| Place Name | Fairfield |
| Place Type | Census Designated Place |
| ZIP Code(s) | 37186 |
| County | Sumner County |
| Area Code(s) | 615,629 |
| Timezone | Central Standard Time (CST) |
| Population (2022) | 314 |
| Population Growth Rate (2010-19) | 7.63% |
| Majority Ethnicity | White 100% |
| Metro/Micro Stats Area | Nashville-Davidson--Murfreesboro--Franklin, TN |
| US Congressional District(s) | Tennessee 6th |
| State House Districts | 44 |
| State Senate Districts | 18 |
| Race/Ethnicy | Percentage of Population (2021) |
|---|---|
| White | 100% |
| African American | 0% |
| Hispanic | 0% |
| Asian | 0% |
| Native American | 0% |
| Hawaiin/Pacific Islander | 0% |