San Marino is a city in Los Angeles County, California, United States. It was incorporated on April 25, 1913. At the 2020 United States census the population was 12,513, a decline from the 2010 United States census.

The city takes its name from the ancient Republic of San Marino, founded by Saint Marinus who fled his home in Dalmatia (modern Croatia) at the time of the Diocletianic Persecution.

The seal of the City of San Marino, California is modeled on that of the republic, depicting the Three Towers of San Marino each capped with a bronze plume, surrounded by a heart-shaped scroll with two roundels and a lozenge (of unknown significance) at the top. The crown representing sovereignty on the original was replaced with five stars, representing the five members of the city's governing body. Beneath the city's seal are crossed palm fronds and orange branches.

The city celebrated its centennial in 2013, including publication by the San Marino Historical Society of a 268-page book, San Marino, A Centennial History, by Elizabeth Pomeroy. In September 2014, this book and author Elizabeth Pomeroy received a prestigious Award of Merit for Leadership in History from the American Association for State and Local History (AASLH).

The site of San Marino was originally occupied by a village of Tongva (Gabrieleño) Indians located approximately where the Huntington School is today. The area was part of the lands of the San Gabriel Mission. Principal portions of San Marino were included in an 1838 Mexican land grant of 128 acres to Victoria Bartolmea Reid, a Gabrieleña Indian. (After her first husband, also a Gabrieleño, died in 1836 of smallpox, she remarried Scotsman Hugo Reid in 1837). She called the property Rancho Huerta de Cuati. After Hugo Reid's death in 1852, Señora Reid sold her rancho in 1854 to Don Benito Wilson, the first Anglo owner of Rancho San Pascual. In 1873, Don Benito conveyed to his son-in-law, James DeBarth Shorb, 500 acres (2.0 km), including Rancho Huerta de Cuati, which Shorb named "San Marino" after his grandfather's plantation in Maryland, which, in turn, was named after the Republic of San Marino located on the Italian Peninsula in Europe.

In 1903, the Shorb rancho was purchased by Henry E. Huntington (1850–1927), who built a large mansion on the property. The site of the Shorb/Huntington rancho is occupied today by the Huntington Library, which houses a world-renowned art collection, research and rare-book library, and botanical gardens. In 1913 the three primary ranchos of Wilson, Patton, and Huntington, together with the subdivided areas from those and smaller ranchos, such as the Stoneman, White, and Rose ranchos, were incorporated as the city of San Marino.

The first mayor of the city of San Marino was George Smith Patton (1856–1927), the son of a slain Confederate States of America colonel in the U.S. Civil War (also named George Smith Patton, 1833–1864). He married Ruth Wilson, the daughter of Don Benito Wilson. Their son was the World War II general George S. Patton Jr.

To a prior generation of Southern Californians, San Marino was known for its old-money wealth and as a bastion of the region's WASP gentry. By mid-century, however, other European ethnic groups had become the majority.

In the 1980s, San Marino was home to serial killer and con-man Christian Gerhartsreiter. Posing as a member of the British aristocracy and relative of Louis Mountbatten, 1st Earl Mountbatten, Gerhartsreiter murdered John and Linda Sohus in 1985. Gerhartsreiter then fled to Greenwich, Connecticut and assumed a new alias. The body of John Sohus was discovered in San Marino in 1994 and Gerhartsreiter was later convicted of the killing in 2013. Linda Sohus' body has never been found.

In 1970, the city was 99.7% White. By 1990, the city's households were 23.7% Asian.

In 2000, the city's Asian households increased to 40%.

In recent decades, immigrants of Chinese and Taiwanese ancestry have come to represent more than 60% of the population, perhaps due to its location in the San Gabriel Valley, known to be a popular destination for East Asian immigrants. San Marino is considered home to many different Chinese restaurants and is often thought to a small, quaint town with its exception to Huntington Gardens.

