The Pawnee City United States Post Office is a one-story, brick Colonial Revival-style building constructed in 1940-41. While the building retains a high degree of integrity, its historical significance derives from the mural painted on an interior wall. "The Auction"
The National Register Historic District in Pawnee City is the economic and geographic center of the community. Fifty-two properties are included in the district and consist of forty- seven commercial building, four houses, and the Pawnee City Courthouse.