Demographics & People — Fairfield, California
Population Overview
| Population (Census) | 119,985 |
| Estimated 2026 | ~122,700 |
| Median Age | 36.9 |
| Total Households | 37,955 |
| Family Households | 28,380 |
| Average Household Size | 3.11 |
| Diversity Index | 0.7185 (highly diverse) |
Race & Ethnicity
| White | 43,137 |
| Black or African American | 18,325 |
| Asian | 20,913 |
| Hispanic or Latino | 38,135 |
Heritage & Ancestry
| Group | Count |
| Other groups | 66,518 |
| Hispanic: Hispanic or Latino | 35,698 |
| Hispanic: Mexican | 29,887 |
| Unclassified or not reported | 21,679 |
| European | 8,162 |
| Irish | 6,153 |
| German | 5,537 |
| English | 5,207 |
| Subsaharan African | 4,308 |
| African | 3,676 |
Language
| English Only | 73,040 |
| Spanish | 23,642 |
| Population 5+ | 112,317 |
Veterans
| Veterans | 7,424 |
| Population 18+ | 88,094 |
Commuting
| Mean Commute Time | 30.7 minutes |
| Work from Home | 11.6% |
| Commuter Profile | N/A |
Source: Census ACS 5-Year 2023; Census ACS 5-Year 2023, Table B01003; Census ACS 5-Year 2023, B19013. Data for Fairfield, California.