Aon Center

4th tallest finished building in Chicago

Aon Center is an office building in Chicago, with 83 floors, finished in 1973. It stands 346 m (1,136 ft) tall, which makes it the 4th tallest finished building in Chicago.

Height

346 m · 1,136 ft

Rank in Chicago

4th of 25 listed

Floors

83

Completed

1973

Use

Office

City

Chicago, USA

Next to it in the ranking

• 2nd · Trump International Hotel and Tower423 m · 1,388 ft · 2009
• 3rd · St. Regis Chicago363 m · 1,198 ft · 2020
• 5th · 875 North Michigan Avenue344 m · 1,127 ft · 1969
• 6th · Franklin Center307 m · 1,007 ft · 1989

See all of Chicago's tallest buildings

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Heights, floors and years for finished buildings follow published figures, cross-checked with Wikipedia's list of tallest buildings in Chicago. Last checked 2 Nov 2026.