94931 ZIP Code — Cotati, CA
Sonoma County, California
ZIP code 94931 is located in Cotati, California, within Sonoma County. It covers approximately 7.74 square miles and serves a population of 8,945 residents. This is a standard ZIP code in the Pacific (PT) timezone, served by area code 707.
About ZIP code 94931
The housing stock consists of a mix of housing types. Most homes were built in the 1980s, giving the area an established character. Median home value is $720,400. Owner-occupancy sits near the national average at 60%.
Median household income is $98,475. The poverty rate of 7% is below the national average. 32% of households receive Social Security income, suggesting a notable retiree or disability population.
The dominant occupation class is management, business, and professional, with education and healthcare as the leading industry. The average commute of 28 minutes is near the national average.
Educational attainment is near the national average, with 36% of residents holding a bachelor's degree or higher.
8,945
population
7.74
sq mi land
Standard
ZIP type
Pacific (PT)
timezone
94931 ZIP code map
Cities in ZIP code 94931
Below are the cities the US Postal Service accepts for ZIP code 94931. Using any city not on this list may result in mail delivery delays.
| City | Status |
|---|---|
| Cotati | Preferred |
Nearby ZIP codes
94926 Rohnert Park (0.1 mi)
94928 Rohnert Park (1.3 mi)
94951 Penngrove (3.5 mi)
95407 Santa Rosa (5.2 mi)
94999 Petaluma (7.4 mi)
95405 Santa Rosa (8 mi)
94952 Petaluma (9.1 mi)
95404 Santa Rosa (9.4 mi)
95401 Santa Rosa (9.8 mi)
94954 Petaluma (10.6 mi)
95472 Sebastopol (10.6 mi)
95409 Santa Rosa (10.6 mi)
Demographics
updated 05/2026
| Population | |
|---|---|
| Total population | 8,945 |
| Population density | 1,156 / sq mi |
| State FIPS | 06 |
| County FIPS | 097 |
| Geography | |
|---|---|
| Land area | 7.74 sq mi |
| Water area | 0.01 sq mi |
| Latitude | 38.3256 |
| Longitude | -122.7041 |
| Timezone | Pacific (PT) |
| Area code | 707 |
Total population by age
Gender
Race & ethnicity
Economics
updated 05/2026
Household income
| Income range | This ZIP | County avg | State avg |
|---|---|---|---|
| Under $50k | 31.6% | 27.9% | 32.6% |
| $50k – $100k | 28.5% | 29.7% | 27.7% |
| $100k – $200k | 26.7% | 30.2% | 26.4% |
| Over $200k | 13.2% | 12.2% | 13.3% |
Demographics & statistics
8,945
Population
1,156
People per sq mi
40.1
Median age
$98,475
Median household income
$50,954
Per capita income
$720,400
Median home value
$1,708
Median monthly rent
60.2%
Home ownership
7.1%
Poverty rate
4.7%
Unemployment
2,428
Housing units
36.4%
Bachelor's or higher
Age distribution
Male
Female
276
Under 5
305
235
5–9
260
138
10–14
152
129
15–19
142
335
20–24
372
595
25–34
659
686
35–44
760
414
45–54
458
319
55–59
354
379
60–64
421
428
65–74
475
248
75–84
274
62
85+
69
← Male
Female →
Age summary
| Group | Count | % |
|---|---|---|
| Under 18 | 1,558 | 17.4% |
| 18 and over | 7,387 | 82.6% |
| 65 and over | 1,556 | 17.4% |
| Median age | 40.1 years | |
Race & ethnicity
White
69.3%
Two or more races
10.9%
Hispanic or Latino
10.3%
Other race
4.9%
American Indian / Alaska Native
2.1%
Asian
1.6%
Black or African American
0.7%
Native Hawaiian / Pacific Islander
0.2%
| Group | Count | % |
|---|---|---|
| White | 6,915 | 69.3% |
| Two or more races | 1,084 | 10.9% |
| Hispanic or Latino | 1,032 | 10.3% |
| Other race | 488 | 4.9% |
| American Indian / Alaska Native | 213 | 2.1% |
| Asian | 160 | 1.6% |
| Black or African American | 68 | 0.7% |
| Native Hawaiian / Pacific Islander | 17 | 0.2% |
