John C. Kluczynski Federal Building & U.S. Post Office, Loop Station

Aerial black and white rendered photo of the Chicago Federal Plaza showing the Dirksen Courthouse, Kluczynski Federal Building, and Loop Post Office230 South Dearborn St.
Chicago, IL 60604
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Designed by Chicago architect Ludwig Mies van der Rohe and completed in 1975, the John C. Kluczynski Federal Building and Loop Station Post Office is a 43-story skyscraper paired with a separate one-story post office. Located in the Federal Plaza in Chicago's downtown Loop, the Kluczynski building and plaza is bordered by Clark Street (west), Jackson Boulevard (south), Dearborn Street (east), and Adams Street (north). 

Amenities available to federal employees include a credit union and fitness center. The latest (2015) GSA Tenant Satisfaction Survey resulted in an 81% more than satisfied rating (four or five on a five-point scale) for the facility and GSA services.

The building is named after former U.S. Congressman John Carl Kluczynski (IL), who served from 1951-75..

Property Manager: Antoine Bell

Public Hours: 7 a.m.– 6 p.m. Monday through Friday (except federal holidays)

For building service calls or more information, contact the Kluczynski Service Desk listed in the top right box on this page. For other federal government information, call 1-800-FED-INFO.

Public Services The building's public services include

  • Fitness Center – sub-basement (SM level)
  • Snack Shop & Convenience Store – 2nd floor
  • Passport Agency – 18th floor
  • Internal Revenue Service, Taxpayer Assistance Center – 24th floor
  • Federal Credit Union – 29th floor
  • Senator Dick Durbin's Office – 38th floor
  • Senator Mark Kirk's Office – 39th floor

Art in Architecture & Additional History 

Aerial photo of the Calder Flamingo sculpture on the Chicago Federal PlazaThe main plaza to the north features Flamingo, a red steel creation by world-renowned sculptor Alexander Calder.

View in-depth historical information on the Chicago Federal Plaza, including the Kluczynski and Metcalfe Federal Buildings and Dirksen U.S. Courthouse, among more than 80 properties featured in GSA's Public Buildings Heritage Program. Through an award-winning series of posters and brochures, this program details 150 years of notable construction and offers webpages explaining the architecture and history of select buildings.

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Last Reviewed 2015-09-10