California ZIP Code Lookup & Directory
Few states put as much distance between one ZIP code and the next as California does. A downtown Los Angeles ZIP code might pack over 100,000 people into a few square miles, while a ZIP code in the Sierra Nevada foothills or the far northern redwood country can stretch across mountains and forest with barely a few hundred residents. Los Angeles, San Diego, San Jose, San Francisco, Sacramento, and Fresno each anchor their own postal ecosystem, and getting the ZIP code right matters whether the destination is a high-rise in the Bay Area or a vineyard in Napa County.
This directory is built to make that lookup fast and accurate confirming a Los Angeles County ZIP, checking which county a Central Valley town belongs to, or verifying an address before a shipment heads out through one of the state's major ports. For other state directories, see the Arizona ZIP Code Directory and the Arkansas ZIP Code Directory.
About ZIP Codes in California
Every California ZIP code begins with the digit 9, using prefixes from 900 through 961. The numbering runs roughly south to north: 900 through 908 cover the greater Los Angeles area, 910 through 928 stretch across Southern California including San Diego and the Inland Empire, 930 through 939 cover the Central Coast and southern San Joaquin Valley, and prefixes from 940 upward move through the Bay Area, Sacramento, and the far northern counties near the Oregon border.
Los Angeles County alone carries more ZIP codes than most entire states, a reflection of its status as the most populous county in the country. San Diego, Orange, Riverside, and San Bernardino counties follow, together forming the dense ZIP corridor of Southern California, while the Bay Area's Santa Clara, Alameda, and San Francisco counties form a second major cluster further north.
How ZIP Codes Work in California
USPS assigns each ZIP code a preferred city name based on delivery routing, which frequently doesn't match the neighborhood or municipality residents actually identify with. A ZIP code labeled "Los Angeles" might cover parts of unincorporated LA County, or a ZIP technically assigned to "San Jose" might sit closer to a neighboring city boundary. This is especially common in the sprawling LA Basin, where dozens of cities and unincorporated communities sit side by side with overlapping ZIP boundaries.
California also has a number of unique ZIP code situations. Beverly Hills' 90210 became a cultural landmark after the television series named after it, and Downtown Los Angeles alone uses more than a dozen distinct ZIP codes to separate its financial district, Arts District, and surrounding neighborhoods. Military ZIP codes exist around installations like Naval Base San Diego and Travis Air Force Base near Fairfield, and PO Box-heavy ZIP codes are common in both dense downtown cores and small mountain communities in the Sierra Nevada, where physical delivery is impractical.
Browse ZIP Codes by City
City search covers California's roughly 1,000 incorporated cities and unincorporated communities. Searching a major metro like Los Angeles, San Diego, or San Francisco returns dozens of results split by neighborhood, while a Central Valley town like Modesto or Visalia returns a handful, and small mountain or desert communities often return just one.
Major Cities & ZIP Code Coverage
Los Angeles, the state's largest city, uses well over 100 individual ZIP codes. Downtown LA covers 90012, 90013, and 90014, Hollywood uses 90028 and 90038, Westwood near UCLA falls under 90024, and Bel Air uses the well-known 90077 code.
San Diego spans ZIP codes from the low 92100s through the 92170s, with downtown, Balboa Park, and the coastal La Jolla neighborhood each carrying distinct codes.
San Francisco uses a compact set of ZIP codes in the 941xx range given its small physical footprint, with the Financial District, Mission, and Sunset neighborhoods each assigned separate codes despite the city's dense concentration.
San Jose, the largest city in the Bay Area and the unofficial capital of Silicon Valley, spans 95xxx codes stretching from downtown out through the tech corridor near companies like Cisco and Adobe.
Sacramento, the state capital, uses 958xx codes covering downtown, the state capitol grounds, and the surrounding delta region, while Fresno, the hub of the Central Valley's agricultural economy, uses 937xx codes.
ZIP Codes by County
Los Angeles County leads the state by a wide margin in ZIP code count, driven by its enormous population and the sheer number of incorporated cities within it. San Diego, Orange, and Riverside counties follow, forming a dense Southern California cluster, while Santa Clara and Alameda counties anchor a similarly dense cluster in the Bay Area.
Rural counties tell a very different story. Modoc, Alpine, and Sierra counties in the far north and eastern Sierra Nevada have only a small handful of ZIP codes covering vast, sparsely populated terrain, while agricultural counties in the Central Valley like Kings and Merced carry moderate ZIP counts tied to their farming communities.
Popular ZIP Codes
| ZIP Code | City | County | Notes |
|---|---|---|---|
| 90012 | Los Angeles | Los Angeles | Downtown civic and financial district |
| 90210 | Beverly Hills | Los Angeles | One of the most recognized ZIP codes in the country |
| 92101 | San Diego | San Diego | Downtown and Gaslamp Quarter |
| 94103 | San Francisco | San Francisco | South of Market (SoMa) tech district |
| 95113 | San Jose | Santa Clara | Downtown San Jose, Silicon Valley core |
| 95814 | Sacramento | Sacramento | State capitol and downtown government offices |
| 93721 | Fresno | Fresno | Central Valley agricultural hub |
| 96161 | Truckee | Nevada | Sierra Nevada mountain community near Lake Tahoe |
Mailing, Shipping & Address Verification
Southern California's sprawl causes the most frequent addressing confusion, since a package addressed to "Los Angeles" might actually need to reach an unincorporated community or a smaller city that shares an LA-preferred ZIP code. The same applies around San Jose, where several smaller cities in the Santa Clara Valley share ZIP boundaries with their larger neighbor. Verifying the exact ZIP against the county, not just the city name, avoids delivery delays in these dense metro clusters.
