91737 ZIP Code — Rancho Cucamonga, CA
San Bernardino County, California
ZIP code 91737 is located in Rancho Cucamonga, California, within San Bernardino County. It covers approximately 10.09 square miles and serves a population of 23,108 residents. This is a standard ZIP code in the Pacific (PT) timezone, served by area code 909.
About ZIP code 91737
The housing stock consists of predominantly single-family detached homes. Most homes were built in the 1980s, giving the area an established character. Median home value is $775,700. Owner-occupancy sits near the national average at 71%.
The gap between median ($112,857) and mean household income suggests income inequality — a small number of higher earners pull the average up. 31% 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 34 minutes is near the national average.
Educational attainment is near the national average, with 40% of residents holding a bachelor's degree or higher.
23,108
population
10.09
sq mi land
Standard
ZIP type
Pacific (PT)
timezone
91737 ZIP code map
Cities in ZIP code 91737
Below are the cities the US Postal Service accepts for ZIP code 91737. Using any city not on this list may result in mail delivery delays.
| City | Status |
|---|---|
| Rancho Cucamonga | Acceptable |
| Rancho Cucamonga | Preferred |
Nearby ZIP codes
91701 Rancho Cucamonga (0.8 mi)
91730 Rancho Cucamonga (3.7 mi)
91739 Rancho Cucamonga (3.8 mi)
91784 Upland (4.5 mi)
91764 Ontario (5.2 mi)
91786 Upland (5.9 mi)
92336 Fontana (6.8 mi)
91758 Ontario (7.4 mi)
91711 Claremont (8 mi)
92335 Fontana (8.1 mi)
92358 Lytle Creek (8.3 mi)
91761 Ontario (8.7 mi)
Demographics
updated 06/2026
| Population | |
|---|---|
| Total population | 23,108 |
| Population density | 2,290 / sq mi |
| State FIPS | 06 |
| County FIPS | 071 |
| Geography | |
|---|---|
| Land area | 10.09 sq mi |
| Water area | 0.00 sq mi |
| Latitude | 34.1526 |
| Longitude | -117.5791 |
| Timezone | Pacific (PT) |
| Area code | 909 |
Total population by age
Gender
Race & ethnicity
Economics
updated 06/2026
Household income
| Income range | This ZIP | County avg | State avg |
|---|---|---|---|
| Under $50k | 19.4% | 37.7% | 32.6% |
| $50k – $100k | 29.3% | 32.0% | 27.7% |
| $100k – $200k | 35.3% | 23.9% | 26.4% |
| Over $200k | 15.9% | 6.3% | 13.3% |
Demographics & statistics
23,108
Population
2,290
People per sq mi
43.5
Median age
$112,857
Median household income
$52,950
Per capita income
$775,700
Median home value
$2,308
Median monthly rent
70.8%
Home ownership
8.4%
Poverty rate
7.7%
Unemployment
5,958
Housing units
40.4%
Bachelor's or higher
Age distribution
Male
Female
656
Under 5
650
518
5–9
513
871
10–14
862
754
15–19
746
615
20–24
608
1,209
25–34
1,198
1,422
35–44
1,408
1,775
45–54
1,757
797
55–59
790
1,034
60–64
1,023
1,125
65–74
1,113
599
75–84
594
237
85+
234
← Male
Female →
Age summary
| Group | Count | % |
|---|---|---|
| Under 18 | 5,043 | 21.8% |
| 18 and over | 18,065 | 78.2% |
| 65 and over | 3,902 | 16.9% |
| Median age | 43.5 years | |
Race & ethnicity
White
46.6%
Hispanic or Latino
16.3%
Two or more races
11.5%
Asian
11.3%
Other race
8.8%
Black or African American
4.9%
American Indian / Alaska Native
0.6%
| Group | Count | % |
|---|---|---|
| White | 12,868 | 46.6% |
| Hispanic or Latino | 4,494 | 16.3% |
| Two or more races | 3,167 | 11.5% |
| Asian | 3,114 | 11.3% |
| Other race | 2,428 | 8.8% |
| Black or African American | 1,351 | 4.9% |
| American Indian / Alaska Native | 170 | 0.6% |
Household income
| Income range | This ZIP | County avg | State avg |
