Observations

Q4 2025: 93,178.7

Updated: Apr 9, 2026 8:15 AM CDT

Units:

Millions of Chained 2017 Dollars,

Seasonally Adjusted Annual Rate

Frequency:

Quarterly

Notes

Title	Release Dates

Real Gross Domestic Product by Industry: Private Industries: Professional and Business Services: Professional, Scientific, and Technical Services for Illinois	2016-07-27	2021-06-21
Real Gross Domestic Product: Professional, Scientific, and Technical Services (NAICS 54) in Illinois	2021-06-22	2023-12-04
Real Gross Domestic Product: Professional, Scientific, and Technical Services (54) in Illinois	2023-12-05	2026-04-09

Source

U.S. Bureau of Economic Analysis	2016-07-27	2026-04-09

Release

Gross Domestic Product (GDP) by State	2016-07-27	2021-02-15
Gross Domestic Product by State	2021-02-16	2026-04-09

Units

Millions of Chained 2009 Dollars	2016-07-27	2018-11-13
Millions of Chained 2012 Dollars	2018-11-14	2023-12-04
Millions of Chained 2017 Dollars	2023-12-05	2026-04-09

Frequency

Quarterly	2016-07-27	2026-04-09

Seasonal Adjustment

Seasonally Adjusted Annual Rate	2016-07-27	2026-04-09

Notes

For more information about this release go to http://www.bea.gov/newsreleases/regional/gdp_state/qgsp_newsrelease.htm.	2016-07-27	2021-06-21
Information about this release can be found here (https://www.bea.gov/data/gdp/gdp-state). For information about BEA industries and other regional definitions, visit their Regional Economic Accounts: Regional Definitions website (https://apps.bea.gov/regional/definitions/).	2021-06-22	2026-04-09

Real Gross Domestic Product: Professional, Scientific, and Technical Services (54) in Illinois (ILPROBUSRQGSP)