Old Chicago Main Post Office
Old Chicago Main Post Office, Art Deco post office in Chicago, Illinois
The limestone building spans 2.5 million square feet across nine floors, featuring white marble interiors and gold glass mosaic decorations throughout its halls.
Graham, Anderson, Probst and White designed this postal facility in 1921, with a major expansion completed in 1934 to meet Chicago's growing mail demands.
The facility processed 19 million pieces of mail daily during its peak operations, serving as a central hub for Montgomery Ward and Sears mail-order businesses.
In 2019, the restored building opened as an office complex, housing corporate tenants including Uber, Walgreens, and PepsiCo after a $500 million renovation.
The structure contains a three-block-long tunnel system beneath Van Buren Street, which allowed mail trucks to drive directly into the building for deliveries.
Location: Illinois
Architects: Graham, Anderson, Probst & White
Official opening: 1921
Architectural style: Neoclassical architecture, Art Deco architecture
Floors above the ground: 9
GPS coordinates: 41.87560,-87.63880
Latest update: May 27, 2025 08:52
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