Cook County Preliminary Bid Tabulations Archive

An archive of preliminary bid tabulations for contracts estimated at $25,000 or more from Cook County, Illinois. The data covers the period before June 2016 and was published by the Cook County government data catalog to improve process transparency. Information is subject to change pending final review.

Use Cases

• Analyze temporal patterns in bid submissions using the Bid Opening Date column.
• Link contract details by joining on the Contract Number field.
• Review project descriptions via the Description column for procurement category analysis.
• Access supporting documentation for bids using the provided Link column.

Strengths

• Includes bids for contracts valued at $25,000 or more, providing a financial threshold.
• Data covers a defined historical period before June 2016.

Limitations

• Data is explicitly labeled as preliminary and subject to change, introducing potential inaccuracies.
• The dataset is an archive, with current data available elsewhere, indicating it is not maintained.

Provenance

Source

datacatalog.cookcountyil.gov

Collection Method

Publicly opened and read bids for contracts over $25,000; RFP/RFQ/RFI responses not publicly opened.

Time Range

Before June 2016

Freshness

Archive data last updated in January 2026, but covers events only before June 2016.

Geography

Cook County, Illinois, USA