Union Block
Many listed buildings are private homes. Please enjoy them from the street.
About Union Block
Union Block, at 21--25 Main St. W, was added to the National Register of Historic Places on Nov 20, 1985. The Register lists it for its architecture, at the local level. Eight more Register listings are within a quarter mile.
What it isHistoric building in Mayville, North Dakota, USA. 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↗Make it a walk: 5 landmarks in about 5 minutes
21--25 Main St. W, Mayville · about 0.1 miles on foot, as the crow flies
7 more Register listings within half a mile
★ National Historic Landmark · D district · B building · S site. Each opens its own page.
Memories of Union Block
The record says what it is. Neighbors know what it means.
Your answer becomes a post in Town Square.
Questions about Union Block
Is Union Block on the National Register of Historic Places?
Yes. It was added on Nov 20, 1985 (Register number 85003353).
Is Union Block a National Historic Landmark?
No. It is on the National Register; North Dakota has 4 National Historic Landmarks.
Can you visit Union Block?
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 Union Block?
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 75326730 · Wikidata. Map tiles © OpenStreetMap contributors.