Norwalk is a city in Los Angeles County, California, United States. The population was 102,773 at the 2020 census.

Founded in the late 19th century, Norwalk was incorporated as a city in 1957. It is located 17 miles (27 km) southeast of downtown Los Angeles and is part of the Greater Los Angeles area.

Norwalk is a member of the Gateway Cities Council of Governments. Norwalk's sister cities are Morelia in the Mexican state of Michoacán, and Hermosillo, in the Mexican state of Sonora.

The area known as "Norwalk" was first home to the Shoshonean Native American tribe. They survived primarily on honey, an array of berries, acorns, sage, squirrels, rabbits and birds. Their huts were part of the Sejat Indian village.

In the late 1760s, settlers and missions flourished under Spanish rule with the famous El Camino Real trail traversing the area. Manuel Nieto, a Spanish soldier, received a Spanish land grant (Rancho Los Nietos) in 1784 that included Norwalk.

After the Mexican–American War in 1848, the Rancho and mining days ended. Portions of the land were subdivided and made available for sale when California was admitted into the union of the United States. Word of this land development reached the Sproul Brothers in Oregon. They recalled the fertile land and huge sycamore trees they saw during an earlier visit to the Southern California area. In 1869, Atwood Sproul, on behalf of his brother, Gilbert, purchased 463 acres (1.87 km2) of land at $11 an acre ($2,700/km2) in an area known as Corazón de los Valles, or "Heart of the Valleys".

By 1873, railroads were being built in the area and the Sprouls deeded 23 acres (93,000 m2), stipulating a "passenger stop" clause in the deed. Three days after the Anaheim Branch Railroad crossed the "North-walk" for the first time, Gilbert Sproul surveyed a town site. In 1874, the name was recorded officially as Norwalk. While a majority of the Norwalk countryside remained undeveloped during the 1880s, the Norwalk Station allowed potential residents the opportunity to visit the "country" from across the nation.

The families referred to as the "first families" of Norwalk (including the Sprouls, the Dewitts, the Settles, and the Orrs) settled in the area in the years before 1900. D.D. Johnston pioneered the first school system in Norwalk in 1880. Johnston was also responsible for the first real industry in town, a cheese factory, by furnishing Tom Lumbard with the money in 1882. Norwalk's prosperity was evident in the 1890s with the construction of a number of fine homes that were located in the middle of orchards, farms and dairies. Headstones for these families can be found at Little Lake Cemetery, which was founded in 1843 on the border between Norwalk and Santa Fe Springs at Lakeland Road.

At the turn of the 19th century, Norwalk had become established as a dairy center. Of the 50 local families reported in the 1900 census, most were associated with farming or with the dairy industry. Norwalk was also the home of some of the largest sugar beet farms in all of Southern California during this era. Many of the dairy farmers who settled in Norwalk during the early part of the 20th century were Dutch.

After the 1950s, the Hispanic population in Norwalk grew significantly as the area became increasingly residential.

In February 1958, two military aircraft, a Douglas C-118A military transport and a U.S. Navy P2V-5F Neptune patrol bomber, collided over Norwalk at night. Forty-seven servicemen were killed, as was a civilian 23-year-old woman on the ground who was hit by falling debris. A plaque commemorating the disaster and erected by the American Legion in 1961 marks the spot of the accident, today a mini-mall at the corner of Firestone Boulevard and Pioneer Boulevard.

Built in 1891 by the D.D. Johnston family, the Hargitt House was built in the architectural style of Victorian Eastlake. The Hargitt House Museum, located at 12426 Mapledale, was donated to the people of Norwalk by Charles ("Chun") and Ida Hargitt.

The Sproul House is a Stick Style-influenced, Victorian farm house built in 1870 by the founder of Norwalk, Gilbert Sproul. He and his family lived there while he founded Norwalk. His descendants lived in the house continually until 1962 when it was donated to the city. Today it houses the Gilbert Sproul Museum which covers Norwalk history through artifacts, photos, documents and other interpretive elements.

Norwalk is located at 33°54′25″N 118°5′0″W / 33.90694°N 118.08333°W / 33.90694; -118.08333 (33.906914, -118.083398).

According to the United States Census Bureau, the city has a total area of 25.243 km2 (10 sq mi). 9.707 square miles (25.14 km2) of it is land and 0.039 square miles (0.10 km2) of it (0.40%) is water.

Norwalk is bordered by Downey to the northwest, Bellflower to the southwest, Cerritos and Artesia to the south, and Santa Fe Springs and Whittier to the north and east.

67.7% of persons age 5 years+, 2014–2018 live in a home where another language than English is spoken.

