Union Block (Brigham City, Utah)

The Union Block, a building at 57 S. Main St. in Brigham City, Utah, was built in 1892. It was listed on the National Register of Historic Places in 1991.

It is a two-part commercial block building. It has also been known as the C.W. Knudson Building.

It was expanded to the rear in 1929 by 65 ft to accommodate a J.C. Penney store as a tenant, in work done by builder Royes J. Petersen.