Rural addresses in the Sierra Nevada, the northern redwood counties, and parts of the Mojave Desert often rely on PO Box or rural route delivery, since winding mountain roads and remote desert access make standard street delivery impractical in some communities. Apartment and unit numbers matter heavily in dense urban ZIP codes like those in downtown LA and San Francisco, where high-rise buildings can house hundreds of separate deliveries under a single street address.
Business, Logistics & Delivery
California's freight network centers on Interstate 5, which runs the length of the state from the Oregon border to the Mexican border, and Interstate 80, connecting the Bay Area to Sacramento and on toward Nevada. Interstate 10 and Interstate 15 handle much of the Southern California and Inland Empire freight corridor, an area that has become one of the largest warehousing and distribution hubs in the country.
The Port of Los Angeles and the Port of Long Beach together form the busiest container port complex in the United States, moving a massive share of the nation's imported goods through ZIP codes across the South Bay and Inland Empire. The Port of Oakland serves a similar role for Northern California and the Bay Area. Los Angeles International Airport (LAX) and San Francisco International Airport (SFO) rank among the busiest cargo and passenger airports in the country, supporting industries from entertainment and technology to agriculture and aerospace.
Silicon Valley's technology corridor, running through San Jose, Sunnyvale, and Palo Alto, generates enormous logistics demand for both consumer shipping and enterprise hardware distribution. The Central Valley, anchored by Fresno and Bakersfield, remains one of the most productive agricultural regions in the world, and its ZIP codes see heavy seasonal freight tied to harvest cycles for crops like almonds, grapes, and citrus.
Quick Facts
| ZIP Code Range | 90001–96162 |
| Counties | 58 |
| Largest City | Los Angeles |
| State Capital | Sacramento |
| Time Zone | Pacific Time |
| Major Area Codes | 213, 310, 415, 408, 619, 916, 559, 707 |
Helpful Tips
Double-check ZIP codes for addresses in unincorporated Los Angeles or Santa Clara County communities, since they often share a preferred city name with a larger neighboring city. When shipping to mountain communities in the Sierra Nevada, build in extra time during winter months, since snow can affect rural route delivery schedules. For downtown high-rise addresses in Los Angeles or San Francisco, always include the exact suite or unit number, since a single ZIP code there can serve thousands of separate businesses and residences. Businesses shipping through the Ports of LA and Long Beach should account for potential congestion delays, since these ports handle an outsized share of the country's import volume.
Related Pages
- Alabama ZIP Code Directory
- Alaska ZIP Code Directory
- Arizona ZIP Code Directory
- Arkansas ZIP Code Directory
- Browse All US States
- ZIP Code Lookup Tool
- ZIP Code Distance Calculator
FAQ
How many ZIP codes does California have?
California has more than 1,700 ZIP codes spread across all 58 counties, more than any other state in the country.
What ZIP code range does California use?
California ZIP codes run from around 90001 in Los Angeles to 96162 near Truckee and Lake Tahoe, using prefixes 900 through 961.
Which county has the most ZIP codes in California?
Los Angeles County has far more ZIP codes than any other county in the state, reflecting its status as the most populous county in the country.
Why is 90210 so widely recognized?
ZIP code 90210 covers Beverly Hills and became a cultural symbol after the television series "Beverly Hills, 90210" debuted in 1990.
Does Los Angeles have more than one ZIP code?
Yes, Los Angeles uses well over 100 individual ZIP codes across its many neighborhoods and districts.
Are there military ZIP codes in California?
Yes, installations such as Naval Base San Diego and Travis Air Force Base near Fairfield have their own postal designations.
Why do some Central Valley ZIP codes cover such large areas?
Agricultural counties like Kings, Merced, and Kern have lower population density, so a single ZIP code can cover a much larger farming area than an urban ZIP.
Do rural mountain counties have fewer ZIP codes?
Yes, counties like Alpine, Sierra, and Modoc have very few ZIP codes given their small, spread-out populations.
How do I find the correct ZIP code for a small California town?
Search by the specific community name rather than the nearest larger city, since many towns share a ZIP code with a neighboring municipality.
What time zone does California use?
The entire state operates on Pacific Time.
Why are the Ports of LA and Long Beach relevant to shipping?
Together they form the busiest container port complex in the United States, which affects freight timing and delivery through many Southern California ZIP codes.
What area codes are common in California?
California uses dozens of area codes, including 213 and 310 in Los Angeles, 415 in San Francisco, 408 in San Jose, 619 in San Diego, and 916 in Sacramento.
Conclusion
California's ZIP code map mirrors the state's scale dense and layered across Los Angeles, the Bay Area, and San Diego, then wide open across the Central Valley, the Sierra Nevada, and the far northern counties. Confirming the right ZIP code here means paying attention to county boundaries, preferred city names, and the difference between a compact urban code and one covering hundreds of square miles of farmland or mountains. Search by city or ZIP code above to find accurate postal information for any address in California.