The James R. Thompson Center, originally the State of Illinois Center, is a postmodern-style civic building designed by architect Helmut Jahn, located at 100 W. Randolph Street in the Loop district of Chicago. It houses offices of the Illinois state government and serves as a secondary capitol for the State of Illinois in the most populated city and county of the state. Google purchased the building in 2022 and expects to move in 2026 after two years and $280 million of renovations.

Visitors to the Thompson Center's interior can see all 17 floors layered partway around the building's immense skylit atrium. The open-plan offices on each floor are supposed to carry the message of "an open government in action."

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