John Archibald Campbell United States Courthouse, Federal courthouse in Mobile, Alabama.

The John Archibald Campbell United States Courthouse is a federal courthouse in Mobile, Alabama, built in an austere blend of Renaissance Revival and Art Deco styles. Its white limestone facade sits on a granite base, with thirteen bays on the east elevation and stylized Ionic pilasters separating the second- and third-floor bays. Granite steps with cheek walls lead to doors set in the central three bays.

The courthouse replaced an 1856 United States Custom House and Post Office and received its National Register of Historic Places designation in October 2008. The original 1935 structure underwent a western expansion in 1940 that matched the existing architecture perfectly under federal architect Louis A. Simon's direction.

The interior spaces feature Art Deco design elements visible in the main lobby, where travertine walls, walnut doors, and terrazzo flooring with marble borders create a formal atmosphere. These details shape how visitors experience the building's character.

Following a substantial renovation completed in 2020, the building now functions as the location for bankruptcy court proceedings. Visitors should know this is an active courthouse, so security measures and access restrictions may apply.

A bronze gate on the north elevation marks the exact point where the 1940 expansion begins; it originally opened onto a central light courtyard. The first floor there has a bronze gate spanning three bays, with windows filling the rest.