The 2010 United States Census reported that Norwalk had a population of 105,549. The population density was 10,829.6 inhabitants per square mile (4,181.3/km2). The racial makeup of Norwalk was 52,089 (49.4%) White (12.3% Non-Hispanic White), 4,593 (4.4%) African American, 1,213 (1.1%) Native American, 12,700 (12.0%) Asian (5.3% Filipino, 2.5% Korean, 0.9% Chinese, 0.8% Indian, 0.8% Vietnamese, 0.6% Cambodian, 0.3% Thai, 0.3% Japanese), 431 (0.4%) Pacific Islander, 29,954 (28.4%) from other races, and 4,569 (4.3%) from two or more races. Hispanic or Latino of any race were 74,041 persons (70.1%)

The Census reported that 103,934 people (98.5% of the population) lived in households, 315 (0.3%) lived in non-institutionalized group quarters, and 1,300 (1.2%) were institutionalized.

There were 27,130 households, out of which 13,678 (50.4%) had children under the age of 18 living in them, 15,190 (56.0%) were opposite-sex married couples living together, 5,045 (18.6%) had a female householder with no husband present, 2,348 (8.7%) had a male householder with no wife present. There were 1,712 (6.3%) unmarried opposite-sex partnerships, and 178 (0.7%) same-sex married couples or partnerships. 3,417 households (12.6%) were made up of individuals, and 1,631 (6.0%) had someone living alone who was 65 years of age or older. The average household size was 3.83. There were 22,583 families (83.2% of all households); the average family size was 4.10.

The population was spread out, with 29,164 people (27.6%) under the age of 18, 12,026 people (11.4%) aged 18 to 24, 30,138 people (28.6%) aged 25 to 44, 23,790 people (22.5%) aged 45 to 64, and 10,431 people (9.9%) who were 65 years of age or older. The median age was 32.5 years. For every 100 females, there were 98.5 males. For every 100 females age 18 and over, there were 95.3 males.

There were 28,083 housing units at an average density of 2,881.4 per square mile (1,112.5/km2), of which 17,671 (65.1%) were owner-occupied, and 9,459 (34.9%) were occupied by renters. The homeowner vacancy rate was 1.4%; the rental vacancy rate was 3.8%. 70,180 people (66.5% of the population) lived in owner-occupied housing units and 33,754 people (32.0%) lived in rental housing units.

During 2009–2013, Norwalk had a median household income of $60,770, with 12.9% of the population living below the federal poverty line.

As of the census of 2000, there were 103,298 people, 26,887 households, and 22,531 families residing in the city. The population density was 10,667.6 inhabitants per square mile (4,118.8/km2). There were 27,554 housing units at an average density of 2,845.5 per square mile (1,098.7/km2). The racial makeup of the city was 44.82% White, 4.62% African American, 1.16% Native American, 11.54% Asian, 0.39% Pacific Islander, 32.75% from other races, and 4.71% from two or more races. Hispanic or Latino of any race were 62.89% of the population.

There were 26,887 households, out of which 46.6% had children under the age of 18 living with them, 60.1% were married couples living together, 16.6% had a female householder with no husband present, and 16.2% were non-families. 12.7% of all households were made up of individuals, and 5.8% had someone living alone who was 65 years of age or older. The average household size was 3.79 and the average family size was 4.08.

In the city, the population was spread out, with 32.1% under the age of 18, 10.7% from 18 to 24, 30.5% from 25 to 44, 17.6% from 45 to 64, and 9.0% who were 65 years of age or older. The median age was 30 years. For every 100 females, there were 97.9 males. For every 100 females age 18 and over, there were 94.3 males.

The median income for a household in the city was $46,047, and the median income for a family was $47,524. Males had a median income of $31,579 versus $26,047 for females. The per capita income for the city was $14,022. About 9.5% of families and 11.9% of the population were below the poverty line, including 14.8% of those under age 18 and 7.6% of those age 65 or over.

Norwalk operates under a Council/Manager form of government, established by the Charter of the City of Norwalk which was drafted in 1957. The five-member City Council acts as the city's chief policy-making body. Every two years, Council members are elected by the citizens of Norwalk to serve four-year, overlapping terms. Council members are not limited to the number of terms they may serve. The Mayor is selected by the council and serves a one-year term.

According to the city's most recent Comprehensive Annual Financial Report, the city's various funds had $78.2 million in Revenues, $79.1 million in Expenditures, $107.2 million in Total Assets, $48.7 million in Total Liabilities, and $54.8 million in Cash and Investments.

The structure of the management and coordination of city services is:

Norwalk is a contract city, in which the Los Angeles County Sheriff's Department provides police services. It maintains its own station, which also provides police services to La Mirada and unincorporated South Whittier. At one time the station also provided contracted police services to Santa Fe Springs, but those services ended when the city entered into a contract with the Whittier Police Department. The station is staffed with 206 sworn personnel.

Fire protection in Norwalk is provided by the Los Angeles County Fire Department with ambulance transport by Care Ambulance Service.

