Duncan, Illinois
Duncan is an unincorporated community in Stark County, Illinois, United States, located   north-northwest of Princeville. History
Duncan was laid out ca. 1870. The community is named for James H. Duncan, a United States Congressman from Massachusetts from 1849 to 1853. References

Unincorporated communities in Stark County, Illinois
Unincorporated communities in Illinois
Peoria metropolitan area, Illinois