91739 ZIP Code — Rancho Cucamonga, CA
San Bernardino County, California
ZIP code 91739 is located in Rancho Cucamonga, California, within San Bernardino County. It covers approximately 28.42 square miles and serves a population of 41,319 residents. This is a standard ZIP code in the Pacific (PT) timezone, served by area code 909.
About ZIP code 91739
The housing stock consists of predominantly single-family detached homes. Most homes were built in the 2000s, giving the area an established character. Median home value is $798,600. Owner-occupancy sits near the national average at 73%.
The gap between median ($138,079) and mean household income suggests income inequality — a small number of higher earners pull the average up. The poverty rate of 5% is below the national average.
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 45% of residents holding a bachelor's degree or higher.
41,319
population
28.42
sq mi land
Standard
ZIP type
Pacific (PT)
timezone
91739 ZIP code map
Cities in ZIP code 91739
Below are the cities the US Postal Service accepts for ZIP code 91739. Using any city not on this list may result in mail delivery delays.
| City | Status |
|---|---|
| Rancho Cucamonga | Acceptable |
| Rancho Cucamonga | Acceptable |
| Rancho Cucamonga | Preferred |
Nearby ZIP codes
91730 Rancho Cucamonga (3.6 mi)
92336 Fontana (3.8 mi)
91737 Rancho Cucamonga (3.8 mi)
91701 Rancho Cucamonga (4.3 mi)
92335 Fontana (4.3 mi)
91764 Ontario (5 mi)
92337 Fontana (5.9 mi)
91761 Ontario (7.7 mi)
92377 Rialto (7.8 mi)
92376 Rialto (7.8 mi)
91784 Upland (8 mi)
91786 Upland (8.3 mi)
Demographics
updated 06/2026
| Population | |
|---|---|
| Total population | 41,319 |
| Population density | 1,454 / sq mi |
| State FIPS | 06 |
| County FIPS | 071 |
| Geography | |
|---|---|
| Land area | 28.42 sq mi |
| Water area | 0.01 sq mi |
| Latitude | 34.1246 |
| Longitude | -117.5214 |
| 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 | 14.1% | 37.7% | 32.6% |
| $50k – $100k | 23.3% | 32.0% | 27.7% |
| $100k – $200k | 38.3% | 23.9% | 26.4% |
| Over $200k | 24.3% | 6.3% | 13.3% |
Demographics & statistics
41,319
Population
1,454
People per sq mi
36.2
Median age
$138,079
Median household income
$52,167
Per capita income
$798,600
Median home value
$2,303
Median monthly rent
73.0%
Home ownership
4.8%
Poverty rate
4.9%
Unemployment
9,065
Housing units
44.5%
Bachelor's or higher
Age distribution
Male
Female
1,364
Under 5
1,147
1,636
5–9
1,376
1,656
10–14
1,392
1,386
15–19
1,165
1,160
20–24
976
3,627
25–34
3,051
3,171
35–44
2,667
3,638
45–54
3,059
1,668
55–59
1,403
1,066
60–64
896
1,532
65–74
1,289
473
75–84
397
67
85+
57
← Male
Female →
Age summary
| Group | Count | % |
|---|---|---|
| Under 18 | 10,068 | 24.4% |
| 18 and over | 31,251 | 75.6% |
| 65 and over | 3,815 | 9.2% |
| Median age | 36.2 years | |
Race & ethnicity
White
36.1%
Asian
16.7%
Hispanic or Latino
16.6%
Two or more races
13.2%
Black or African American
9.3%
Other race
7.3%
American Indian / Alaska Native
0.6%
Native Hawaiian / Pacific Islander
0.2%
| Group | Count | % |
|---|---|---|
| White | 17,871 | 36.1% |
| Asian | 8,279 | 16.7% |
| Hispanic or Latino | 8,214 | 16.6% |
| Two or more races | 6,530 | 13.2% |
| Black or African American | 4,615 | 9.3% |
| Other race | 3,636 | 7.3% |
| American Indian / Alaska Native | 299 | 0.6% |
| Native Hawaiian / Pacific Islander | 89 | 0.2% |
Household income
| Income range | This ZIP | County avg | State avg |
|---|---|---|---|
| Under $50k | 14.1% | 37.7% | 32.6% |
