The 20 Most Affluent Zip Codes in California

California is called the Golden State due to its fields of dazzling wild poppies and the discovery of gold in 1949.

The nickname remains particularly apt today in the neighborhoods listed below.

The rundown below was complied using IRS data from 2018 to calculate the mean average of the adjusted gross income in each Californian zip code.

Previous research conducted by Zillow found California's most expensive average property prices were found in Atherton, where the mean cost of a home was more than $6.8 million.

Take a tour of the 20 most affluent zip codes in California...

Beverly Hills 90212

$255,850 (average adjusted gross income)

Beverly Hills 90212
A limousine waits at the corner of Via Rodeo and Rodeo Drive, January 12, 2002, in Beverly Hills. Zip code 90212 has a mean adjusted gross income of $255,850 David McNew/Getty Images

The city of Beverly Hills is recognised the world over as a home to celebrities, luxury hotels and the Rodeo Drive shopping district.

ZIP code 90212 covers a smaller than average area and has an extremely large population density.

Los Gatos 95032


Los Gatos 95032
Water fountain in Los Gatos Civic Center; the Town Hall building visible in the background; south San Francisco bay area, California. Los Gatos 95032 has a mean adjusted gross income of $258,500 Sundry Photography/Getty Images

Los Gatos is part of Silicon Valley, with several high tech companies, most notably Netflix, based there.

ZIP code 90212 is located in western California and is home to a large number of middle-aged adults.

Bel Air 90077


Bel Air 90077
Aerial view of Holmby Hills and Benedict Canyon areas in Beverly Hills and Los Angeles, California. Bel Air 90077 has a mean adjusted gross income of $262,570 trekandshoot/Getty Images

This glamorous area of Los Angles was once home to legendary Hollywood stars including Tony Curtis, Marilyn Monroe and Burt Reynolds.

The southern Californian zip code 90077 is today home to a large number of families.

Redwood City 94062


Woodside, California, 94062
This 5-bed home in Woodside, California, 94062 is listed for $7,700,000 BluSky Media for Golden Gate Sotheby’s International Realty

Redwood City is a city on the San Francisco Peninsula known for its high-end restaurants, cafes and parks.

Many families and young professionals live in Redwood City and zip 94062 residents reportedly tend to lean liberal.

Alamo 94507


Living in Alamo offers residents a rural feel, with several of the Californian city's parks highly rated.

This area primarily located in Contra Costa County is home to an extremely large number of families.

Burlingame 94010


Burlingame 94010
Burlingame Station, California. Burlingame is a city in San Mateo County, California. Burlingame 94010 has a mean adjusted gross income of $276,230 ersler/Getty Images

This Californian city is named after diplomat Anson Burlingame and is recognized for its eucalyptus groves, high quality of life and walkable downtown area.

The residential suburb of San Francisco is primarily home to people in their late 20s to early 40s.

Menlo Park 94025


Menlo Park, California, 94025
This 4-bed home in Menlo Park, California, 94025 is listed for $2,699,000 Aerial Canvas for Golden Gate Sotheby’s International Realty

Menlo Park is best known for abundant high-tech employers in addition to encompassing portions of the Stanford University campus.

This area of western California is a base for a significant number of people in their late 20s to early 40s.

Pacific Palisades 90272


Pacific Palisades, California, 90272
This three-bed home in Pacific Palisades, California, 90272 is listed for $2,499,000. Pacific Palisades 90272 has a mean adjusted gross income of $308,550 Cody Rappaport for Sotheby’s International Realty

The Pacific Palisades is a close-knit community boasting a Mediterranean climate, hilly topography and an abundance of parks and hiking trails.

This three-mile strip of Californian coastline is also home to a statistically significant number of seniors.

Tiburon 94920


Easton Point
Easton Point (aka the 'Martha Property'), the San Francisco Bay Area’s most iconic, pristine land of approximately 100 acres is for sale for $95,000,000 Jason Wells for Golden Gate Sotheby’s International Realty

This zip code is found on the Tiburon Peninsula, which reaches south into the San Francisco Bay.

The exclusive area of Tiburon is home to a larger than average number of young families.

Saratoga 95070


Saratoga 95070
Aerial view of hills covered by vineyards and mansions in Santa Cruz Mountains, Saratoga, California. Saratoga 95070 has a mean adjusted gross income of $334,740 Sundry Photography/Getty Images

Sitting on the western edge of Silicon Valley, Saratoga is known locally for its suburban small-town feel, wineries and exclusive restaurants.

