Menlo Park (/ˈmɛnloʊ/ MEN-loh) is a city at the eastern edge of San Mateo County in the San Francisco Bay Area of California, United States. It is bordered by San Francisco Bay on the north and east; East Palo Alto, Palo Alto, and Stanford to the south; and Atherton, North Fair Oaks, and Redwood City to the west. It had 33,780 residents at the 2020 United States census. It is home to the corporate headquarters of Meta, and is where Google, Roblox Corporation, and Round Table Pizza were founded. The train station holds the record as the oldest continually operating train station in California. It is one of the most educated cities in California and the United States; nearly 70% of residents over 25 have earned a bachelor's degree or higher.

"Menlo" is derived from Menlo (the anglicized spelling of Irish Gaelic 'Mionloch', meaning 'small lake') in County Galway, Ireland. The name "Menlo Park" was given to a ranch purchased by Irish settlers in honor of their home village in Ireland.

The area of Menlo Park was inhabited by the Ohlone people when the Portolá expedition arrived in 1769.

In 1795, the Rancho de las Pulgas Spanish land grant was made that included the area of the current city.

In 1851, two Irish immigrants, Dennis J. Oliver and his brother-in-law, D.C. McGlynn, purchased a 1,700-acre (690 ha) tract of land on the former Rancho de las Pulgas. In 1854, they erected a gate with a wooden arch bearing the inscription "Menlo Park" and the date "August 1854" at the entrance to their property (now the intersection of Middle Ave and El Camino Real). The word "Menlo" derived from the owners' former home of Menlo (or Menlough) in County Galway, Ireland, and is an anglicized version of the original Irish name of the place, Mionloch, meaning "middle lake".

In 1863, the San Francisco and San Jose Rail Road had built the railroad from San Francisco to as far as Mayfield (now California Avenue station in Palo Alto) and started running trains to the area. They named a nearby station "Menlo Park" after the sign. The 1867 station building still stands on the platform of the current Caltrain station, used by the local Chamber of Commerce. It holds the record as the oldest, continually operating train station in California. The town of Menlo Park grew up around this station, becoming a popular home for San Francisco businessmen. A post office was established in 1870, and the city was incorporated in 1874 (it dissolved after two years, but later was permanently incorporated in 1927). The original arch, which gave its name to the stations and ultimately, the city, survived until 1922, when it was destroyed in an automobile accident. The origin of the name of Menlo Park, California (c. 1850) antedates any work done by Thomas Edison (c. 1876) in Menlo Park, New Jersey; Menlo Park, New Jersey, was named after Menlo Park, California, as was Menlo, Washington.

In 1917–18, a large portion of Menlo Park was the site of Camp Fremont, a training camp for, at its height, 27,000 men being sent to fight in World War I. It did not last long (the camp was dismantled after the war), but army engineers paved the first streets in Menlo Park and laid the first water and gas lines. The army did retain the camp hospital, and it is now the site of a Veterans Administration Hospital off of Willow Road in Menlo Park. In the autumn of 1918, a flu pandemic hit Camp Fremont and killed 147.

At the start of World War II, the US government bought the 260-acre (110 ha) estate of Timothy Hopkins from his widow and created the Palo Alto General Hospital, later renamed the Dibble General Hospital (after Colonel John Dibble, who was killed in 1943). After the war ended, some of the land was sold to the city and became the sites of the main library and city hall. More of the land was bought by Stanford University to house the increase in students due to the G.I. Bill; the area was known as the "Stanford Village", which existed as student housing until the mid-1960s. This land also was the site of the Stanford Research Institute (now SRI International) starting in 1947; between 1955 and 1968, SRI bought the rest of the Stanford Village.

Sunset magazine moved to its headquarters in Menlo Park in 1951, designed by architect, Cliff May, with a similar layout to a California ranch-style house. Sunset referred to its Menlo Park headquarters as the Laboratory of Western Living.

In the 1960s, the former 600-acre (240 ha) estate of Frederick W. Sharon (1859–1914) (son of Senator William Sharon) and his wife, Louise Tevis Breckinridge Sharon (1858–1938; daughter of Lloyd Tevis and divorced wife of John Witherspoon Breckinridge), in the hills of south west Menlo Park was developed and called "Sharon Heights".

The development of leading Internet search engine provider Google occurred in 1998 in the garage in a Menlo Park home owned by Susan Wojcicki. Wojcicki's Menlo Park garage was used as the office for Google co-founders Larry Page and Sergey Brin for $1,700 a month.

In 2015, the Menlo Park Historical Association (MPHA) began a project to raise funds for and build a replica of the original Menlo Park gates. The chosen site was at 800 Alma Street in front of the Menlo Park public library. The replica was completed in 2019. On March 17, 2019, Menlo Park Mayor Ray Mueller officially dedicated the reproduction of the Menlo Gates.

