The post office was built in 1931 as part of the decade's federal construction programs; it is one of the few remaining buildings in San Bernardino which predates 1950.

Architect Louis A. Simon designed the building, which incorporates a number of architectural styles.

The general plan of the building is Beaux-Arts; however, the decorative details are inspired by the Mediterranean Revival and Italianate styles.

The front of the building features an arcade with acanthus leaf capitals on the supporting columns and a second-floor porch.

This article about a property in San Bernardino County, California on the National Register of Historic Places is a stub.