Illinois Open Data

data.illinois.gov ↗

Illinois public-data catalogue and guides

Visit site ↗ Save

SI Score: 40/100
Pricing: Not confirmed
Free plan: Not confirmed
Sign-up required: Not confirmed

Open Data illinois

Ask SI about Illinois Open Data

Answers use saved listing facts and recorded sources.

What it does

Illinois Open Data provides a browse route, API guides and training materials.

The portal links browsing, API guides and training. An indexed Department of Revenue record describes PTAX-203, 203-A and 203-B filings since January 2024, states weekly updates and labels the resource Public Domain. Treat those as that record’s scope and terms; other catalogue entries need their own checks.

Best for

Finding Illinois public-data records and their source metadata

Sources

Illinois Open Data (Oct 26, 2026)
Catalog | Illinois Open Data (Oct 26, 2026)
PTAX 203, A, AND B Records Since January 2024 | Illinois Open Data (Oct 26, 2026)

SI Score

40/100

#32 in Open Data

Based on published information. No hands-on task test.

Method 2.0 · Saved catalogue only Assessed Oct 26, 2026Score ceiling for this evidence: 59/100.

Product usefulness 40

Evidence

An official indexed property-transfer record adds a concrete publisher, period and licence to the portal’s named task, supporting basic discovery40. Its direct page read exposed only a shell, so export controls remain unestablished.

Limits: AI review of saved source passages. No hands-on test, human approval or automatic-provider checker receipt.

Source links and check dates are in Sources and checks below.

Separate website checks

These checks do not add points to the SI Score. They inspect the website's HTML, not the product in use.

Basic website checksunknown

No check recorded.

HTML accessibility checksunknown

No check recorded.

Homepage HTML responseunknown

No check recorded.

Trackers in homepage HTMLunknown

No check recorded.

Page date hintsunknown

No check recorded.

Policy links do not verify a company's conduct. An HTML response time is not application speed. Tracker and accessibility checks miss behavior after page load. Copyright dates do not prove product upkeep.

How the SI Score works →

Unconfirmed details may be unassessed, absent from the pages checked or temporarily unreadable. A missing price does not mean the service is free.

Sources and checks

Supporting pages for product usefulness, site facts, prices and separate website checks. Each record keeps its own date. Reading a page does not establish how well the product performs in use.

data.illinois.gov/
- Product usefulness evidenceChecked Oct 26, 2026
data.illinois.gov/Government-and-Public-Employees/PTAX-203-A-AND-B-Records-Since-January-2024/kpdj-zmhb
- Product usefulness evidenceChecked Oct 26, 2026

Browse this categoryMore Open Data tools

Something wrong or out of date? Send a correction and an editor will check it against the site. Owners can verify their site first so their corrections are marked as coming from the owner. Owners cannot change the score.

Suggest a correction Claim this listing