Chicago 311 service requests
IL· Population 2,665,039 (2020)
Current release
Data through March 2026
Data from January 2021 through March 2026 · 9.4M records
Monthly average
151.2K
requests per month
Total requests
9.4M
January 2021–March 2026
Latest month
176.2K
requests in March 2026
Monthly request volume
Total 311 requests filed per month. Months with no reported data are shaded red.
Category mix over time
Monthly volume grouped by service category.
Temporal patterns
- Daily average
- 5.0K per day
- March 2026
- 176.2K requests
- Peak filing time
- Tuesday, 2pm
- Weekend share
- 20.7% of filings
- After-hours share
- 43.8% of filings
- Most common type
- 311 INFORMATION ONLY CALL
Requests by category
Select a category for its monthly trend.
| Category | Requests | Share |
|---|---|---|
| Other | 4.9M | 52.4% |
| Noise | 1.7M | 18.2% |
| Trees & Parks | 531.4K | 5.7% |
| Graffiti | 469.4K | 5.0% |
| Trash & Recycling | 346.1K | 3.7% |
| Street Lights & Signals | 337.1K | 3.6% |
| Potholes & Roads | 303.0K | 3.2% |
| Animals & Pests | 253.4K | 2.7% |
| Abandoned Vehicles | 240.1K | 2.6% |
| Building & Housing Maintenance | 112.0K | 1.2% |
| Water, Sewer & Drainage | 98.5K | 1.1% |
| Illegal Dumping | 65.0K | 0.7% |
Source & provenance
Counts on this page are derived from Chicago’s open 311 data feed. Coverage: January 2021 through March 2026.
How to access the raw data: Published as a single Socrata dataset, "311 Service Requests" (dataset id: v6vf-nfxy). Consolidated from 2019 onward. Legacy type-specific datasets (graffiti, rodent baiting, street lights) exist but are frozen at the time of the consolidation.
Source dataset: data.cityofchicago.org