The city is located in the San Rafael Hills, and it is divided into seven zones, based on minimum lot size. The smallest lot size is about 4,500 square feet (420 m), with many averaging over 30,000 square feet (2,800 m). Because of this and other factors, most of the homes in San Marino, built between 1920 and 1950, do not resemble the houses in surrounding Southern California neighborhoods (with the exception, perhaps, of neighboring portions of Pasadena). San Marino has also fostered a sense of historic preservation. With minor exceptions, the city has strict design review and zoning laws.

According to the United States Census Bureau, the city has a total area of 3.8 square miles (9.8 km), virtually all land.

San Marino is restrictive of commercial operations in the city. It is one of the few cities that requires commercial vehicles to have permits to work within the city.

Historical population

Census	Pop.	Note	%±
1920	584		—
1930	3,730		538.7%
1940	8,175		119.2%
1950	11,230		37.4%
1960	13,658		21.6%
1970	14,177		3.8%
1980	13,307		−6.1%
1990	12,959		−2.6%
2000	12,945		−0.1%
2010	13,147		1.6%
2020	12,513		−4.8%
2022 (est.)	12,039		−3.8%
U.S. Decennial Census

The 2020 United States census reported that San Marino's population was 12,513 residents. This is a decline from the 2010 census, where the population was 13,147. Asian Americans constituted the majority of San Marino residents at 8,061 (64.4%). White Americans were the second-largest group at 4,484 residents (35.8%). African Americans were the third-largest group at 109 residents (0.9%). American Indians or Native Americans represented 94 residents (0.8%). Native Hawaiians and Pacific Islanders represented 92 residents (0.7%). 722 residents responded as 'some other race' (5.8%). 888 residents identified as Hispanic or Latino American (7.1%).

The largest age demographic were 15-19 year olds, representing 1,064 residents (8.5%). The second-largest age demographic were 55-59 year olds, representing 1,016 residents (8.1%). 9,892 residents (79.1%) were 18 years old or older and 3,519 (28.1%) were over the age of 62.

According to the 2020 Census, San Marino had a median household income of $174,253, with 9.0% of the population living below the federal poverty line. With a median home price of $2,699,098, San Marino is one of the most expensive neighborhoods in the Los Angeles area.

The 2010 United States Census reported that San Marino had a population of 13,147. The population density was 3,483.4 inhabitants per square mile (1,344.9/km). The racial makeup of San Marino was 5,434 (41.3%) White (37.1% Non-Hispanic White), 55 (0.4%) African American, 5 (0.0%) Native American, 7,039 (53.5%) Asian, 2 (0.0%) Pacific Islander, 198 (1.5%) from other races, and 414 (3.1%) from two or more races. Hispanic or Latino of any race were 855 persons (6.5%).

The census reported that 13,066 people (99.4% of the population) lived in households, 81 (0.6%) lived in non-institutionalized group quarters, and 0 (0%) were institutionalized.

There were 4,330 households, out of which 1,818 (42.0%) had children under the age of 18 living in them, 3,220 (74.4%) were opposite-sex married couples living together, 367 (8.5%) had a female householder with no husband present, 143 (3.3%) had a male householder with no wife present. There were 42 (1.0%) unmarried opposite-sex partnerships, and 22 (0.5%) same-sex married couples or partnerships. Of all households, 531 (12.3%) were made up of individuals, and 359 (8.3%) had someone living alone who was 65 years of age or older. The average household size was 3.02. There were 3,730 families (86.1% of all households); the average family size was 3.28.

The population was spread out, with 3,422 people (26.0%) under the age of 18, 712 people (5.4%) aged 18 to 24, 2,353 people (17.9%) aged 25 to 44, 4,351 people (33.1%) aged 45 to 64, and 2,309 people (17.6%) who were 65 years of age or older. The median age was 45.3 years. For every 100 females, there were 92.4 males. For every 100 females age 18 and over, there were 87.7 males.

