility, Pacific Gas and Electric.

Advanced Micro Devices (AMD), Affymetrix, Agilent Technologies, Applied Materials, Arista Networks, Aruba, Auditoria.AI, Brillio, Chegg, Cloudera, Coherent, FileMaker, Hortonworks, Infoblox, Intel, Intevac, Marvell, McAfee, Move inc, National Semiconductor, Nvidia, OmniVision, Ooyala, Palo Alto Networks, Rovi, ServiceNow, SVB Financial Group, Trident Microsystems and Veritas Technologies are among the companies headquartered in Santa Clara. The North American offices of Bandai Namco Entertainment (formerly Namco) was in Santa Clara until its consolidation with its existing offices in Irvine, California.

According to the city's 2022 Annual Comprehensive Financial Report, the top employers in the city are:

#	Employer	# of employees
1	Applied Materials	8,500
2	Intel	7,801
3	AMD	3,000
4	California's Great America	2,500
5	Nvidia	2,500
6	Dell	2,088
7	Santa Clara University	2,000
8	City of Santa Clara	1,752
9	SVB Financial Group	1,250
10	Macy's	1,200

The current mayor of Santa Clara is Lisa M. Gillmor. Its city councilmembers are: Kathy Watanabe (District 1), Raj Chahal (District 2), Karen Hardy (District 3), Kevin Park (District 4), Suds Jain (District 5), and Anthony Becker (District 6). Santa Clara is represented in California's 17th congressional district for the U.S. House of Representatives, currently represented by Ro Khanna (D).

In the California Legislature, Santa Clara is part of California's 10th State Senate district and California's 26th State Assembly district, represented in the Senate by Aisha Wahab (D) and in the Assembly by Patrick Ahrens (D).

The city operates the Santa Clara City Library, which is not part of the Santa Clara County Library District.

Santa Clara Unified School District is the public school district that serves Santa Clara and small portions of Sunnyvale and North San Jose. The city is home to nineteen K–8, elementary, and high schools. Many of the schools are named for former farmers, ranchers, and other notable Santa Clara residents such as Bowers and Bracher elementary schools, Buchser Middle School, Wilcox High School, Santa Clara High School, and Mission Early College High School.

A small part of the city however is served by Cupertino High School and its feeder schools in the nearby town of its namesake.

Private schools in Santa Clara include three Catholic schools operated by the Roman Catholic Diocese of San Jose — Saint Clare School (the oldest elementary school in California), Saint Lawrence Elementary and Middle School, and Saint Justin School — and the Granada Islamic School (Islamic school, grades K-12).

Colleges and universities in Santa Clara include Santa Clara University (private Jesuit university), Mission College (public community college), UC Santa Cruz Silicon Valley extension campus, and Golden State Baptist College (private Baptist college).

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Santa Clara is also home to California's Great America, an amusement park currently operated by Cedar Fair, L.P.

Nearby is the Santa Clara Convention Center, one of Silicon Valley's largest event and meeting venues. Santa Clara also offers several museums such as the Intel Museum, Triton Museum of Art, and the Harris – Lass historical house. The Our Lady of Peace Shrine is notable for its 32-foot-tall (9.8 m) statue which is visible from Highway 101. The Mission City Center for Performing Arts is the city's venue for theatrical productions and entertainment.

The Santa Clara Broncos are the Division I NCAA athletic programs of Santa Clara University. Santa Clara sponsors 19 different teams, most of which compete in the West Coast Conference. The red and white of the Santa Clara Broncos is featured on the flag of the city, as is the Mission which lies at the heart of the campus.

The George F. Haines International Swim Center is home and host to numerous local, regional, and international competitive swimming matches.

The Santa Clara Vanguard, a competitive marching music organization, has been headquartered in Santa Clara since its inception. The organization runs and operates a winter guard, an indoor percussion ensemble, and two drum and bugle corps, all of which compete across the country every year. All four ensembles have been very successful competitively, especially the two drum corps, one of which has won 6 Open Class titles and the other 7 World Class titles.

The San Francisco 49ers National Football League football team has its headquarters and practice facilities in Santa Clara. On Wednesday, November 8, 2006, the 49ers announced their intention to move the team to Santa Clara in time for the fall 2014 season, after negotiations failed with the city of San Francisco to build a new stadium.

Santa Clara will host multiple matches during the 2026 FIFA World Cup at Levi's Stadium.

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Santa Clara has two major train stations: the Santa Clara – Great America station and the Santa Clara station. Both stations are served by Amtrak's Capitol Corridor train and the Altamont Corridor Express (ACE); the latter is also served by Caltrain.

The city is served by the VTA light rail system, which operates four stations: Reamwood station, Old Ironsides station, Great America station, and Lick Mill station.

Santa Clara is located adjacent to San Jose International Airport.

As of May 2015, Santa Clara has three sister cities:

• Coimbra, Portugal
• Izumo, Shimane, Japan
• Limerick, Ireland

• List of cities and towns in the San Francisco Bay Area

• Official website
• Santa Clara Convention and Visitors Bureau website
• Silicon Valley Central Chamber of Commerce, formally Santa Clara Chamber of Commerce website