The demographics of zip 95070 is primarily composed of middle-aged adults and seniors.

Santa Monica 90402


Santa Monica, California, 90402
This 3-bed one-of-a-kind in Santa Monica, California, 90402 costs $4,950,000 Michael McNamara, Zenhouse Collective for Sotheby’s International Realty

Beverly Hills is associated with Hollywood glamour, in addition to being one of the most expensive places to live in the state.

This section of coast west of downtown Los Angeles has become a magnet for many numerous celebrities.

Encino 91436


Encino, California, 91436
This 5-bed home in Encino, California, 91436 costs $6,395,000. Encino 91436 has a mean adjusted gross income of $366,240 Jeff Elson for Wish Sotheby’s International Realty

Encino is a neighborhood in the San Fernando Valley region of Los Angeles reportedly home to celebrities including Samuel L. Jackson, Ice Cube and David Hasselhoff.

Many young professionals and retirees live in the exclusive and expensive area of Encino.

Los Gatos 95030


Los Gatos, California, 95030
This 4-bed home in Los Gatos, California, 95030 is listed for $6,498,000 Arthur Sharif, Sotheby’s International Realty

The cost of living in this strip of Los Gatos is significantly higher than the national average.

This area of Silicon Valley sits in the southwest corner of San Jose in the foothills of the Santa Cruz Mountains.

Los Altos 94024


Los Altos Hills, California, 94024
This 4-bed home in Los Altos Hills, California, 94024 is listed for $5,385,000 Nate Donovan for Golden Gate Sotheby’s International Realty

With its distinctly dense suburban feel, Los Altos real estate consistently ranks among the most expensive in the U.S.

Some 97.79 percent of the workforce in 94024 are reportedly employed in white-collar jobs, earning well above the national average.

Palo Alto 94301


Palo Alto, California, 94301
This 5-bed home in Palo Alto, California, 94301 is listed for $9,750,000. Palo Alto as a mean adjusted gross income of 94301 Arthur Sharif, Sotheby’s International Realty

With its wealth of parks and green spaces and some of the best schools in the country, Palo Alto is very attractive to affluent young families.

This is born out by demographic data, revealing a larger than average number of children living in zip 94301.

Los Altos 94022


Los Altos Hills, California, 94022
This 5-bed home in Los Altos Hills, California, 94022 is listed for $5,495,000 Provided by Sotheby’s International Realty

Translated as "the heights" in Spanish, this zip code in Santa Clara County serves as a major source of commuters to Silicon Valley.

Portola Valley 94028


Portola Valley, California, 94028
This 5-bede Portola Valley, California, 94028 home is listed for $15,995,000 Nate Donovan for Golden Gate Sotheby’s International Realty

This small town in San Mateo County is recognized as one of the wealthiest in the U.S. by the American Community Survey.

The exclusive area of Portola Valley is home to primarily middle-aged adults.

San Francisco 94104


San Francisco 94104
A view of the Central Tower Building looking east on Market Street from Ellis Street in 2006 in San Francisco, California. San Francisco 94104 has a mean adjusted gross income of $620,220 Justin Sullivan/Getty Images

San Francisco is a cultural, commercial and financial hub of Northern California.

The city is home to an extremely large number of middle-aged adults and a significantly low proportion of children.

Los Angeles 90067


Los Angeles, California, 90067
A two-bed apartment in this block Los Angeles, California 90067 is listed for $1,450,000 Daniel Solomon for Vista Sotheby’s International Realty

The bustling Century City has developed on a former backlot of 20th Century Studios.

Packed with offices and skyscrapers, the area is home to only a few thousand people. But being close to work seems to be paying off for them looking at the average paycheck.

Atherton 94027


A mansion style home in Atherton, California
File photo: A mansion style home (pictured in July 12, 2005) in Atherton, California. The small town in the heart of silicon is one of the wealthiest neighborhoods in the United States. Justin Sullivan/Getty Images

Even among the hyper-affluent elite Californian areas, Atherton stands out.

The town is one of the most exclusive and expensive enclaves in the entire country—a fact born out by residents' mean adjusted gross income exceeding $1 million.

The little leafy community is home to technology moguls such as Google's Eric Schmidt who live in opulent multimillion-dollar gated mansions.