| Place Name | Fertile Township |
| Place Type | Township |
| ZIP Code(s) | 50434 50436 50444 50446 |
| County | Worth County |
| Area Code(s) | 641 |
| Timezone | Central Daylight Time (CDT) |
| Population (2021) | 691 |
| Majority Ethnicity | White 99.28% |
| Metro/Micro Stats Area | Mason City, IA |
| US Congressional District(s) | Iowa 1st |
| State House Districts | 51 |
| State Senate Districts | 26 |
| Race/Ethnicy | Percentage of Population (2021) |
|---|---|
| White | 99.28% |
| African American | 0% |
| Hispanic | 0% |
| Asian | 0% |
| Native American | 0% |
| Hawaiin/Pacific Islander | 0.72% |