According to the United States Census Bureau, the city has a total area of 17.4 square miles (45 km), of which 9.8 square miles (25 km) are land and 7.6 square miles (20 km) are covered by water. Menlo Park is long and narrow on a northeast to southwest axis. The northeast portion borders the San Francisco Bay and includes the Dumbarton Bridge that connects Menlo Park to Fremont on the east side of the bay. The city shoreline includes the city's largest park, Bedwell Bayfront Park (160 acres; 65 ha) and the Don Edwards San Francisco Bay National Wildlife Refuge. San Francisquito Creek marks much of the southeast border of the city. West Menlo Park (unincorporated area) along Alameda de las Pulgas nearly separates the southwestern part of the city (known as Sharon Heights) from the rest. The extreme southwest is clipped by Interstate 280.

The Bayshore Freeway (part of U.S. Route 101) traverses Menlo Park northwest to southeast near the shoreline and somewhat parallel to the Bayshore Freeway to the southwest is El Camino Real. The intersection of El Camino Real and Santa Cruz Avenue is considered the heart of the city. Nearby, the Menlo Park Civic Center is bounded by Ravenswood Avenue, Alma Street, Laurel Street, and Burgess Drive. It contains the council offices, library, police station, and Burgess Park, which has various recreational facilities. Other major roads include Sand Hill Road in the Sharon Heights area.

The residential areas of Menlo Park can be unofficially divided into several neighborhoods. From "east" (northeast toward San Francisco Bay) to "west" (southwest toward the Pacific Coast), they are defined by the Palo Alto Weekly as: Belle Haven is the only neighborhood east of Route 101; much of the rest of that area is business or protected land. Between 101 and the roughly parallel Middlefield Road are the neighborhoods of the Willows, Suburban Park, Lorelei Manor, Flood Triangle, Vintage Oaks, and South of Seminary (the seminary being Saint Patrick's Seminary). Between Middlefield and El Camino Real are the Caltrain track and Felton Gables, Linfield Oaks, and Park Forest. West of El Camino until the foothills of the Peninsula are the neighborhoods of Downtown Menlo Park, Central Menlo Park, and Allied Arts (sometimes also known as Stanford Park, it is named for the Allied Arts Guild in it). In the hills are Sharon Heights and Stanford Hills. Several other neighborhoods are closely associated with Menlo Park but are actually in unincorporated San Mateo county; these include Menlo Oaks and Fair Oaks (latter part of the North Fair Oaks census area) between Bayshore and Middlefield, University Heights (also known as West Menlo Park) between Sharon Heights and most of the rest of the city, and Stanford Weekend Acres, which is somewhat near Stanford Hills.

Historical population

Census	Pop.	Note	%±
1930	2,254		—
1940	3,258		44.5%
1950	13,587		317.0%
1960	26,957		98.4%
1970	26,826		−0.5%
1980	26,438		−1.4%
1990	28,040		6.1%
2000	30,785		9.8%
2010	32,026		4.0%
2020	33,780		5.5%
U.S. Decennial Census

Menlo Park, 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 2010	Pop 2020	% 2010	% 2020
White alone (NH)	19,841	18,575	61.95%	54.99%
Black or African American alone (NH)	1,482	1,001	4.63%	2.96%
Native American or Alaska Native alone (NH)	43	26	0.13%	0.08%
Asian alone (NH)	3,132	5,764	9.78%	17.06%
Pacific Islander alone (NH)	446	364	1.39%	1.08%
Other race alone (NH)	73	156	0.23%	0.46%
Mixed race or Multiracial (NH)	1,107	1,905	3.46%	5.64%
Hispanic or Latino (any race)	5,902	5,989	18.43%	17.73%
Total	32,026	33,780	100.00%	100.00%

The 2010 United States Census reported that Menlo Park had a population of 32,026. Its population density was 3,271.3 inhabitants per square mile (1,263.1/km). The racial makeup of Menlo Park was 22,494 (70.2%) White, 1,551 (4.8%) African American, 156 (0.5%) Native American, 3,157 (9.9%) Asian, 454 (1.4%) Pacific Islander, 2,776 (8.7%) from other races, and 1,438 (4.5%) from two or more races. Hispanics or Latinos of any race were 18.4% of the population, most of whom (4,303) were of Mexican ancestry.

The Census reported that 31,181 people (97.4% of the population) lived in households, 599 (1.9%) lived in noninstitutionalized group quarters, and 246 (0.8%) were institutionalized.

