4348 locations in the last 30 days (4504 reports) · Last sighting yesterday
What am I looking at?
Each circle is a Chicago neighborhood. The number is its report count — click one to zoom in and see individual sightings there.
Colors are relative to what’s currently on screen, so they adjust as you switch time ranges.
Zoomed into a neighborhood or zip? Same colors group nearby reports, and a bright dot means that exact spot’s been reported more than once.
Chicago has topped national rankings of the rattiest U.S. cities for over a decade running — a reputation the city itself takes seriously enough to run one of the country’s most active 311 rodent-complaint programs. Every baiting request, burrow report, and complaint filed with the city becomes a public record. RatCity turns that record, plus reports from people who live here, into a map you can actually use: is this block bad? Is it getting worse? Which neighborhood is winning (or losing) the fight this month?
Most of the data is Chicago’s own — every “Rodent Baiting/Rat Complaint” filed through 311, pulled in automatically once a day so the map never goes stale. Layered on top are sightings reported directly by visitors, matched to the same neighborhood and zip-code boundaries the city uses, so a resident’s report and an official 311 complaint carry equal weight on the map.
Circles are sized and colored by how many reports a neighborhood has racked up — blue is quiet, red means trouble. The Day / Week / 30 Days / Year toggle up top changes the window, so you can see whether a neighborhood’s rat problem is a one-week blip or a year-long trend. Whoever’s in the lead gets crowned the neighborhood Rat King in the sidebar, a title that changes hands as new reports come in.
Noticed a rat that isn’t on the map yet? Use “Report a sighting” above — it takes under a minute and goes live as soon as it’s reviewed. Curious about where the data actually comes from or how reports are moderated? See the About page for the full breakdown.
Want more? The blog has weekly trend recaps and guides on Chicago’s rat problem and how to keep it out of your home.
56,145 reports match your filters.
| Date | Address | Neighborhood | Ward | Status | Response time | Reported via | Source |
|---|---|---|---|---|---|---|---|
| 9/25/2025 | 165 N MAY ST | Near West Side | 27 | Completed | 5 days | Internet | City 311 |
| 9/25/2025 | 5221 W NELSON ST | Belmont Cragin | 31 | Completed | 7 days | Mobile Device | City 311 |
| 9/25/2025 | 2901 S DR MARTIN LUTHER KING JR DR | Douglas | 4 | Completed | 7 days | Phone Call | City 311 |
| 9/25/2025 | 1032 W MONTROSE AVE | Uptown | 46 | Completed | 8 days | Internet | City 311 |
| 9/25/2025 | 3604 W WOLFRAM ST | Avondale | 35 | Completed | 8 days | Phone Call | City 311 |
| 9/25/2025 | 4340 N CAMPBELL AVE | North Center | 47 | Completed | 8 days | Phone Call | City 311 |
| 9/25/2025 | 10502 S LAWNDALE AVE | Mount Greenwood | 19 | Completed | 7 days | Phone Call | City 311 |
| 9/25/2025 | 1614 N HAMLIN AVE | Humboldt Park | 26 | Completed | 8 days | Phone Call | City 311 |
| 9/25/2025 | 4853 W QUINCY ST | Austin | 28 | Completed | 7 days | Phone Call | City 311 |
| 9/25/2025 | 9228 S ABERDEEN ST | Washington Heights | 21 | Completed | 5 days | Phone Call | City 311 |
| 9/25/2025 | 2742 W 16TH ST | North Lawndale | 28 | Completed | 7 days | Internet | City 311 |
| 9/25/2025 | 5408 S KENNETH AVE | West Elsdon | 23 | Completed | 7 days | Phone Call | City 311 |
| 9/25/2025 | 938 W LELAND AVE | Uptown | 46 | Completed | 8 days | Mobile Device | City 311 |
| 9/25/2025 | 3707 N NARRAGANSETT | Dunning | 38 | Completed | 8 days | Salesforce Mobile App | City 311 |
| 9/25/2025 | 132 E 23RD ST | Near South Side | 3 | Completed | 7 days | Internet | City 311 |
| 9/25/2025 | 1222 W DIVERSEY AVE | Lake View | 32 | Completed | 11 days | Internet | City 311 |
| 9/25/2025 | 800 S KEDVALE AVE | West Garfield Park | 24 | Completed | 4 days | Phone Call | City 311 |
| 9/25/2025 | 1470 S LAKE SHORE DR SB | Near South Side | 3 | Completed | 7 days | Internet | City 311 |
| 9/25/2025 | 1732 N CENTRAL PARK AVE | Humboldt Park | 26 | Completed | 8 days | Phone Call | City 311 |
| 9/25/2025 | 2019 N MOZART ST | Logan Square | 1 | Completed | 6 days | Mobile Device | City 311 |
| 9/25/2025 | 2104 N HUDSON AVE | Lincoln Park | 43 | Completed | 11 days | Internet | City 311 |
| 9/25/2025 | 10544 S CHRISTIANA AVE | Mount Greenwood | 19 | Completed | 8 days | Phone Call | City 311 |
| 9/25/2025 | 1308 N RIDGEWAY AVE | Humboldt Park | 36 | Completed | 1 day | Phone Call | City 311 |
| 9/25/2025 | 3811 W 110TH PL | Mount Greenwood | 19 | Completed | 8 days | Phone Call | City 311 |
| 9/25/2025 | 4728 N SACRAMENTO AVE | Albany Park | 33 | Completed | 7 days | Phone Call | City 311 |