{{Short description|Office skyscraper in Chicago, Illinois}} {{Use American English|date=April 2025}} {{Use mdy dates|date=April 2025}} {{More citations needed|date=December 2009}} {{Infobox building |name = One South Dearborn |image = 2006-03-30_1760x2640_chicago_1_south_dearborn.jpg |image_size = 200px |caption = One South Dearborn (left) is located directly north of the Inland Steel Building (right) |location = 1 S. Dearborn St.<br/>Chicago, Illinois<br/>United States |coordinates = {{coord|41|52|54|N|87|37|43|W|region:US-IL|display=inline,title}} |status = |construction_start_date = 2003 |completion_date = 2005 |building_type = Office |antenna_spire = |roof = {{convert|571|ft|m|abbr=on}} |top_floor = {{convert|502|ft|abbr=on}} |floor_count = 39 |elevator_count = 19 |cost = |floor_area = {{convert|249326|m2|abbr=on}} |architect = DeStefano Keating Partners |structural_engineer = Halvorson and Partners |current_tenants = Sidley Austin LLP |engineer = |main_contractor = Turner Construction Company |developer = Hines |owner = |operator = |references = }}
'''One South Dearborn''' is a 571 ft (174m) tall skyscraper in Chicago, Illinois. An earlier proposal for the same site proposed a much taller 112-story building. The current anchor tenant is Sidley Austin LLP, which moved into One South Dearborn in November 2005 from Bank One Plaza.<ref>{{Cite web | title = Our Firm | publisher = Sidley Austin | url = http://www.sidley.com/chicago/ | accessdate = 18 December 2009}}</ref>
==See also== *List of tallest buildings in Chicago
==References== {{More footnotes needed|date=December 2009}} {{reflist}} *{{usurped|1=[https://web.archive.org/web/20070102112106/http://www.emporis.com/en/wm/bu/?id=1southdearborn-chicago-il-usa Emporis]}} *[http://skyscraperpage.com/cities/?buildingID=35954 Skyscraperpage]
==External links== *{{official website|http://www.onesouthdearborn.com}}
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Category:Skyscraper office buildings in Chicago Category:Office buildings completed in 2005 Category:Leadership in Energy and Environmental Design basic silver certified buildings Category:2005 establishments in Illinois Category:Central Chicago