Of the 12,347 households, 33.3% had children under the age of 18 living in them, 49.9% were opposite-sex married couples living together, 8.4%had a female householder with no husband present, and 3.0% had a male householder with no wife present. About 5.2% were unmarried opposite-sex partnerships, and 0.8% were same-sex married couples or partnerships. About 29.7% were made up of individuals, and 11.1% had someone living alone who was 65 years of age or older. The average household size was 2.53. The average family size was 3.20.

In terms of age, 7,805 residents (24.4%) were under the age of 18, 1,817 people (5.7%) aged 18 to 24, 9,563 people (29.9%) aged 25 to 44, 8,263 people (25.8%) aged 45 to 64, and 4,578 people (14.3%) were 65 years of age or older. The median age was 38.7 years. For every 100 females, there were 93.7 males. For every 100 females age 18 and over, there were 91.5 males.

The 13,085 housing units averaged 1,336.6 units per square mile (516.1 units/km), of which 6,927 (56.1%) were owner-occupied, and 5,420 (43.9%) were occupied by renters. The homeowner vacancy rate was 1.1%; the rental vacancy rate was 5.2%; 18,972 people (59.2% of the population) lived in owner-occupied housing units and 12,209 people (38.1%) lived in rental housing units.

As of the census of 2009, there were 33,690 people, 12,543 households, and 7,248 families residing in the city. The population density was 3,441.3 inhabitants per square mile (1,328.7/km). There were 14,026 housing units at an average density of 1,432.7 units per square mile (553.2 units/km). 64.2% spoke English, 19.5% Spanish, other Indo-European 4.2%, 4.6% Chinese or Mandarin, and other language 0.7%, as their first language from estimate census 2009.

There were 12,543 households, out of which 25.8% had children under the age of 18 living with them, 41.5% were married couples living together, 10.8% had a female householder with no husband present, and 45.67% were non-families. 35.1% of all households were made up of individuals, and 11.1% had someone living alone who was 65 years of age or older. The average household size was 2.46 and the average family size was 3.15.

In the city, the population was spread out, with 25.8% under the age of 18, 9.1% from 18 to 24, 31.5% from 25 to 44, 20.4% from 45 to 64, and 14.2% who were 65 years of age or older. The median age was 32 years. For every 100 females, there were 94.0 males. For every 100 females age 18 and over, there were 90.6 males.

As of the 2000 estimate census, the median income for a household in the city was $82,609. Males had a median income of $77,766 versus $59,101 for females. The per capita income for the city was $51,341. About 5.9% of families and 7.3% of the population were below the poverty line, including 9.8% of those under age 18 and 8.7% of those over age 64. As of 2009 the median income for a family was $123,251.

City Council members are elected in districts to staggered four-year terms, in nonpartisan municipal elections every two years.

On the San Mateo County Board of Supervisors, Menlo Park is split between Supervisorial District 3 (west of El Camino Real) and Supervisorial District 4 (east of El Camino Real), currently represented by Ray Mueller and Warren Slocum, respectively.

In the California State Legislature, Menlo Park is in the 13th Senate District, represented by Democrat Josh Becker, and is split between the 21st Assembly District, represented by Democrat Diane Papan and the 23rd Assembly District, represented by Democrat Marc Berman.

In the United States House of Representatives, East Palo Alto is in California's 16th congressional district, represented by Democrat Anna Eshoo.

According to the California Secretary of State, as of February 10, 2019, Menlo Park has 19,339 registered voters—9,984 (51.6%) of whom are registered Democrats, 2,989 (15.5%) registered Republicans, and 5,683 (29.4%) undeclared.

Mayors of Menlo Park, California

Image Mayor Years Notes Alfred E. Blake 1927–1928 First mayor of Menlo Park Harry Weeden 1928–1929 F.C. Ellis 1929–? ? Charles Burgess 1945–1953 Michael Belangie 1953–1954 Charles Burgess 1954–1957 William Lawson 1957–1969 Ira Bonde 1969–1976 In 1976, the City Council limited mayors from serving consecutive one-year terms. Image Mayor Years Notes James Calloway 1977 ? 1978 James Bloch 1979 Douglas Dupen 1980 Billy Ray White 1981 First African-American mayor Peg Gunn 1982 First woman mayor Billy Ray White 1983 Peg Gunn 1984 Jack Morris 1985 Billy Ray White 1986 Ted Sorensen 1987 ? 1988 ? 1989 Gerald Grant 1990 Ted Sorensen 1991 Jack Morris 1992 ? 1993 Bob McNamara 1994 Raymond "Dee" Tolles 1995 Bob Burmeister 1996 Steve Schmidt 1997 Charles Kinney 1998 Paul Collacchi 1999 Mary Jo Borak 2000 Nicholas Jellins 2001 Steve Schmidt 2002 Nicholas Jellins 2003 Lee B. Duboc 2004 Mickie Winkler 2005 Nicholas Jellins 2006 Kelly Fergusson 2007 Andy Cohen 2008 Heyward Robinson 2009 Richard Cline 2010 Kelly Fergusson x Appointed December 7, 2010 Resigned December 10, 2010, due to Brown Act violations after separately soliciting three councilmembers to appoint her to the position Richard Cline 2011 Kirsten Keith 2012 Peter Ohtaki 2013 Ray Mueller 2014 Catherine Carlton 2015 Richard Cline 2016 Kirsten Keith 2017 Peter Ohtaki 2018 Ray Mueller 2019 Cecilia Taylor 2020 Drew Combs 2021 Betsy Nash 2022 Jen Wolosin 2023 Cecilia Taylor 2024