There were 4,477 housing units at an average density of 1,186.2 units per square mile (458.0 units/km), of which 3,959 (91.4%) were owner-occupied, and 371 (8.6%) were occupied by renters. The homeowner vacancy rate was 0.5%; the rental vacancy rate was 6.5%; 11,834 people (90.0% of the population) lived in owner-occupied housing units and 1,232 people (9.4%) lived in rental housing units.

As of the census of 2000, there were 12,945 people, 4,266 households, and 3,673 families residing in the city. The population density was 3,430.5 inhabitants per square mile (1,324.5/km). There were 4,437 housing units at an average density of 1,175.8 units per square mile (454.0 units/km). The racial makeup of the city was 51.98% White, 0.15% African American, 0.05% Native American, 47.7% Asian, 0.08% Pacific Islander, 1.04% from other races, and 2.30% from two or more races. Hispanic or Latino of any race were 3.25% of the population. More than one-third of the city's population, 33.3%, was Chinese.

There were 4,266 households, out of which 42% had children under the age of 18 living with them, 75% were married couples living together, 8.6% had a female householder with no husband present, and 13.9% were non-families. Of all households 12% were made up of individuals, and 7.3% had someone living alone who was 65 years of age or older. The average household size was 3.03 and the average family size was 3.29.

In the city, the age distribution of the population showed 26.5% under the age of 18, 6.4% from 18 to 24, 21.5% from 25 to 44, 29.4% from 45 to 64, and 16.2% who were 65 years of age or older. The median age was 43 years (this was older than average age in the U.S.). For every 100 females, there were 93.1 males. For every 100 females age 18 and over, there were 89.1 males.

San Marino is one of the county's cities with the highest proportion of residents of Asian ancestry. These were the ten neighborhoods in Los Angeles County with the largest percentage of Asian residents, according to the 2000 census:

San Marino is the location of the Huntington Library, Art Museum, and Botanical Gardens. In 1919, Henry E. Huntington provided limited access to his art collection, library containing the rare books and historical documents, and botanical collection. The Huntington's library contains 8 million manuscripts, 440,000 rare books, 454,000 reference books, 900,000 prints and ephemera, 777,000 photographs, and 300,000 digital files. The Huntington's art collections are housed in his large Neoclassical–Palladian mansion and feature European and American art spanning more than 500 years. In addition, the surrounding botanical gardens span approximately 120 acres and contain more than a dozen themed gardens. Collectively, the institution is known as "The Huntington Library, Art Collections and Botanical Gardens", or as "The Huntington," to the public.

El Molino Viejo ("The Old Mill"), completed about 1816 as a grist mill for Mission San Gabriel Arcángel, is in San Marino. The original two-story structure measured 53 by 26 feet (16.2 by 7.9 m). It is the oldest commercial building in Southern California. The town is located on the former lands of the historic Rancho Huerta de Cuati.

The Edwin Hubble House: From 1925 to 1953, this two-story stucco home was the residence of Edwin Hubble, one of America's great 20th-century astronomers, who, among other accomplishments, discovered extragalactic nebulae and their separation from each other. It is a National Historic Landmark.

The Michael White Adobe House is located on the campus of San Marino High School and houses the San Marino Historical Society archives.

The University of Southern California owns a house in San Marino which is used as the residence of the president of the university. The residence and grounds often are used for university events.

Across from City Hall, at the northeast corner of Huntington Drive and San Marino Avenue, is the Centennial Clock, donated to the community in 2005 by the Rotary Club of San Marino in celebration of Rotary International's 100th anniversary. Dedicated on July 4, 2005, the nineteen foot high clock includes a time capsule with artifacts donated by residents and community organizations which is to be opened on July 4, 2039, to mark the 100th anniversary of the Rotary Club of San Marino.