| $50k – $100k | 23.3% | 32.0% | 27.7% |
| $100k – $200k | 38.3% | 23.9% | 26.4% |
| Over $200k | 24.3% | 6.3% | 13.3% |
Under $10k
2.2%
$10k–$15k
1.1%
$15k–$25k
0.8%
$25k–$35k
2.7%
$35k–$50k
3.8%
$50k–$75k
11.7%
$75k–$100k
8.8%
$100k–$150k
24.2%
$150k–$200k
14.4%
$200k+
30.3%
| Range | % of households |
|---|---|
| Under $10k | 2.2% |
| $10k–$15k | 1.1% |
| $15k–$25k | 0.8% |
| $25k–$35k | 2.7% |
| $35k–$50k | 3.8% |
| $50k–$75k | 11.7% |
| $75k–$100k | 8.8% |
| $100k–$150k | 24.2% |
| $150k–$200k | 14.4% |
| $200k+ | 30.3% |
| Median income | $138,079 |
Housing
Home values
Under $50k
0.7%
$50k–$100k
0.3%
$100k–$150k
0.9%
$150k–$200k
0.1%
$200k–$300k
0.2%
$300k–$500k
12.9%
$500k–$1M
58.6%
$1M+
26.2%
Housing overview
| Metric | Value |
|---|---|
| Median home value | $798,600 |
| Median rent / month | $2,303 |
| Owner occupied | 73.0% |
| Renter occupied | 27.0% |
| Vacant | 5.0% |
| Single-family detached | 73.1% |
| Large apartment buildings | 10.5% |
| Mobile homes | 0.0% |
| Median rooms | 6.5 |
| Avg household size (owned) | 3.58 |
Year built
| Era | % |
|---|---|
| 2020 or later | 0.0% |
| 2010–2019 | 15.1% |
| 2000–2009 | 46.8% |
| 1990–1999 | 15.9% |
| 1980–1989 | 15.2% |
| 1970–1979 | 2.3% |
| 1960–1969 | 2.9% |
| 1950–1959 | 1.2% |
| 1940–1949 | 0.1% |
| 1939 or earlier | 0.6% |
Bedrooms
| Size | % of units |
|---|---|
| No bedroom (studio) | 0.3% |
| 1 bedroom | 5.6% |
| 2 bedrooms | 13.0% |
| 3 bedrooms | 28.5% |
| 4 bedrooms | 34.2% |
| 5+ bedrooms | 18.3% |
Vehicles per household
| Vehicles | % of households |
|---|---|
| No vehicle | 1.9% |
| 1 vehicle | 16.4% |
| 2 vehicles | 44.7% |
| 3 or more | 37.0% |
Heating fuel
| Fuel type | % |
|---|---|
| Utility gas | 82.6% |
| Electricity | 13.4% |
| Propane / LP gas | 2.4% |
| Wood | 0.1% |
| Solar | 0.8% |
| No fuel used | 0.4% |
Households & families
| Household type | Count | % |
|---|---|---|
| Married-couple family | 7,681 | 66.3% |
| Cohabiting couple | 520 | 4.5% |
| Male householder, no spouse | 1,594 | 13.8% |
| Female householder, no spouse | 1,791 | 15.5% |
| Households with children under 18 | 4,774 | 41.2% |
| Households with seniors (65+) | 2,552 | 22.0% |
| Average household size | 3.34 | |
Marital status
| Status | Male | Female |
|---|---|---|
| Never married | 37.0% | 30.7% |
| Married | 53.6% | 55.1% |
| Separated | 2.9% | 1.9% |
| Widowed | 0.6% | 4.1% |
| Divorced | 5.9% | 8.2% |
Education
Less than 9th grade
2.4%
Some HS, no diploma
5.7%
HS graduate
15.2%
Some college, no degree
23.0%
Associate's degree
9.2%
Bachelor's degree
25.7%
Graduate / professional
18.8%
| Metric | % |
|---|---|
| HS diploma or higher | 91.9% |
| Bachelor's or higher | 44.5% |
School enrollment (ages 3–17)
| Type | Count | % |
|---|---|---|
| Nursery / preschool | 656 | 5.4% |
| Kindergarten | 639 | 5.3% |
| Elementary school | 4,716 | 38.9% |
| High school | 2,385 | 19.7% |
| College / grad school | 3,722 | 30.7% |
Employment
Industry of employment
Education & healthcare
25.8%
Professional & management
12.4%
Retail trade
10.8%
Arts, food & hospitality
7.9%
Finance & real estate
7.6%
Transportation & utilities
7.4%
Public administration
6.9%
Manufacturing
6.4%
Construction
4.3%
Other services
3.8%
Information
3.5%
Wholesale trade
2.9%
Agriculture & mining
0.2%
Occupation
| Category | % |
|---|---|
| Management, business & arts | 52.9% |
| Service | 15.5% |
| Sales & office | 18.4% |
| Natural resources & construction | 3.7% |
| Production & transportation | 9.6% |
Employment type
| Type | % |
