| Place Name | Haddam Township |
| Place Type | Township |
| ZIP Code(s) | 66935 66944 66960 |
| County | Washington County |
| Area Code(s) | 785 |
| Timezone | Central Daylight Time (CDT) |
| Population (2021) | 295 |
| Majority Ethnicity | White 100% |
| US Congressional District(s) | Kansas 1st |
| State House Districts | 106 |
| State Senate Districts | 36 |
| Race/Ethnicy | Percentage of Population (2021) |
|---|---|
| White | 100% |
| African American | 0% |
| Hispanic | 0% |
| Asian | 0% |
| Native American | 0% |
| Hawaiin/Pacific Islander | 0% |