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Rancho Cucamonga city, CA

ZIP 91739 — People & Community

Source: U.S. Census Bureau ACS 2019–2023 5-Year Estimates. Page data updated 2026-08-02.

Upper Middle ClassLow Snow Area

Demographics, education attainment, health access, and community lifestyle

Population & Demographics in 91739

91739 has a population of 41,722 with a median age of 37.2 yrs (53.6% male).

Race & Ethnicity
White
42.3%-31% vs US avg
x
Black
9.7%-22% vs US avg
x
Asian
19.9%+236% vs US avg
x
Hispanic
34.1%+83% vs US avg
x
Age Groups
0–17
25.5%+16% vs US avg
x
18–64
66.0%+7% vs US avg
x
65+
8.6%-47% vs US avg
x
Education
Less than HS
8.1%-27% vs US avg
x
High school
17.4%-34% vs US avg
x
Some college
29.6%+2% vs US avg
x
Bachelor's+
44.9%+33% vs US avg
x
Marital Status
Married
55.6%+16% vs US avg
x
Never married
33.3%-1% vs US avg
x
Divorced
9.0%-13% vs US avg
x
Widowed / Separated
2.1%
x
Diversity Index
66/100

Higher = more diverse (Simpson index from race/ethnicity)

Social & household profile

Poverty, nativity, veterans, disability, family structure, and births (ACS).

Poverty Rate
6.1%-47% vs US avg
x
Foreign Born
26.7%+92% vs US avg
x
Veterans
4.1%-31% vs US avg
x
Disability
6.0%-55% vs US avg
x
Single Parent
6.2%-24% vs US avg
x
Recent Births
31.4%+442% vs US avg
x
Top ancestry
EnglishGermanAmerican

Health & Community Indicators in 91739

Poverty Rate
6.1%-47% vs US avg
x
Veterans
4.1%-31% vs US avg
x
Foreign Born
26.7%+92% vs US avg
x
Single Parent
6.2%-24% vs US avg
x
Disability
6.0%-55% vs US avg
x
Uninsured
3.4%-57% vs US avg
x
SNAP Benefits
3.5%-70% vs US avg
x
Private School
0.2%-98% vs US avg
x
Recent Births
31.4%+442% vs US avg
x
Smartphone Only
0.0%
x

People & Community key statistics

Population statistics
Population
Population41,722
Median age37.2
Poverty rate6.1%
Demographics statistics
Demographics
White42.3%
Hispanic34.1%
Black9.7%
Asian19.9%
Foreign-born26.7%