The Dennis Otte Round Barn was built in 1930 by Herman Altenbern for Carl Richards near the community of Eleroy in Stephenson County, Illinois, United States.

Animal stalls are arranged on either side of the crib in a semi circular pattern, they are divided with hewn and sawed posts which support a concentric loft plate with a radius of about 27 feet (8.2 m).

Similarities are found in the single hip roof, the squat cupola and the special rafter bracing technique.

The use of salvaged materials reflects the Depression era economy during which the Otte Round Barn was constructed.

[2] The Otte Round Barn was added to the U.S. National Register of Historic Places on February 23, 1984 as part of a Multiple Property Submission.