Household income
| Income range | This ZIP | County avg | State avg |
|---|---|---|---|
| Under $50k | 31.6% | 27.9% | 32.6% |
| $50k – $100k | 28.5% | 29.7% | 27.7% |
| $100k – $200k | 26.7% | 30.2% | 26.4% |
| Over $200k | 13.2% | 12.2% | 13.3% |
Under $10k
3.4%
$10k–$15k
4.2%
$15k–$25k
2.1%
$25k–$35k
5.3%
$35k–$50k
11.1%
$50k–$75k
12.7%
$75k–$100k
12.1%
$100k–$150k
20.6%
$150k–$200k
12.8%
$200k+
15.8%
| Range | % of households |
|---|---|
| Under $10k | 3.4% |
| $10k–$15k | 4.2% |
| $15k–$25k | 2.1% |
| $25k–$35k | 5.3% |
| $35k–$50k | 11.1% |
| $50k–$75k | 12.7% |
| $75k–$100k | 12.1% |
| $100k–$150k | 20.6% |
| $150k–$200k | 12.8% |
| $200k+ | 15.8% |
| Median income | $98,475 |
Housing
Home values
Under $50k
2.0%
$50k–$100k
0.4%
$100k–$150k
3.8%
$150k–$200k
1.4%
$200k–$300k
1.6%
$300k–$500k
13.6%
$500k–$1M
57.9%
$1M+
19.2%
Housing overview
| Metric | Value |
|---|---|
| Median home value | $720,400 |
| Median rent / month | $1,708 |
| Owner occupied | 60.2% |
| Renter occupied | 39.8% |
| Vacant | 3.8% |
| Single-family detached | 62.6% |
| Large apartment buildings | 5.9% |
| Mobile homes | 2.3% |
| Median rooms | 4.9 |
| Avg household size (owned) | 2.55 |
Year built
| Era | % |
|---|---|
| 2020 or later | 0.7% |
| 2010–2019 | 2.4% |
| 2000–2009 | 10.8% |
| 1990–1999 | 12.3% |
| 1980–1989 | 28.2% |
| 1970–1979 | 23.3% |
| 1960–1969 | 5.9% |
| 1950–1959 | 12.1% |
| 1940–1949 | 1.8% |
| 1939 or earlier | 2.7% |
Bedrooms
| Size | % of units |
|---|---|
| No bedroom (studio) | 2.0% |
| 1 bedroom | 16.2% |
| 2 bedrooms | 28.4% |
| 3 bedrooms | 37.9% |
| 4 bedrooms | 14.1% |
| 5+ bedrooms | 1.5% |
Vehicles per household
| Vehicles | % of households |
|---|---|
| No vehicle | 2.7% |
| 1 vehicle | 32.3% |
| 2 vehicles | 42.0% |
| 3 or more | 23.0% |
Heating fuel
| Fuel type | % |
|---|---|
| Utility gas | 65.7% |
| Electricity | 25.4% |
| Propane / LP gas | 1.7% |
| Wood | 5.0% |
| Solar | 1.3% |
| No fuel used | 0.7% |
Households & families
| Household type | Count | % |
|---|---|---|
| Married-couple family | 1,655 | 43.7% |
| Cohabiting couple | 278 | 7.3% |
| Male householder, no spouse | 734 | 19.4% |
| Female householder, no spouse | 1,116 | 29.5% |
| Households with children under 18 | 931 | 24.6% |
| Households with seniors (65+) | 1,179 | 31.2% |
| Average household size | 2.36 | |
Marital status
| Status | Male | Female |
|---|---|---|
| Never married | 36.9% | 27.9% |
| Married | 53.3% | 47.2% |
| Separated | 0.0% | 1.3% |
| Widowed | 3.3% | 7.7% |
| Divorced | 6.4% | 16.0% |
Education
Less than 9th grade
2.5%
Some HS, no diploma
1.8%
HS graduate
19.7%
Some college, no degree
28.8%
Associate's degree
10.9%
Bachelor's degree
25.5%
Graduate / professional
10.9%
| Metric | % |
|---|---|
| HS diploma or higher | 95.7% |
| Bachelor's or higher | 36.4% |
School enrollment (ages 3–17)
| Type | Count | % |
|---|---|---|
| Nursery / preschool | 186 | 10.5% |
| Kindergarten | 144 | 8.1% |
| Elementary school | 549 | 31.0% |
| High school | 303 | 17.1% |
| College / grad school | 589 | 33.3% |
Employment
Industry of employment
Education & healthcare
21.6%
Retail trade
13.7%
Manufacturing
12.8%
Construction
12.5%
Professional & management
8.7%
Arts, food & hospitality
7.4%
Transportation & utilities
5.2%
Other services
4.5%
Public administration
3.9%
Finance & real estate
3.7%
Agriculture & mining
2.5%
Wholesale trade
2.3%
Information
1.0%
Occupation
| Category | % |
|---|---|
| Management, business & arts | 45.2% |
| Service | 13.6% |
| Sales & office | 21.2% |
| Natural resources & construction | 10.1% |
