The main facade, facing South Street, is nine bays wide, with a recessed entry area that is defined by six large fluted Doric columns and flanking square corner pilasters.

Similar square pilasters articulate the bays at the rear of the recess.

The building is topped by entablatures, one adorned with Roman patterns, with a cornice and broad parapet above.

The south facade, facing Union Street, has six window bays, also articulated by pilasters.

[2] The post office was built in 1914, and was one of the last works prepared by the Office of the Supervising Architect of the United States Treasury Department during the tenure of James Knox Taylor.