Question 1

How many zip codes does California have?

Accepted Answer

This directory lists 2,710 California zip codes: 1,764 standard delivery ZIPs and 946 PO Box or unique ZIPs.

Question 2

What is the lowest zip code in California?

Accepted Answer

90001, in South Los Angeles, is the lowest-numbered California zip code; 96162 (Truckee) is the highest.

Question 3

What area codes are used in California?

Accepted Answer

California uses multiple area codes including 213, 310, 415, 619, 916, 408, 714, 818, and many more.

Question 4

What time zone is California in?

Accepted Answer

California is in the Pacific Time Zone.

Question 5

What number do California zip codes start with?

Accepted Answer

California zip codes begin with 9, ranging from 90001 to 96162.

Question 6

How do I find a zip code by address in California?

Accepted Answer

Use the search bar at the top of this page to enter a city name or zip code. For precise address-level lookup, the USPS ZIP Code Lookup tool at usps.com is the authoritative source.

Question 7

Are all California zip codes the same area code?

Accepted Answer

No, California uses many area codes across the state due to its large population and geography.

Question 8

Do zip codes in California ever cross county lines?

Accepted Answer

Yes, some zip codes cross county boundaries. When this occurs, the zip code may appear under multiple county listings on this site. The zip code number is always the most reliable geographic identifier.

Question 9

What city is zip code 90001 in?

Accepted Answer

ZIP code 90001 is in Los Angeles, California, in Los Angeles County.

Question 10

What is the population of 90001?

Accepted Answer

The estimated population of ZIP code 90001 is approximately 57,652 residents (Census ACS 5-Year Estimates).

Question 11

What city is zip code 90002 in?

Accepted Answer

ZIP code 90002 is in Los Angeles, California, in Los Angeles County.

Question 12

What is the population of 90002?

Accepted Answer

The estimated population of ZIP code 90002 is approximately 53,108 residents (Census ACS 5-Year Estimates).

Question 13

What city is zip code 90003 in?

Accepted Answer

ZIP code 90003 is in Los Angeles, California, in Los Angeles County.

Question 14

What is the population of 90003?

Accepted Answer

The estimated population of ZIP code 90003 is approximately 75,024 residents (Census ACS 5-Year Estimates).

Question 15

What city is zip code 90004 in?

Accepted Answer

ZIP code 90004 is in Los Angeles, California, in Los Angeles County.

Question 16

What is the population of 90004?

Accepted Answer

The estimated population of ZIP code 90004 is approximately 58,833 residents (Census ACS 5-Year Estimates).

Question 17

What city is zip code 90005 in?

Accepted Answer

ZIP code 90005 is in Los Angeles, California, in Los Angeles County.

Question 18

What is the population of 90005?

Accepted Answer

The estimated population of ZIP code 90005 is approximately 37,754 residents (Census ACS 5-Year Estimates).

Question 19

What city is zip code 90006 in?

Accepted Answer

ZIP code 90006 is in Los Angeles, California, in Los Angeles County.

Question 20

What is the population of 90006?

Accepted Answer

The estimated population of ZIP code 90006 is approximately 56,628 residents (Census ACS 5-Year Estimates).

Question 21

What city is zip code 90007 in?

Accepted Answer

ZIP code 90007 is in Los Angeles, California, in Los Angeles County.

Question 22

What is the population of 90007?

Accepted Answer

The estimated population of ZIP code 90007 is approximately 41,004 residents (Census ACS 5-Year Estimates).

Question 23

What city is zip code 90008 in?

Accepted Answer

ZIP code 90008 is in Los Angeles, California, in Los Angeles County.

Question 24

What is the population of 90008?

Accepted Answer

The estimated population of ZIP code 90008 is approximately 33,076 residents (Census ACS 5-Year Estimates).

Question 25

What zip codes are in Los Angeles County, California?

Accepted Answer

Los Angeles County contains 538 zip codes in this directory, including 90001, 90210 and 91101. The full list is on the Los Angeles County page.

Question 26

What cities are near Sacramento, California?

Accepted Answer

The closest sizable cities to Sacramento are Elk Grove, Rancho Cordova, Folsom, Citrus Heights and Galt, all in Sacramento County, with Davis and Roseville just across the county line.

Question 27

What is the largest city by population in California?

Accepted Answer

Los Angeles is the largest city in California by population.

Question 28

What is a standard zip code vs a PO Box zip code?

Accepted Answer

A standard zip code serves a geographic delivery area for residential and business mail. A PO Box zip code is used exclusively for post office box addresses and does not correspond to a geographic delivery area.

Question 29

Can an address have a different city name than the actual city?

Accepted Answer

Yes. USPS sometimes assigns an acceptable city name to an address that differs from the actual incorporated municipality. The zip code is always the most reliable identifier.

Question 30

How often do zip codes change?

Accepted Answer

ZIP code changes are rare. The USPS occasionally assigns new zip codes to growing communities or consolidates zip codes in declining areas. This site is updated regularly.

Question 31

What does a unique zip code mean?

Accepted Answer

A unique zip code is assigned to a single high-volume mail recipient such as a large company, government agency, or university. It is not used for general address delivery.

California Zip Code Frequently Asked Questions

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