Norwalk is the home of the Los Angeles County Registrar/Recorder. The Los Angeles County Registrar's Office is responsible for the registration of voters, maintenance of voter files, conduct of federal, state, local and special elections and the verification of initiative, referendum and recall petitions. There are approximately 4.1 million registered voters, and 5 thousand voting precincts established for countywide elections. The office also has jurisdiction over marriage license issuance, the performance of civil marriage ceremonies, fictitious business name filings and indexing, qualification and registration of notaries and miscellaneous statutory issuance of oaths and filings. The office issues approximately 75,000 marriage licenses and processes 125,000 fictitious business name filings annually. The Recorder's Office is responsible for recording legal documents which determine ownership of real property and maintains files of birth, death and marriage records for Los Angeles County. It serves the public and other County departments such as the Assessor, Health Services, Public Social Services and Regional Planning. The office processes 2 million real and personal property documents and 750,000 birth, death and marriage records annually and services approximately 2,000 customers daily.

In the Los Angeles County Board of Supervisors, Norwalk is in the Fourth District, represented by Janice Hahn.

In the California State Senate, Norwalk is in the 32nd Senate District, represented by Republican Kelly Seyarto. In the California State Assembly, it is split between the 57th Assembly District, represented by Democrat Reggie Jones-Sawyer, and the 58th Assembly District, represented by Democrat Sabrina Cervantes.

In the United States House of Representatives, Norwalk is in California's 38th congressional district, represented by Democrat Linda Sánchez.

The Los Angeles County Department of Health Services operates the Whittier Health Center in Whittier, serving Norwalk.

The United States Postal Service operates the Norwalk Post Office at 14011 Clarkdale Avenue and the Paddison Square Post Office at 12415 Norwalk Boulevard.

The Southeast District of the Los Angeles County Superior Court is located in Norwalk.

The 162-acre (0.66 km2) Metropolitan State Hospital, a psychiatric and mental health facility operated by the California Department of State Hospitals, is located in Norwalk. It has four different types of categories for patient intake. The four categories being; incompetent to stand trial (PC 1370), offender with a mental health disorder (PCS 2962/2972), not guilty by reason of insanity (PC 1026), and conservatorship lanterman-petris-short (LPS) Act.

Three freeways travel through the city. The Santa Ana Freeway (I-5) and San Gabriel River Freeway (I-605) pass through and intersect just above its northern edge, while the Century Freeway (I-105) ends in Norwalk at Studebaker Road.

Norwalk Transit serves Norwalk and its adjacent communities. Six bus lines operate in Norwalk and adjacent cities, including Artesia, Bellflower, Cerritos, La Mirada and Whittier. Norwalk Transit Buses make connections with Los Angeles Metro Rail C Line from Route 2 and Metrolink from Route 7

Long Beach Transit provides service to the Metro C Line Station via Studebaker Road from Long Beach.

The Los Angeles MTA ("Metro") provides both bus and rail service from Norwalk. The Metro C Line (formerly the Green Line) light rail provides service from the Norwalk C Line station to LAX (via shuttle from Aviation Station) and Redondo Beach. Metro bus routes provide service to the west on Florence Avenue, Firestone Boulevard, Imperial Highway, and Rosecrans Avenue from the Norwalk C Line Station. Express routes also connect to Disneyland, El Monte Bus Station, Long Beach and downtown Los Angeles.

The Metrolink Orange County Line and 91/Perris Valley Line (which operate on the same track in this area) trains connect Norwalk (the Norwalk/Santa Fe Springs station) with Orange County, Riverside County, and Downtown Los Angeles.

According to the city's 2013 Comprehensive Annual Financial Report, the top employers in the city are:

Although Norwalk is credited with being the home to Cerritos College, only the east half of the campus is actually in Norwalk, the west half is in Cerritos. Founded in 1955, Cerritos College is a public community college serving an area of 52 square miles (130 km2) of southeastern Los Angeles county. The college offers degrees and certificates in 87 areas of study in nine divisions. Over 1,200 students complete their course of studies each year.

Most of Norwalk is served by the Norwalk-La Mirada Unified School District,

headquartered at 12820 Pioneer Boulevard in Norwalk. NLMUSD also contains The California distinguished school J.B. Morrison Elementary Magnet School in Norwalk.

Certain areas of Norwalk are served by the Little Lake City School District (elementary school district), headquartered in Santa Fe Springs, and the Whittier Union High School District. Another section is within the ABC Unified School District, based in Cerritos.

Among the several parochial schools in Norwalk are Saint John of God School (Roman Catholic, of the Roman Catholic Archdiocese of Los Angeles), Pioneer Baptist School (Baptist Christian), and Saint Linus School (Roman Catholic).

The independent TV station KHJ-TV/KCAL-TV channel 9 was licensed to Norwalk for a year in 1989 during an ownership transfer as part of a settlement with the FCC by former owner RKO General; the one-year change in city of license was barely noted on-air (it returned to a city of license of Los Angeles in 1990), and the station never had any actual assets based in Norwalk.