What is the largest city in Mendocino County, CA?

Ukiah is the largest city or town in Mendocino County, with about 16,304 residents.

How many ZIP codes are in Mendocino County?

Mendocino County includes 26 ZIP Code Tabulation Areas, including 95410, 95415, 95417, 95420, 95427.

What is the population of Mendocino County, CA?

About 90,244 people live in Mendocino County, based on American Community Survey 5-year estimates.

What counties border Mendocino County?

Mendocino County borders Sonoma County, Humboldt County, Lake County, Tehama County, Glenn County, Trinity County.

Mendocino County, CA: Cities, ZIP Codes & Local Data

Population

90,244

Land area

3,507sq mi

People per sq mi

26

ZIP codes

26

Mendocino County at a glance

Mendocino County is 90% less dense than California as a whole.
Households here earn a median of $68,092 a year, 31% less than the California figure of $99,122.
A typical owner-occupied home is valued at $512,200 (30% below California) and median rent is $1,317 a month.
The biggest population centers are Ukiah (16,304), Fort Bragg (7,032) and Willits (4,920).

Local data for Mendocino County, CA

Counts from official public data

Housing and community stats

Mendocino County, CA, American Community Survey 2020-2024

Full profile

Median household income

$68,092

Poverty rate

15.4%

Median home value

$512,200

Prices +0.7% in a year

Median rent

$1,317/mo

Homeownership

61.7%

Bachelor's or higher

25.2%

Median age

44.1

Average commute

21.5 min

Largest reported origins and ancestries: Mexican Americans (22,098), German Americans (10,890), Irish Americans (8,654).

Home values and rents Income, education and commute

Economy and federal money

Jobs, income, federal spending and pandemic loans

Details

Unemployment rate

5.6%

Aug 2026, -0.3 pts in a year

Average annual pay

$55,431

31,998 jobs, 2025

Income per person

$62,438

BEA, 2024

Federal spending

$663M

FY 2026, $7,235 per person

PPP loans

$163M

2,117 loans, 20,919 jobs reported

Campaign donations

$596K

Itemized, 2026 cycle

Economy Federal spending PPP loans

How people get to work

Mendocino County, CA, workers 16 and older. American Community Survey 5-year estimates

Drove alone70.9%
Carpooled10.0%
Public transit0.2%
Walked5.9%
Bicycle0.3%
Taxi, ride-hailing, motorcycle or other0.6%
Worked from home12.2%

Average one-way commute: 21.5 minutes for people who do not work from home.

Environment and hazard risk

Mendocino County, CA, from FEMA, NOAA and EPA

Full report

Natural hazard risk

Relatively High

Top: landslide

Storm events since 1996

346

Most often winter weather

Flood insurance policies

339

1.0% of homes, county

July high / Jan low

84° / 33°F

49.2 inches of rain a year

Hazards, floods and storm history Check a flood zone 36 historic places

Health statistics

Share of adults in Mendocino County, CA, CDC PLACES estimates

All 40 measures

Obesity

29.3%

U.S. 33.3% -4.0 pts

Diabetes

13.7%

U.S. 12.1% +1.6 pts

Smoking

14.3%

U.S. 12.8% +1.5 pts

Uninsured (18-64)

10.3%

U.S. 11.1% -0.8 pts

Cities, towns and ZIP codes in Mendocino County

Population shown

Frequently asked questions

What is the largest city in Mendocino County, CA?: Ukiah is the largest city or town in Mendocino County, with about 16,304 residents.
How many ZIP codes are in Mendocino County?: Mendocino County includes 26 ZIP Code Tabulation Areas, including 95410, 95415, 95417, 95420, 95427.
What is the population of Mendocino County, CA?: About 90,244 people live in Mendocino County, based on American Community Survey 5-year estimates.
What counties border Mendocino County?: Mendocino County borders Sonoma County, Humboldt County, Lake County, Tehama County, Glenn County, Trinity County.