| Name | Fairfield County |
| State | Ohio |
| FIPS Code | 39045 |
| County Seat | Lancaster |
| Timezone | Eastern Daylight Time (EDT) |
| Population (2024) | 165,630 |
| Population Growth Rate(2020-2024) | 4.05% |
| Majority Ethnicity | White 85.19% |
| Public School Majority Ethnicity | White 72% |
| Partisan Voting Index | Republican:+13 |
| Unemployment Rate (May 2026) | 4.1% |
| Sales Tax Rate (2025) | 6.75% |
| Area Code(s) | 220 / 740 / 380 / 614 |
| Race/Ethnicity | Percentage of Population (2023) |
|---|---|
| White | 85.19% |
| African American | 9.16% |
| Hispanic | 2.74% |
| Asian | 2.67% |
| Native American | 0.15% |
| Hawaiin/Pacific Islander | 0.09% |
| Race/Ethnicity | Percentage of Public School Students (2023) |
|---|---|
| White | 72.4% |
| African American | 14.4% |
| Hispanic | 3.97% |
| Asian | 3.11% |
| Native American | 0.13% |
| Hawaiin/Pacific Islander | 0.05% |