Tonsfeldt Round Barn
Many listed buildings are private homes. Please enjoy them from the street.
About Tonsfeldt Round Barn
Tonsfeldt Round Barn, at Plymouth County Fairgrounds, was added to the National Register of Historic Places on Nov 19, 1986. It was among the first 4 of Le Mars’s 8 listings. The Register lists it for its agriculture, at the state level. It was listed as part of Iowa Round Barns: The Sixty Year Experiment TR.
What it isRound barn in Le Mars, Iowa. From Wikidata (CC0). Read about it on Wikipedia ↗
PDFRead the original nominationThe form that put it on the Register, with its history, photos and a map · 17 MB · National Archives↗Finding Tonsfeldt Round Barn
Plymouth County Fairgrounds, Le Mars
No other Register listing is within a short walk. The nearest are under Around it.
6 more Register listings within 2 miles
★ National Historic Landmark · D district · B building · S site. Each opens its own page.
Memories of Tonsfeldt Round Barn
The record says what it is. Neighbors know what it means.
Your answer becomes a post in Town Square.
Questions about Tonsfeldt Round Barn
Is Tonsfeldt Round Barn on the National Register of Historic Places?
Yes. It was added on Nov 19, 1986 (Register number 86003194).
Is Tonsfeldt Round Barn a National Historic Landmark?
No. It is on the National Register; Iowa has 22 National Historic Landmarks. The nearest is Woodbury County Courthouse, 23.5 miles away.
Can you visit Tonsfeldt Round Barn?
Our record doesn’t say whether it is open to visitors. Many listed buildings are private, so it may only be seen from the street.
Where can I read the history of Tonsfeldt Round Barn?
In its National Register nomination, the form that put it on the Register: a 17 MB PDF at the National Archives, linked on this page.
Sources: National Park Service, National Register of Historic Places (05/22/2026) · National Archives catalog record 75337214 · Wikidata. Map tiles © OpenStreetMap contributors.