PlainZIP

Cotati, CA · standard

ZIP Code 94931

Sonoma County, California - Census ACS demographics, housing tenure, and business patterns, benchmarked against every US ZIP.

8,470
515/sq mi
$101,994
Median income
$820,000
Median home value
36.1%
Bachelor's or higher

The verdict

Cotati pairs an upper-quartile household income with top-decile home values, in a low-density, mixed-tenure area.

Top 18%
household income, US ZIPs
Top 4%
home value, US ZIPs
515
people per sq mi
59%
owner-occupied homes

Source: U.S. Census Bureau ACS 5-Year Estimates (2019–2023). Percentiles rank ZIP 94931 against every reporting US ZIP.

ZIP code 94931 is a mid-sized community (a standard USPS delivery area) in Cotati, Sonoma County, California, home to 8,470 residents across 16.5 square miles, a density of 515 people per square mile, in the Los Angeles time zone.

ZIP 94931 lands in the middle-income range, with a median household income of $101,994 (0% above the California average), while per-capita income is $55,275. 8.6% of residents live below the poverty line, and the unemployment rate reads 3.4%. Median home value sits at $820,000 (6% above the state average), median rent at $1,913 a month, and owner-occupancy at 59.2%.

A solid share of residents have a four-year degree: 36.1% of adults hold a bachelor's degree or higher, the median age is 39.2, and the average commute is 28 minutes. We also surface 9 nearby ZIP codes within roughly 10 miles and 6 additional ZIPs sharing Sonoma County, so you can benchmark 94931 against its immediate geography rather than a national average alone.

Every figure on this page is sourced from the U.S. Census Bureau American Community Survey 5-Year Estimates (including median rent) and the FHFA House Price Index, no estimates, no proprietary scoring. Verify with Census →

Top industries in ZIP 94931

Top 5 sectors by establishment count in Cotati, CA

Which industries have the most business establishments in ZIP 94931.

establishments

What this shows Establishment counts come from the Census ZIP Code Business Patterns program, which counts physical business locations rather than employees or revenue.

Source U.S. Census Bureau · ZIP Code Business Patterns (ZBP) As of 2023

Source: U.S. Census Bureau, American Community Survey 5-Year Estimates + ZIP Code Business Patterns + FHFA HPI ACS demographics and median rent, ZBP business establishments, FHFA HPI for ZIP 94931, Cotati, CA · 2023 Census ACS 5-Year Estimates use a rolling 60-month sample for stable small-geography estimates; ZBP updated annually; FHFA HPI updated quarterly/annually.

Quick Facts

8,470

Population

16.5

Area (sq mi)

515

People / sq mi

Los Angeles

Time Zone

standard

ZIP Type

Neighborhood Scorecard
Get an A-F grade across income, safety, housing, rent, education, commute, and childcare for this ZIP code.
View Scorecard →

Who lives in ZIP 94931?

39.2

Median Age

49.6%

Male

50.4%

Female

11.5%

Foreign-Born

White 69.6%
African American 1.1%
Asian 2.4%
American Indian or Alaska Native 2.8%
Native Hawaiian or Pacific Islander 0.0%
Two or More Ethnicities 13.7%
Hispanic or Latino 24.1%

Hispanic or Latino is an ethnicity category from the Census Bureau and may overlap with other categories above.

Source: U.S. Census Bureau, ACS 5-Year Estimates (2023)

How much do residents earn?

