According to its NRHP nomination, its Greek Revival styling is rare in North Dakota, and especially in Devils Lake, a "small rurally oriented community". In addition, the "quality of materials and workmanship set a nearly unattainable standard among contemporary buildings and, therefore, the 'Federal Building' became a cultural and artistic landmark to the community, a source of prestige still felt and honored."[2]
The Lake Region Heritage Center in the Old Post Office Building hosts many local and travelling exhibits. Exhibits include local history displays, a post office, recreations of a local doctor's and dentist office, the original federal courtroom, an early law office, a barber shop, and a display of Native American artifacts. The Center also hosts art exhibits in cooperation with the North Dakota Art Gallery Association.