|---|---|
| Private sector | 72.4% |
| Government | 20.9% |
| Self-employed | 6.3% |
| Unpaid family workers | 0.4% |
Commute
| Method | % |
|---|---|
| Drive alone | 73.3% |
| Carpool | 9.7% |
| Public transit | 2.2% |
| Walk | 0.0% |
| Work from home | 13.2% |
| Other means | 1.6% |
| Avg commute (minutes) | 33.9 |
Poverty
All people
4.8%
Under 18 years
4.5%
18 and over
5.0%
Married-couple families
2.2%
Female-led households
11.7%
Income support
| Source | % of households |
|---|---|
| Social Security | 18.6% |
| Retirement income | 17.3% |
| Supplemental Security | 3.4% |
| Cash public assistance | 3.5% |
| Food stamps / SNAP | 3.6% |
Health indicators
| Condition | % |
|---|---|
| Obesity | 33.2% |
| High blood pressure | 22.9% |
| High cholesterol | 26.8% |
| Diabetes | 7.3% |
| Heart disease | 3.2% |
| Stroke | 1.6% |
| Asthma | 9.1% |
| Arthritis | 14.8% |
| Kidney disease | 1.8% |
| Pulmonary disease | 3.3% |
| Cancer | 3.9% |
| Behavior / access | % |
|---|---|
| Smoking | 9.9% |
| Binge drinking | 20.3% |
| No physical activity | 16.4% |
| Less than 7 hrs sleep | 35.2% |
| Depression | 15.8% |
| Fair or poor health | 10.0% |
| Poor mental health | 13.4% |
| Poor physical health | 7.2% |
| No health insurance | 10.3% |
| Visited doctor (checkup) | 63.3% |
| Visited dentist | 70.7% |
| Cholesterol screening | 91.3% |
| Teeth loss | 7.1% |
Veterans & disability
| Veterans | Count | % |
|---|---|---|
| Civilian veterans | 1,416 | 4.5% |
| Disability | % |
|---|---|
| Any disability | 6.4% |
| Under 18 | 1.9% |
| 18–64 years | 5.1% |
| 65 and over | 27.0% |
Health insurance coverage
| Type | % |
|---|---|
| Private insurance | 79.3% |
| Public insurance | 23.5% |
| No insurance | 4.1% |
| Uninsured under 19 | 0.6% |
Language & origin
Language spoken at home (age 5+)
| Language | Count | % |
|---|---|---|
| English only | 38,808 | 93.9% |
| Spanish | 3,879 | 10.0% |
| Other Indo-European | 1,189 | 3.1% |
| Asian & Pacific Islander | 341 | 0.9% |
| Other languages | 2,004 | 5.2% |
Place of birth & citizenship
| Origin | Count | % |
|---|---|---|
| Native born (US) | 32,237 | 78.0% |
| Born in same state | 31,984 | 77.4% |
| Born in different state | 26,038 | 63.0% |
| Foreign born | 253 | 0.6% |
| Naturalized citizen | 9,082 | 22.0% |
| Not a US citizen | 6,059 | 66.7% |
Ancestry
| Ancestry | Count | % |
|---|---|---|
| French | 2,568 | 6.2% |
| Italian | 2,054 | 5% |
| Arab | 1,216 | 2.9% |
| Polish | 295 | 0.7% |
| Ancestry | Count | % |
|---|---|---|
| Dutch | 174 | 0.4% |
| English | 153 | 0.4% |
| German | 38 | 0.1% |
| Norwegian | 18 | 0% |
Technology access
| Metric | % of households |
|---|---|
| Computer access | 28.0% |
| Internet access | 99.2% |
Source: U.S. Census Bureau, American Community Survey 2025 estimates.
Frequently asked questions about ZIP code 91739
What city is ZIP code 91739 in?
ZIP code 91739 is primarily assigned to Rancho Cucamonga, California.
What county is ZIP code 91739 in?
ZIP code 91739 falls within San Bernardino County, California.
What is the median household income in ZIP code 91739?
The median household income in ZIP code 91739 is $138,079, above the national median of ~$75,000.
What is the typical home value in ZIP code 91739?
The median home value in ZIP code 91739 is $798,600.
What is the population of ZIP code 91739?
ZIP code 91739 has an estimated population of 41,319 residents, with a density of 1,454 people per square mile.
What timezone is ZIP code 91739 in?
ZIP code 91739 observes the PST timezone.