| US Post Office-St. Johnsville | |
| Location: | 15 E. Main St.,[1] St. Johnsville, New York |
| Coordinates: | 42.9986°N -74.6783°W |
| Built: | 1936 |
| Architect: | Louis A. Simon, Jirayr H. Zorthian |
| Architecture: | Colonial Revival |
| Added: | May 11, 1989 |
| Area: | less than one acre |
| Refnum: | 88002434 |
US Post Office-St. Johnsville is a historic post office building located at St. Johnsville in Montgomery County, New York, United States. It was built in 1936, and is one of a number of post offices in New York State designed by the Office of the Supervising Architect of the Treasury Department under Louis A. Simon. It is a one-story, symmetrical brick building on a stone watertable in the Colonial Revival style. It features a copper clad gable roof with a square, flat topped cupola with a weathervane. The interior features a 1940 mural by Jirayr H. Zorthian (1911-2004) titled "Early St. Johnsville Pioneers."[2]
It was listed on the National Register of Historic Places in 1989.