In the middle of San Marino lies Lacy Park, a 30-acre (120,000 m) expanse of grass and trees. Originally named Wilson Lake in 1875, the land was purchased by the city in 1925 and dedicated as a park. It is one of the few neighborhood parks that charge for admission, with a $5 fee for non-San Marino residents on weekends. A picnic area is often the site of musical concerts, civic events and pancake breakfasts. Within the park are two walking loops: an inner loop of approximately 3/4 mile in length, and an outer loop of approximately 1-mile (1.6 km) in length. Dogs are welcome with their owners, providing they are on a leash. In recent years, proposals from SMHS alumni Brent and Derek Barker to build a dedicated dog park on the unlandscaped western edge of the park have been shelved due to strident opposition from some of the city's elderly residents. The park includes six championship tennis courts and a pro shop, administered by the San Marino Tennis Foundation. At the west entrance of the park is the Rose Arbor, which is of special significance for the people of San Marino. It is sixty years old and has long been a source of beauty and tranquility to many residents. In recent years the care and upkeep of the Rose Arbor itself has been augmented by private donations from residents who have chosen to sponsor individual posts. The park recently built a memorial to General George S. Patton (a native of San Marino) and also a large memorial to the Armed Forces along with a statue of a sad soldier. The memorial includes the names of all military personnel from San Marino.

The city's local newspaper office is located on Mission St., in the city's “old town”. The San Marino Tribune has been the official newspaper of the city since 1929. There are two sections of the weekly paper, an "A" section and a "B" section, the distinction being that it covers San Marino news as well as news in Pasadena, San Gabriel, Alhambra, Arcadia and South Pasadena.

Governing the City of San Marino is a city council of five members, elected by the people for a four-year term. Elections are consolidated with the county and are held on the first Tuesday, following the first Monday in November of odd numbered years. Terms are staggered so that three seats are available during one election cycle and two seats are available during the next cycle. In 2015, the state enacted a law to require municipalities to consolidate their elections beginning January 1, 2018. The five council members serve without any financial compensation and elect one of their own members as Mayor.

The current city council members are:

• Mayor: Dr. Steven W. Huang (2024)
• Vice mayor: Gretchen Shepherd Romey (2024)
• Council members: Steven Talt, Calvin Lo, Tony Chou (2022)

San Marino's Fiscal Year 2019-2020 operating budget is $25,807,192. The city manager reports that for FY 2019-2020 "personnel costs comprise 2/3rds of the operating budget, and the largest portion of the increase from FY 2018-2019 is in that area."

This is a list of San Marino mayors by year:

• 1913-1922 George S. Patton
• 1922 William L. Valentine
• 1922-1924 George S. Patton
• 1924-1942 Richard H. Lacy
• 1980-1984 Lynn P. Reitnouer
• 1990 Suzanne Crowell
• 2001 Matthew Lin, the first Chinese-American mayor of San Marino
• 2009 Eugene Sun
• 2012 Richard Sun
• 2013 Richard Ward
• 2015 Eugene Sun
• 2016 Allan Yung
• 2017 Richard Sun
• 2018 Steve Talt
• 2019 Steven Huang
• 2020 Gretchen Shepherd Romey
• 2021 Ken Ude
• 2022 Susan Jakubowski
• 2023 Steve Talt
• 2024 Steven Huang

In the House of Representatives, San Marino is located in California's 27th congressional district, represented by Democrat Judy Chu.

On September 9, 1913, the first San Marino school was opened at the corner of Monterey Road, then called Calle de Lopez, and Oak Knoll, in what was known as the Old Mayberry Home. There were three teachers and thirty-five pupils from kindergarten through the eighth grade; high school students attended South Pasadena High School until San Marino High School was founded in 1952. San Marino High School graduated its first class in 1956. The high school's mascot, "The Titans", comes from Mt. Titano, in the Republic of San Marino.

