| Place Name | Fairfield Township (Buena Vista County) |
| Place Type | Township |
| ZIP Code(s) | 50510 |
| County | Buena Vista County |
| Area Code(s) | 712 |
| Timezone | Central Standard Time (CST) |
| Population (2021) | 813 |
| Majority Ethnicity | White 97.33% |
| Metro/Micro Stats Area | Storm Lake, IA |
| US Congressional District(s) | Iowa 4th |
| State House Districts | 11 |
| State Senate Districts | 6 |
| Race/Ethnicy | Percentage of Population (2021) |
|---|---|
| White | 97.33% |
| African American | 0.51% |
| Hispanic | 0% |
| Asian | 0% |
| Native American | 0% |
| Hawaiin/Pacific Islander | 2.16% |