For primary schools, the central portions of Menlo Park are served by the Menlo Park City School District, while the Belle Haven neighborhood and VA hospital are served by the Ravenswood City School District, and the Sharon Heights and Stanford Hills neighborhoods served by the Las Lomitas Elementary School District. For high school, Menlo Park is part of the Sequoia Union High School District, with all of the city falling into the boundaries of Menlo-Atherton High School; some areas of the city have the option to attend Woodside High School.

Private elementary schools include two Catholic parochial schools, St. Raymond Catholic Elementary School and Nativity Elementary School; the Episcopalian Trinity School; Phillips Brooks School, pre-kindergarten to 5th grade; and Peninsula School, from kindergarten to 8th grade.

The Willows Campus of the private K–12 Silicon Valley International School, formerly known as German-American International School and Alto International School, is also in the city. Menlo School, a private middle and high school, is in Atherton on the border with Menlo Park. Sacred Heart School, Atherton, a Catholic middle and high school, is also in Atherton on the border with Menlo Park.

For higher education, Saint Patrick's Seminary and University is a Catholic seminary in Menlo Park.

There are two libraries, the Main branch and the Belle Haven branch. As part of the Peninsula Library System, they share many resources with other nearby libraries.

Much of Menlo Park's economy revolves around the companies on Sand Hill Road, consisting of venture capital, private equity, financial services, law firms, and other professional service companies and investment vehicles focusing on technology. Geron, Katerra, Robert Half International, Exponent, and SRI International are among the companies based in Menlo Park. Meta Platforms moved its headquarters to the former campus of Sun Microsystems in Menlo Park in December 2011.

In 2012, Meta (then known as Facebook) announced it would be Menlo Park's biggest employer, with 6,600 employees. According to the city's 2023 annual comprehensive financial report, the city's top employers were:

#	Employer	# of Employees
1	Meta	16,586
2	SRI International	710
3	Grail	497
4	Pacific Biosciences	320
5	United Parcel Service	295
6	SHR Hotel, LLC	252
7	Exponent	250
8	City of Menlo Park	245
9	Personalis	239
10	Safeway	226

Santa Cruz Avenue runs as the "Main Street" within Menlo Park; terminates at El Camino Real which runs concurrently with California State Route 82. The city is also the western end of the Dumbarton Bridge, which connects Menlo Park with the East Bay city of Fremont; the Menlo Park end is located immediately adjacent to Meta Platforms' headquarters. The city is flanked by U.S. Route 101 on its eastern end and by Interstate 280 on its western end.

Menlo Park's transit is primarily served by its eponymous train station, served by Caltrain. SamTrans is the primary provider of bus transport throughout the city. Menlo Park's eastern ends were previously considered for a short-lived BART extension along the Bayshore Freeway.

BART and Caltrain are also the primary transit modes for Menlo Park's connections to the San Francisco Bay Area's airports. Menlo Park is located about halfway between San Francisco International Airport and San Jose International Airport; the former can be accessed by using Caltrain and either BART's Red, or Yellow Line during 3-line service, or SamTrans route 292 (both connecting to Caltrain at Millbrae station), while the latter connects to Menlo Park through Caltrain and VTA services through a transfer at Diridon station. Drivers to and from Menlo Park can connect to both San Jose and San Francisco airports through using US 101. Oakland Airport is the farthest of the three major Bay Area airports from Menlo Park, with drivers having to cross the Bay through one of the three bridges across it, and transit users needing to use either the Dumbarton Express, SamTrans, or Caltrain to connect to BART services..

• Bizen, Japan
• Galway, Ireland
• Kochi, India

• Holy Cross Cemetery (Menlo Park, California)
• Menlo Park, New Jersey
• Menlo Park (Pretoria, South Africa)
• The Almanac (Menlo Park)
• Ravenswood Post (Menlo Park, California)

• City of Menlo Park official website
• Menlo Park Chamber of Commerce
• Menlo Park Library
• Menlo Park Historical Association