| Official Name: | Duncan Township, Michigan |
| Settlement Type: | Former civil township |
| Pushpin Map: | Michigan |
| Pushpin Label Position: | right |
| Pushpin Label: | Duncan Township |
| Pushpin Map Caption: | Location in the state of Michigan |
| Subdivision Type: | Country |
| Subdivision Name: | United States |
| Subdivision Type1: | State |
| Subdivision Name1: | Michigan |
| Subdivision Type2: | County |
| Subdivision Name2: | Cheboygan |
| Established Title: | Created |
| Established Date: | 1853 |
| Established Title1: | Organized |
| Established Date1: | 1854 |
| Established Title2: | Disestablished |
| Established Date2: | 1887 |
| Unit Pref: | Imperial |
| Timezone: | Eastern (EST) |
| Utc Offset: | -5 |
| Coordinates: | 45.62°N -84.3472°W |
Duncan Township was a civil township in Cheboygan County in the U.S. state of Michigan. It was created on January 29, 1853,[1] and organized on August 23, 1854.[2] As the second township in the county, it consisted of all parts east of the Cheboygan River.[3] Portions of this township were later incorporated into Benton Township in 1871, and Grant Township in 1879. The remnants of Duncan Township were combined with and incorporated into Benton Township on March 7, 1887.[4]