List of octagonal buildings and structures in the United States

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The Octagon (Roosevelt Island, New York), once an insane asylum

Octagonal buildings and structures are characterized by an octagonal plan form, whether a perfect geometric octagon or a regular eight-sided polygon with approximately equal sides. Octagon-shaped buildings date from at least 300 B.C. when the Tower of the Winds in Athens, Greece, was constructed. Octagonal houses were popularized in the United States in the mid-19th century by Orson Squire Fowler and many other octagonal buildings and structures soon followed.

Octagonal buildings and structures in the United States, not including octagonal houses (which are covered at List of octagon houses) include the following. Many of these are on the National Register of Historic Places.

Barber shops[edit]

Churches, chapels, synagogues, etc.[edit]

Farm buildings including barns[edit]

Octagonal barn in Plain, Wisconsin


Government buildings[edit]


High rises[edit]

Hospitals and insane asylums[edit]




Daviess County Rotary Jail


Waring Library



City Market in Petersburg, Virginia

Park and fair buildings[edit]

Post offices[edit]

Schools and colleges[edit]

The former schoolhouse built in 1859 in Skaneateles, New York is now a private residence
Sodom Schoolhouse


See also[edit]


  1. ^ The Mount Washington Octagon
  2. ^ Cowles Hall 2010 renovation info, including photo of octagonal central structure
  3. ^ Coultas, Jennifer (Winter 2016). "Local Octagon Houses". Gem of the Mountains (newsletter of Boonton Historical Society & Museum). Retrieved October 4, 2022.