| Official Name: | Prince William |
| Mapsize: | 120px |
| Pushpin Map: | USA Indiana Carroll County |
| Pushpin Map Caption: | Location in Carroll County |
| Subdivision Type: | Country |
| Subdivision Name: | United States |
| Subdivision Type1: | State |
| Subdivision Name1: | Indiana |
| Subdivision Type2: | County |
| Subdivision Name2: | Carroll |
| Subdivision Type3: | Township |
| Subdivision Name3: | Democrat |
| Coordinates: | 40.4422°N -86.5731°W |
| Elevation Ft: | 722 |
| Postal Code Type: | ZIP code |
| Postal Code: | 46065 |
| Blank Name: | FIPS code |
| Blank Info: | 18-62075[1] |
| Blank1 Name: | GNIS feature ID |
| Blank1 Info: | 441601 |
Prince William is an unincorporated community in Democrat Township, Carroll County, Indiana.
Prince William was one of two initial villages when the township was organized in May 1835.[2] It was named for Prince William, Duke of Cumberland.[3] The Prince William post office was discontinued in 1881.[4]
Prince William, Indiana was founded in 1837 by Benjamin Ashba(Ashby). Prince William and Lexington were the major towns of Democrat Township until the 1870s.