Every ZIP code in the United States, with weather, radar, trivia and the numbers behind it. Five digits since 1963!

ZIP stands for Zone Improvement Plan. The codes went live on July 1, 1963.The lowest ZIP code is 00501 — the IRS in Holtsville, New York.The highest ZIP code is 99950, in Ketchikan, Alaska.Type 07734 into a calculator and turn it upside down: hELLO. It is Keansburg, New Jersey.12345 belongs to one company: General Electric in Schenectady, New York.The first digit is a region: 0 is New England and New Jersey, 9 is the West Coast, Alaska and Hawaii.Mr. ZIP, the cartoon mailman, was the mascot that sold the idea to America.ZIP+4 arrived in 1983 and can narrow a ZIP down to one side of one block.A ZIP code is a mail route, not a place: plenty of them cross county and even state lines.Play ZIP Hunt: guess the secret ZIP code of the day in six tries.
zipcodes.pro — CITY/CA/FAIRFAX

Fairfax ZIP codes, California

Fairfax, CA has 2 ZIP codes (94930 and 94978) and area codes 415 and 628. The largest is 94930.

USPS city name
2 ZIP codes
Overlapping the city
1 more
Population
7,516
Area codes
415, 628

NANPA lists no telephone rate centre for Fairfax itself, so these are the area codes of the nearest one, Mill Valley (3.2 miles). A town on an area-code boundary can differ from its neighbour.

Mail addressed to Fairfax uses the ZIP codes above. 1 more ZIP code covers part of the city but is addressed as somewhere else; they are listed separately below.

Fairfax in numbers

About 7,516 people live in Fairfax, in 3,265 households. The median household income is $141,653 a year, 43% above the California median of $99,122 (US: $80,734). The median owner-occupied home is valued at $1,163,600 (58% above the California median), and median gross rent is $2,367 a month. The median age is 48.7; 70.1% of adults 25 and over hold a bachelor's degree or higher (37.1% across California); the average commute takes 29 minutes.

Population7,516Fairfax7,516
Households3,265Fairfax3,265
Median age48.7Fairfax48.7California37.9US 38.9
Median household income$141,653Fairfax$141,653California$99,122US $80,734
Median home value$1,163,600Fairfax$1,163,600California$734,700US $332,700
Median gross rent$2,367Fairfax$2,367California$2,036US $1,413
Bachelor's degree or higher70.1%Fairfax70.1%California37.1%US 35.7%
Mean commute28.6 minFairfax28.6 minCalifornia28.7 minUS 26.4 min
Population density3,373 / sq miFairfax3,373 / sq mi

U.S. Census Bureau, American Community Survey 2020–2024 5-year estimates, for the census place Fairfax town. Survey estimates carry margins of error, wider for small places. Sources and methods.

ZIP codes addressed as Fairfax

ZIP codes with the USPS city name Fairfax
ZIP City Type Population Median income Median home
94930 Fairfax , CA Standard 8,406 $145,362 $1,170,000
94978 Fairfax , CA No street area — — —

Other ZIP codes overlapping Fairfax

These ZIP codes cover part of Fairfax but are addressed as somewhere else.

ZIP codes overlapping Fairfax
ZIP City Type Population Median income Median home
94960 San Anselmo , CA Standard 16,232 $185,170 $1,674,500

Map of Fairfax ZIP codes

9493094978

The ZIP codes of Fairfax, CA, shaded. Outlines are Census ZIP Code Tabulation Areas (2020), which approximate the mail routes; PO-box and single-address codes have no area and are not drawn. Click any area to open its ZIP code.

Towns near Fairfax

The nearest larger towns are San Anselmo (12,679 people, 1.4 mi), San Rafael (60,433 people, 4.8 mi) and Larkspur (12,854 people, 4.8 mi).

Towns near Fairfax
TownPopulationDistance
San Anselmo 12,679 1.4 mi
Sleepy Hollow 3,063 1.7 mi
Ross 2,606 2.5 mi
Lucas Valley-Marinwood 6,473 3.7 mi
Kentfield 6,900 4.1 mi
San Rafael 60,433 4.8 mi
Larkspur 12,854 4.8 mi
Santa Venetia 3,725 5.2 mi
Corte Madera 10,077 6.2 mi
Mill Valley 14,012 6.3 mi
Novato 52,546 7.1 mi
Tamalpais-Homestead Valley 12,085 8.2 mi
Strawberry 5,830 8.2 mi
Marin City 3,195 9.2 mi

More nearby: every ZIP code in Marin County · California ZIP codes

Cite this page

zipcodes.pro. “Fairfax, CA ZIP codes.” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/city/ca/fairfax

Underlying data is public domain or openly licensed — sources, vintages and licences.