| William Hill Polygonal Barn | |
| Location: | School St., Bloomingdale, Indiana |
| Coordinates: | 39.8136°N -87.2514°W |
| Builder: | Hill, William |
| Architecture: | Eight-sided barn |
| Added: | April 2, 1993 |
| Area: | less than one acre |
| Mpsub: | Round and Polygonal Barns of Indiana MPS |
| Refnum: | 93000186 |
William Hill Polygonal Barn, also known as the Hill-Mershon Barn, is an eight-sided barn located at Bloomingdale, Parke County, Indiana. It was built about 1905, and is a two-story, octagonal frame building. It measures 30 feet in width and is topped by a sectional cone roof topped by an octagonal cupola.[1]
It was added to the National Register of Historic Places in 1993.