|---|---|---|---|
| Under $50k | 19.4% | 37.7% | 32.6% |
| $50k – $100k | 29.3% | 32.0% | 27.7% |
| $100k – $200k | 35.3% | 23.9% | 26.4% |
| Over $200k | 15.9% | 6.3% | 13.3% |
Under $10k
3.7%
$10k–$15k
3.2%
$15k–$25k
2.8%
$25k–$35k
4.1%
$35k–$50k
5.8%
$50k–$75k
11.8%
$75k–$100k
14.2%
$100k–$150k
17.4%
$150k–$200k
14.9%
$200k+
22.1%
| Range | % of households |
|---|---|
| Under $10k | 3.7% |
| $10k–$15k | 3.2% |
| $15k–$25k | 2.8% |
| $25k–$35k | 4.1% |
| $35k–$50k | 5.8% |
| $50k–$75k | 11.8% |
| $75k–$100k | 14.2% |
| $100k–$150k | 17.4% |
| $150k–$200k | 14.9% |
| $200k+ | 22.1% |
| Median income | $112,857 |
Housing
Home values
Under $50k
0.6%
$50k–$100k
1.6%
$100k–$150k
0.4%
$200k–$300k
1.8%
$300k–$500k
10.1%
$500k–$1M
61.0%
$1M+
24.6%
Housing overview
| Metric | Value |
|---|---|
| Median home value | $775,700 |
| Median rent / month | $2,308 |
| Owner occupied | 70.8% |
| Renter occupied | 29.2% |
| Vacant | 4.4% |
| Single-family detached | 76.1% |
| Large apartment buildings | 11.5% |
| Mobile homes | 0.1% |
| Median rooms | 6.6 |
| Avg household size (owned) | 2.93 |
Year built
| Era | % |
|---|---|
| 2020 or later | 0.1% |
| 2010–2019 | 2.5% |
| 2000–2009 | 10.2% |
| 1990–1999 | 12.6% |
| 1980–1989 | 50.6% |
| 1970–1979 | 19.6% |
| 1960–1969 | 3.2% |
| 1950–1959 | 0.7% |
| 1940–1949 | 0.0% |
| 1939 or earlier | 0.4% |
Bedrooms
| Size | % of units |
|---|---|
| No bedroom (studio) | 0.9% |
| 1 bedroom | 6.5% |
| 2 bedrooms | 15.4% |
| 3 bedrooms | 27.5% |
| 4 bedrooms | 38.5% |
| 5+ bedrooms | 11.3% |
Vehicles per household
| Vehicles | % of households |
|---|---|
| No vehicle | 3.9% |
| 1 vehicle | 18.5% |
| 2 vehicles | 36.8% |
| 3 or more | 40.9% |
Heating fuel
| Fuel type | % |
|---|---|
| Utility gas | 74.0% |
| Electricity | 21.9% |
| Propane / LP gas | 2.3% |
| Wood | 0.2% |
| Solar | 0.6% |
| No fuel used | 0.3% |
Households & families
| Household type | Count | % |
|---|---|---|
| Married-couple family | 5,141 | 65.1% |
| Cohabiting couple | 322 | 4.1% |
| Male householder, no spouse | 769 | 9.7% |
| Female householder, no spouse | 1,670 | 21.1% |
| Households with children under 18 | 2,637 | 33.4% |
| Households with seniors (65+) | 2,621 | 33.2% |
| Average household size | 2.92 | |
Marital status
| Status | Male | Female |
|---|---|---|
| Never married | 29.7% | 23.5% |
| Married | 60.7% | 57.3% |
| Separated | 1.0% | 1.1% |
| Widowed | 1.4% | 7.2% |
| Divorced | 7.2% | 11.0% |
Education
Less than 9th grade
2.1%
Some HS, no diploma
3.3%
HS graduate
21.0%
Some college, no degree
23.8%
Associate's degree
9.4%
Bachelor's degree
25.4%
Graduate / professional
15.0%
| Metric | % |
|---|---|
| HS diploma or higher | 94.7% |
| Bachelor's or higher | 40.4% |
School enrollment (ages 3–17)
| Type | Count | % |
|---|---|---|
| Nursery / preschool | 235 | 3.9% |
| Kindergarten | 145 | 2.4% |
| Elementary school | 2,245 | 37.0% |
| High school | 1,425 | 23.5% |
| College / grad school | 2,014 | 33.2% |
Employment
Industry of employment
Education & healthcare
26.6%
Retail trade
9.9%
Professional & management
9.9%
Public administration
9.6%
Arts, food & hospitality
8.1%
Transportation & utilities
7.9%
Manufacturing
7.1%
Construction
6.3%
Finance & real estate
5.6%
Other services
3.9%
Wholesale trade
2.9%
Information
2.0%
Agriculture & mining
0.3%
Occupation
| Category | % |
|---|---|
| Management, business & arts | 48.2% |
| Service | 14.7% |
| Sales & office | 22.0% |
| Natural resources & construction | 5.8% |
| Production & transportation | 9.4% |
Employment type
