Round and Octagonal Barns

Octagonal Barn Style
A Polygonal Barn
Hancock County, IN


Between the years of 1874-1936, 219 polygonal and round barns were constructed throughout Indiana. Polygonal barns with 6, 8, 9, 10, 12, 14, or 16-sides were predominately constructed between 1874-1900. Changes in technology - the advent of the circular silo with an elevator for moving feed, self-supporting roofs, and balloon framing - resulted in true round barns from 1889-1936. These new forms were cheaper, multi-functional, and had more open interiors, making them more efficient than rectangular barns of the time. 

Indiana once had more round barns than any other state, but their numbers are dwindling. As of 2017, there are only 73 of these historic barns remaining—we are down to one-third of the barns we once had. This map shows all of the historic round and polygonal barns that were once in Indiana and the ones that remain as of 2017. Newly constructed barns are not included. If you have updated information or photos, please email us at

If you would like to learn more about Indiana’s round/polygonal barns, please go to our database (SHAARD) at and search the IHSSI database for “round barn” or “polygonal barn.” If you know the name of a specific barn you are interested in, enter the name in the historic name field.