| Unit Pref: | Imperial |
| Settlement Type: | Township |
| Official Name: | Dewey Township |
| Mapsize: | 250px |
| Subdivision Type: | Country |
| Subdivision Name: | United States |
| Subdivision Type1: | State |
| Subdivision Name1: | North Dakota |
| Subdivision Type2: | County |
| Subdivision Name2: | Walsh County |
| Established Title: | Established |
| Area Total Km2: | 93.499 |
| Area Total Sq Mi: | 36.1 |
| Area Land Km2: | 92.204 |
| Area Land Sq Mi: | 35.6 |
| Area Water Km2: | 1.295 |
| Area Water Sq Mi: | 0.5 |
| Population Total: | 43[1] |
| Utc Offset: | -6 |
| Timezone Dst: | CDT |
| Utc Offset Dst: | -5 |
Dewey Township is a township in Walsh County, North Dakota, United States. 53.5% (23) of the population are male, and the other 46.5% (20) are female.[2]