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Walnut city, CA
ZIP 91789 — People & Community
Source: U.S. Census Bureau ACS 2019–2023 5-Year Estimates. Page data updated 2026-08-02.
Upper Middle ClassLow Snow AreaRemote Work Hub
Demographics, education attainment, health access, and community lifestyle
Population & Demographics in 91789
91789 has a population of 40,933 with a median age of 46.3 yrs (48.4% male).
Health & Community Indicators in 91789
Historical Trends in 91789 (2020–Present)
Since 2020, population declined 6.0%, median income rose 0.9% (inflation-adjusted), home values increased 3.8%.
People & Community key statistics
| Population | |
|---|---|
| Population | 40,933 |
| Median age | 46.3 |
| Poverty rate | 7.7% |
| Demographics | |
|---|---|
| White | 14.2% |
| Hispanic | 18.4% |
| Black | 2.1% |
| Asian | 67.6% |
| Foreign-born | 22.6% |