$101,994

Median Household Income

+0% vs state

$55,275

Per Capita Income

8.6%

Poverty Rate

3.4%

Unemployment Rate

27.8 min

Mean Commute Time

How ZIP 94931 ranks nationally

Cotati, CA household income vs. every US ZIP code

Median household income, the full national distribution, with this ZIP marked

$101,994 Top 18% higher than 82% of 30,318 US ZIPs

$0–$20,000: 118 US ZIPs (0%). Below this entry. $20,000–$40,000: 1,573 US ZIPs (5%). Below this entry. $40,000–$60,000: 7,092 US ZIPs (23%). Below this entry. $60,000–$80,000: 9,980 US ZIPs (33%). Below this entry. $80,000–$100,000: 5,778 US ZIPs (19%). Below this entry. $100,000–$120,000: 2,855 US ZIPs (9%). This entry sits in this band. $120,000–$140,000: 1,362 US ZIPs (4%). Above this entry. $140,000–$160,000: 686 US ZIPs (2%). Above this entry. $160,000–$180,000: 364 US ZIPs (1%). Above this entry. $180,000–$200,000: 186 US ZIPs (1%). Above this entry. $200,000–$220,000: 324 US ZIPs (1%). Above this entry. This ZIP $0 $200K+ every reporting US ZIP, bucketed by value

Each bar is a $20K-wide band; taller bars hold more US ZIPs. The dashed line + filled bar mark this entry. Hover or tap any bar for its full count, share, and where it sits relative to this entry.

Source U.S. Census Bureau, ACS 5-Year Estimates · 2019–2023

Source: U.S. Census Bureau, ACS 5-Year Estimates (2023)

What is the education profile here?

High School Graduate or Higher 54.8%
Bachelor's Degree or Higher 36.1%

Source: U.S. Census Bureau, ACS 5-Year Estimates (2023)

What does housing look like?

4,134

Total Housing Units

4,072

Occupied Units

62

Vacant Units

2.32

Avg Household Size

Occupancy Type

Owner 59.2%
Renter 40.8%

$820,000

Median Home Value

+6% vs state

$1,913

Median Rent

1982

Median Year Built

Source: U.S. Census Bureau, ACS 5-Year Estimates (2023)

How have home values changed over time?

FHFA House Price Index, annual appreciation data based on repeat sales and appraisals

+4.9%

YoY Change (2024)

266

HPI Index (2000 = 100)

+166%

Total Change Since 2000

Home values in ZIP 94931 have increased 4.9% over the past year (2024). Since 2000, this ZIP has seen +166% cumulative appreciation.

Year Annual Change HPI Index
2020 +2.1% 204
2021 +6.2% 217
2022 +10.5% 240
2023 +5.8% 254
2024 +4.9% 266

Source: Federal Housing Finance Agency (FHFA) House Price Index, All-Transactions, Five-Digit ZIP Codes (Developmental Index). Index base = 100 in year 2000. Data through 2024. ZIP codes with few transactions may show missing values.

What businesses operate in this ZIP?

Census Bureau data shows 324 business establishments in ZIP 94931, employing approximately 3,390 people with a combined annual payroll of $213,643,000.

324

Businesses

3,390

Employees

$213.6M

Annual Payroll

14

Industry Sectors

Industry Establishments % of Total
Construction 76 23.5%
Accommodation and food services 44 13.6%
Retail trade 42 13.0%
Other services (except public administration) 31 9.6%
Professional, scientific, and technical services 27 8.3%
Health care and social assistance 17 5.3%
Manufacturing 16 4.9%
Wholesale trade 16 4.9%
Administrative and support and waste management and remediation services 14 4.3%
Transportation and warehousing 11 3.4%
Real estate and rental and leasing 10 3.1%
Arts, entertainment, and recreation 7 2.2%
Finance and insurance 5 1.5%
Educational services 3 0.9%

Source: U.S. Census Bureau, ZIP Code Business Patterns (ZBP), 2023. Employment figures may include noise for disclosure avoidance.

Nearby ZIP Codes

Want a side-by-side? Compare 94931 vs 94928 →

ZIP 94931 vs its nearest neighbors, by population

Resident population of this ZIP and the closest reporting ZIP codes within ~10 miles.

residents

What this shows Among its immediate neighbors, ZIP 94931 ranks #9 by population - useful context the national average alone can't give.