| Production & transportation | 9.9% |
Employment type
| Type | % |
|---|---|
| Private sector | 79.2% |
| Government | 13.6% |
| Self-employed | 7.1% |
| Unpaid family workers | 0.1% |
Commute
| Method | % |
|---|---|
| Drive alone | 73.9% |
| Carpool | 7.0% |
| Public transit | 3.1% |
| Walk | 0.8% |
| Work from home | 12.5% |
| Other means | 2.7% |
| Avg commute (minutes) | 27.8 |
Poverty
All people
7.1%
Under 18 years
5.2%
18 and over
7.4%
Married-couple families
1.9%
Female-led households
4.9%
Income support
| Source | % of households |
|---|---|
| Social Security | 31.8% |
| Retirement income | 25.7% |
| Supplemental Security | 5.7% |
| Cash public assistance | 3.0% |
| Food stamps / SNAP | 8.4% |
Health indicators
| Condition | % |
|---|---|
| Obesity | 25.3% |
| High blood pressure | 25.5% |
| High cholesterol | 26.5% |
| Diabetes | 8.0% |
| Heart disease | 4.9% |
| Stroke | 2.4% |
| Asthma | 10.5% |
| Arthritis | 21.3% |
| Kidney disease | 2.4% |
| Pulmonary disease | 5.9% |
| Cancer | 5.6% |
| Behavior / access | % |
|---|---|
| Smoking | 13.6% |
| Binge drinking | 20.6% |
| No physical activity | 18.3% |
| Less than 7 hrs sleep | 30.1% |
| Depression | 19.4% |
| Fair or poor health | 12.5% |
| Poor mental health | 15.4% |
| Poor physical health | 9.7% |
| No health insurance | 9.9% |
| Visited doctor (checkup) | 63.1% |
| Visited dentist | 64.3% |
| Cholesterol screening | 90.2% |
| Teeth loss | 10.1% |
Veterans & disability
| Veterans | Count | % |
|---|---|---|
| Civilian veterans | 505 | 6.8% |
| Disability | % |
|---|---|
| Any disability | 10.7% |
| Under 18 | 1.5% |
| 18–64 years | 7.9% |
| 65 and over | 30.1% |
Health insurance coverage
| Type | % |
|---|---|
| Private insurance | 81.3% |
| Public insurance | 30.3% |
| No insurance | 3.1% |
| Uninsured under 19 | 0.9% |
Language & origin
Language spoken at home (age 5+)
| Language | Count | % |
|---|---|---|
| English only | 8,364 | 93.5% |
| Spanish | 600 | 7.2% |
| Other Indo-European | 487 | 5.8% |
| Asian & Pacific Islander | 75 | 0.9% |
| Other languages | 38 | 0.5% |
Place of birth & citizenship
| Origin | Count | % |
|---|---|---|
| Native born (US) | 8,101 | 90.6% |
| Born in same state | 8,031 | 89.8% |
| Born in different state | 6,081 | 68.0% |
| Foreign born | 70 | 0.8% |
| Naturalized citizen | 844 | 9.4% |
| Not a US citizen | 482 | 57.1% |
Ancestry
| Ancestry | Count | % |
|---|---|---|
| Italian | 1,711 | 19.1% |
| French | 1,180 | 13.2% |
| English | 152 | 1.7% |
| Arab | 132 | 1.5% |
| Dutch | 93 | 1% |
| Ancestry | Count | % |
|---|---|---|
| Polish | 64 | 0.7% |
| Irish | 30 | 0.3% |
| German | 25 | 0.3% |
| Norwegian | 14 | 0.2% |
Technology access
| Metric | % of households |
|---|---|
| Computer access | 42.3% |
| Internet access | 97.1% |
Source: U.S. Census Bureau, American Community Survey 2025 estimates.
Frequently asked questions about ZIP code 94931
What city is ZIP code 94931 in?
ZIP code 94931 is primarily assigned to Cotati, California.
What county is ZIP code 94931 in?
ZIP code 94931 falls within Sonoma County, California.
What is the typical home value in ZIP code 94931?
The median home value in ZIP code 94931 is $720,400.
What is the population of ZIP code 94931?
ZIP code 94931 has an estimated population of 8,945 residents, with a density of 1,156 people per square mile.
What is the median household income in ZIP code 94931?
The median household income in ZIP code 94931 is $98,475, above the national median of ~$75,000.
What timezone is ZIP code 94931 in?
ZIP code 94931 observes the PST timezone.