| Type | % |
|---|---|
| Private sector | 71.5% |
| Government | 22.0% |
| Self-employed | 6.5% |
| Unpaid family workers | 0.0% |
Commute
| Method | % |
|---|---|
| Drive alone | 77.2% |
| Carpool | 9.3% |
| Public transit | 1.0% |
| Walk | 1.1% |
| Work from home | 10.1% |
| Other means | 1.3% |
| Avg commute (minutes) | 33.9 |
Poverty
All people
8.4%
Under 18 years
9.3%
18 and over
8.1%
Married-couple families
3.8%
Female-led households
18.9%
Income support
| Source | % of households |
|---|---|
| Social Security | 31.0% |
| Retirement income | 28.8% |
| Supplemental Security | 4.7% |
| Cash public assistance | 2.4% |
| Food stamps / SNAP | 7.3% |
Health indicators
| Condition | % |
|---|---|
| Obesity | 34.8% |
| High blood pressure | 27.0% |
| High cholesterol | 30.7% |
| Diabetes | 8.7% |
| Heart disease | 4.5% |
| Stroke | 2.2% |
| Asthma | 9.8% |
| Arthritis | 19.2% |
| Kidney disease | 2.3% |
| Pulmonary disease | 4.6% |
| Cancer | 5.2% |
| Behavior / access | % |
|---|---|
| Smoking | 11.0% |
| Binge drinking | 19.5% |
| No physical activity | 17.7% |
| Less than 7 hrs sleep | 34.8% |
| Depression | 17.0% |
| Fair or poor health | 11.8% |
| Poor mental health | 13.9% |
| Poor physical health | 8.7% |
| No health insurance | 9.9% |
| Visited doctor (checkup) | 65.5% |
| Visited dentist | 70.0% |
| Cholesterol screening | 91.8% |
| Teeth loss | 8.7% |
Veterans & disability
| Veterans | Count | % |
|---|---|---|
| Civilian veterans | 1,141 | 6.3% |
| Disability | % |
|---|---|
| Any disability | 11.9% |
| Under 18 | 6.1% |
| 18–64 years | 7.8% |
| 65 and over | 34.6% |
Health insurance coverage
| Type | % |
|---|---|
| Private insurance | 73.8% |
| Public insurance | 33.7% |
| No insurance | 4.2% |
| Uninsured under 19 | 5.8% |
Language & origin
Language spoken at home (age 5+)
| Language | Count | % |
|---|---|---|
| English only | 21,802 | 94.3% |
| Spanish | 1,758 | 8.1% |
| Other Indo-European | 673 | 3.1% |
| Asian & Pacific Islander | 173 | 0.8% |
| Other languages | 805 | 3.7% |
Place of birth & citizenship
| Origin | Count | % |
|---|---|---|
| Native born (US) | 18,936 | 81.9% |
| Born in same state | 18,696 | 80.9% |
| Born in different state | 14,819 | 64.1% |
| Foreign born | 240 | 1.0% |
| Naturalized citizen | 4,172 | 18.1% |
| Not a US citizen | 2,615 | 62.7% |
Ancestry
| Ancestry | Count | % |
|---|---|---|
| Italian | 2,015 | 8.7% |
| French | 1,723 | 7.5% |
| Arab | 598 | 2.6% |
| English | 415 | 1.8% |
| Polish | 234 | 1% |
| Ancestry | Count | % |
|---|---|---|
| Dutch | 101 | 0.4% |
| German | 90 | 0.4% |
| Norwegian | 27 | 0.1% |
| Irish | 25 | 0.1% |
Technology access
| Metric | % of households |
|---|---|
| Computer access | 34.2% |
| Internet access | 97.8% |
Source: U.S. Census Bureau, American Community Survey 2025 estimates.
Frequently asked questions about ZIP code 91737
What city is ZIP code 91737 in?
ZIP code 91737 is primarily assigned to Rancho Cucamonga, California.
What county is ZIP code 91737 in?
ZIP code 91737 falls within San Bernardino County, California.
What is the typical home value in ZIP code 91737?
The median home value in ZIP code 91737 is $775,700.
What is the median household income in ZIP code 91737?
The median household income in ZIP code 91737 is $112,857, above the national median of ~$75,000.
What is the population of ZIP code 91737?
ZIP code 91737 has an estimated population of 23,108 residents, with a density of 2,290 people per square mile.
What timezone is ZIP code 91737 in?
ZIP code 91737 observes the PST timezone.