San Marino High School is situated on the former site of Carver Elementary School. In 1996, the high school reconstruction was begun and the school is now equipped with new laboratories, classrooms, and Ethernet connections, supported mainly by bond issues and rigorous fund-raising by the San Marino Schools Endowment. The new buildings include a brand new cafeteria, orchestra and band room, dance studio, journalism lab, and renovated auditoriums, as well as a renovated baseball field and a brand new football field/track.

San Marino High School is part of the San Marino Unified School District. Its public funding is supplemented by private donations raised through the San Marino Schools Foundation. Each year, the Foundation raises funds necessary to balance the District's budget. To date, the San Marino Schools Foundation has contributed $18,268,485 to the schools since its inception in March 1980. From 2013 to 2017, the district was noted for having the highest percentage of students who met and exceeded the California Assessment of Student Performance and Progress standards.

The San Marino Unified School District has been ranked as the top unified school district in the state of California for eighteen consecutive years, including 2018. Each of its public primary schools has also been honored as a California Distinguished School and a National Blue Ribbon School.

There are four public schools in San Marino Unified School District:

• Valentine Elementary School
• Carver Elementary School
• Huntington Middle School
• San Marino High School

The two elementary schools offer instruction for grades K-5, the middle school for grades 6–8, and the high school for grades 9–12. The middle school was named Henry E. Huntington School, after San Marino's "first citizen." In 1953, a new K. L. Carver Elementary was completed at its current location on San Gabriel Boulevard and was named after K. L. Carver, a long-serving school board member. Stoneman Elementary School, named for Governor George Stoneman, who had resided in San Marino, is no longer used for instruction by San Marino School District. The former school is now leased by the San Marino City Recreation Department and houses San Marino Unified School District special education staff.

In November 2007, San Marino High School was ranked 82nd on a list of the best high schools in the nation, according to U.S. News & World Report.

This section needs additional citations for verification. Please help improve this article by adding citations to reliable sources in this section. Unsourced material may be challenged and removed. Find sources: "San Marino, California" – news · newspapers · books · scholar · JSTOR (October 2024) (Learn how and when to remove this message)

• Southwestern Academy, a private college preparatory school, was founded on April 7, 1924. The campus was part of an original Spanish grant (the old ranch grew orange and avocado trees) and the land was subsequently legalized by Abraham Lincoln. "Southwestern Academy" was named to capture the distinctive spirit of the Southwestern United States. Pioneer Hall, which was Southwestern's original campus building, was the home of then-Governor George Stoneman.
• Saints Felicitas and Perpetua school is a Catholic school that offers education in grades K-8. The city took the Archdiocese of Los Angeles to the Supreme Court to block the construction of the school, as it was attempting to demolish a historical site called Casa Blanca or the Old Adobe (at one time the Luther Harvey Titus Adobe) to make way for the new school. Saints Felicitas & Perpetua School was completed and dedicated in 1950.

The city is served by the San Marino Tribune, a paid community weekly newspaper and the San Marino Outlook, also a community weekly newspaper.

The city currently is served by the San Marino Police Department.

The Crowell Public Library opened in 2008.

Father of the Bride, The Wedding Singer, In Name Only, and The Holiday were filmed in San Marino.

Lacy Park - Park and Garden Huntington Library - Popular Library Huntington Gardens - Garden El Molina Viejo - Historical Landmark San Marino Bridge - Famous Bridge in San Marino San Marino Cafe - Restaurant Colonial Kitchen - Restaurant Julienne Fine Foods - Grocery Store Pizzanista - Restaurant Tony’s Pizza - Pizza Noodle World - Restaurant

• California's 25th State Senate district
• History of the Chinese Americans in Los Angeles
• Governor Stoneman Adobe, Los Robles California Historical Landmark
• El Molino Viejo California Historical Landmark

• James T. Maher, 1975. The Twilight of Splendor: Chronicles of the Age of American Palaces. - A chapter is on Huntington's San Marino estate.

• Official website