Source U.S. Census Bureau · ACS 5-Year Estimates As of 2019–2023

ZIP 94931 vs its nearest neighbors, by median income

Median household income of this ZIP and the closest reporting ZIP codes within ~10 miles.

median income

What this shows By household income, ZIP 94931 ranks #7 of 9 neighboring ZIPs, local affluence varies block to block, not just metro to metro.

Source U.S. Census Bureau · ACS 5-Year Estimates As of 2019–2023
ZIP Code City Population Distance
94928 Rohnert Park, CA 43,170 1.9 mi
94951 Penngrove, CA 4,124 3.8 mi
95407 Santa Rosa, CA 39,352 5.1 mi
94952 Petaluma, CA 32,858 6.6 mi
95405 Santa Rosa, CA 21,399 8.2 mi
95401 Santa Rosa, CA 36,981 9.5 mi
95404 Santa Rosa, CA 39,761 10.3 mi
95472 Sebastopol, CA 28,255 9.6 mi
95409 Santa Rosa, CA 27,187 11.4 mi

More ZIP Codes in Sonoma County

95403 standard
Santa Rosa, CA
Pop: 45,164
94928 standard
Rohnert Park, CA
Pop: 43,170
95404 standard
Santa Rosa, CA
Pop: 39,761
95407 standard
Santa Rosa, CA
Pop: 39,352
94954 standard
Petaluma, CA
Pop: 37,365
95401 standard
Santa Rosa, CA
Pop: 36,981

Related Areas

Sonoma County Cotati, CA California

Frequently Asked Questions

What county is ZIP code 94931 in? ▼
ZIP code 94931 (Cotati) is located in Sonoma County, California. Sonoma County contains multiple ZIP codes, see the full list at /counties/sonoma-ca.
What is the population of ZIP code 94931? ▼
ZIP code 94931 in Cotati, CA has a population of 8,470 according to the Census Bureau ACS 2023 estimates.
What is the median household income in ZIP 94931? ▼
The median household income in ZIP 94931 is $101,994, which is 34% above the national average of $76,288.
What is the average home value in ZIP 94931? ▼
The median home value in ZIP 94931 is $820,000, which is 195% above the national average of $278,155.
What is the demographic makeup of ZIP 94931? ▼
The largest racial group in ZIP 94931 is White at 69.6%. Hispanic or Latino residents make up 24.1% of the population.
How many businesses are in ZIP code 94931? ▼
ZIP code 94931 has 324 business establishments employing approximately 3,390 people, according to Census Bureau ZIP Code Business Patterns (ZBP) 2023 data.
What are the main industries in ZIP code 94931? ▼
The top industries by establishment count in ZIP 94931 are: Construction (76), Accommodation and food services (44), Retail trade (42). There are 14 industry sectors represented in total.
How have home values changed in ZIP code 94931? ▼
According to the FHFA House Price Index, home values in ZIP 94931 increased by 4.9% in 2024. Since 2000, home values in this ZIP have appreciated by approximately 166%. This is a developmental index based on repeat sales and appraisal data from Fannie Mae and Freddie Mac.
What is the education level in ZIP code 94931? ▼
In ZIP code 94931, 54.8% of residents aged 25+ have a high school diploma or higher, and 36.1% hold a bachelor's degree or higher. These figures come from the Census Bureau ACS 5-Year Estimates (2023).
What is the average commute time in ZIP 94931? ▼
The mean commute time for workers in ZIP code 94931 is 27.8 minutes according to Census ACS data. The national average is roughly 26 minutes, so commuters here spend more time traveling to work than typical.
What percentage of residents own vs. rent in ZIP 94931? ▼
In ZIP code 94931, approximately 59.2% of occupied housing units are owner-occupied and 40.8% are renter-occupied, based on Census ACS 2023 data.
What is the poverty rate in ZIP code 94931? ▼
The poverty rate in ZIP code 94931 is 8.6% according to Census Bureau ACS 2023 estimates. This measures the percentage of the population living below the federal poverty threshold.

Read our methodology to see how this data is sourced, computed, and verified.