Datasets
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COVID-19 Vaccination New Age Groups - 6/9/2021
New age groups in COVID-19 vaccination datasets. -
Changes to CTA Ridership Datasets - 3/20/2026
Changes to CTA Ridership Datasets -
Libraries - 2026 Circulation by Location
Circulation figures include new checkouts, renewals, downloadable media, Talking Book and Braille downloadable materials. Chicago Public Library consists of the Harold... -
Employee Payroll Data (FMPS Payroll Costing)
Note, 7/10/2025: Please see this article for information on a change to the EMPLOYEE DATASET ID column and this article for information on a data correction. Welcome to the... -
Violence Reduction Data Portal Visualizations Replaced by Violence Reduction Dashboard
Announcement of violence reduction data portal visualizations replaced by violence reduction dashboard launched in 2021. -
Financial Incentive Projects - Property Assessed Clean Energy (PACE)
PACE provides loans to residential and commercial development projects specifically for energy-efficiency improvements. The cost of the loan is paid back over time through a... -
CTA - Ridership - Bus Routes - Monthly Day-Type Averages & Totals
This dataset shows monthly averages, by day type (weekday, Saturday or Sunday/Holiday) and monthly totals for all CTA bus routes, back to 2001. See attached readme file for... -
Transportation Network Providers - Vehicles
All vehicles reported by Transportation Network Providers (sometimes called rideshare companies) to the City of Chicago as part of routine reporting required by ordinance.... -
Building Permits Dataset Contact Columns Removed - 7/16/2019
Columns removed from building permits dataset. -
311 Service Requests - Garbage Carts - Historical
As described in https://data.cityofchicago.org/stories/s/311-Dataset-Changes-12-11-2018/d7nq-5g7t, the function of this dataset was replaced by... -
311 Service Requests - Rodent Baiting - Historical
As described in https://data.cityofchicago.org/stories/s/311-Dataset-Changes-12-11-2018/d7nq-5g7t, the function of this dataset was replaced by... -
New 311 Service Requests Dataset - 3/6/2019
Announcement of the first dataset from the new 311 system launched in December 2018. -
How Chicago Protects Privacy in TNP and Taxi Open Data - 4/12/2019
Read about privacy protections in TNP and Taxi trip datasets. -
311 Service Requests - Pot Holes Reported - Historical
As described in https://data.cityofchicago.org/stories/s/311-Dataset-Changes-12-11-2018/d7nq-5g7t, the function of this dataset was replaced by... -
Boundaries - Ward Precincts (2023-2024)
Ward precincts, which function as local election districts to determine the polling places for voters, based on their addresses. Precincts are based on U.S. Census Bureau... -
CTA - Ridership - Daily Boarding Totals
This dataset shows systemwide boardings for both bus and rail services provided by CTA, dating back to 2001. Daytypes are as follows: W = Weekday, A = Saturday, U =... -
CDPH Environmental Hold on City-Issued Permits and LUST NFR
This dataset contains environmental holds placed by the Department of Environment (DOE) up to December 31, 2011 and by the Department of Public Health (CDPH) post December 31,... -
Transportation Network Providers - Trips (2025-)
All trips, starting January 2025, reported by Transportation Network Providers (sometimes called rideshare companies) to the City of Chicago as part of routine reporting... -
CTA - Ridership - 'L' Station Entries - Daily Totals
This list shows daily totals of ridership, by station entry, for each 'L' station dating back to 2001. Dataset shows entries at all turnstiles, combined, for each station.... -
COVID-19 Partial-Chicago ZIP Code Change - 8/12/2021
Announcement of COVID-19 Chicago zip code change.