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. Named after former U.S. Congressman John Carl Kluczynski, who served from 1951-75, the building is located in the Chicago Federal Plaza, which is bordered by Clark Street (west), Jackson Boulevard (south), Dearborn Street (east), and Adams Street (north) in the city's downtown "Loop" district. 

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 at top right. For other federal government information, call 1-800-FED-INFO.

Key Tenants

The building houses the Dept. of Labor, Dept. of State (Passports), Drug Enforcement Administration, General Services Administration, Internal Revenue Service, Office of Personnel Management, and two U.S. Senators.  In the latest (2015) Tenant Satisfaction Survey, 81% rated the facility and GSA services a four or five on a five-point scale.

Public Services 

  • Fitness Center – sub-basement (SM level)
  • Snack Shop & Convenience Store – 2nd floor
  • Passport Agency – 18th floor
  • IRS 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.

The shortcut for this page is www.gsa.gov/jckfb.

Last Reviewed 2016-03-11