Whether providing open data from our County systems or maps and information, Cook County is committed to providing transparency and open government.
What is the 2020 Census?
- The U.S. Census counts every resident in the United States.
- A census is mandated...
Home Rule Tax Web (mobile) application
The Home Rule Tax Reward program rewards those individuals who report violations of the Cook...Read more
Justice Advisory Council Board Members 2019
Cook Central: Centralizing Maps, Apps, and Data
From property and boundary data, to transportation, social service, and environmental...Read more
In May 2019, Cook County and the Metropolitan Water Reclamation District of Greater Chicago ("MWRD") entered...Read more
Tell us what you think of the Policy Roadmap Public Dashboard and our new Open Performance Site! We would love to hear what you think. Please send...Read more