4508 locations in the last 30 days (4676 reports) · Last sighting 21 hours ago
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.
52,821 reports match your filters.
| Date | Address | Neighborhood | Ward | Status | Response time | Reported via | Source |
|---|---|---|---|---|---|---|---|
| 7/28/2025 | 9557 S WENTWORTH AVE | Roseland | 9 | Completed | 8 days | Phone Call | City 311 |
| 7/28/2025 | 2839 N ROCKWELL ST | Avondale | 35 | Completed | 8 days | Alderman's Office | City 311 |
| 7/28/2025 | 2839 N ELSTON AVE | Avondale | 35 | Completed | 8 days | Alderman's Office | City 311 |
| 7/28/2025 | 3738 N BERNARD ST | Irving Park | 35 | Completed | 8 days | Phone Call | City 311 |
| 7/28/2025 | 3308 N SEELEY AVE | North Center | 32 | Completed | 9 days | Internet | City 311 |
| 7/28/2025 | 1132 N AVERS AVE | Humboldt Park | 37 | Completed | 8 days | Phone Call | City 311 |
| 7/28/2025 | 206 S ALBANY AVE | East Garfield Park | 28 | Completed | 8 days | Alderman's Office | City 311 |
| 7/28/2025 | 6318 W FLETCHER ST | Belmont Cragin | 30 | Completed | 9 days | Alderman's Office | City 311 |
| 7/28/2025 | 3439 N MARSHFIELD AVE | Lake View | 47 | Completed | 9 days | Internet | City 311 |
| 7/28/2025 | 3143 N SEMINARY AVE | Lake View | 44 | Completed | 8 days | Alderman's Office | City 311 |
| 7/28/2025 | 11002 S HOMAN AVE | Mount Greenwood | 19 | Completed | 7 days | Internet | City 311 |
| 7/28/2025 | 10521 S WALLACE ST | Roseland | 21 | Completed | 8 days | Phone Call | City 311 |
| 7/28/2025 | 1942 N KILBOURN AVE | Hermosa | 26 | Completed | 10 days | Mobile Device | City 311 |
| 7/28/2025 | 5740 N WEST WEST CIRCLE AVE | Norwood Park | 41 | Completed | 7 days | Phone Call | City 311 |
| 7/28/2025 | 3120 N SEMINARY AVE | Lake View | 44 | Completed | 8 days | Phone Call | City 311 |
| 7/28/2025 | 864 W NEWPORT AVE | Lake View | 44 | Completed | 8 days | Internet | City 311 |
| 7/28/2025 | 4146 N KOSTNER AVE | Irving Park | 45 | Completed | 7 days | Alderman's Office | City 311 |
| 7/28/2025 | 12605 S YALE AVE | West Pullman | 9 | Completed | 8 days | Mobile Device | City 311 |
| 7/28/2025 | 6549 N MINNEHAHA AVE | Forest Glen | 45 | Completed | 7 days | Internet | City 311 |
| 7/28/2025 | 3740 N HALSTED ST | Lake View | 46 | Completed | 7 days | Internet | City 311 |
| 7/28/2025 | 4121 N MAPLEWOOD AVE | North Center | 47 | Completed | 10 days | Phone Call | City 311 |
| 7/28/2025 | 4945 N SAYRE AVE | Norwood Park | 41 | Completed | 7 days | Mobile Device | City 311 |
| 7/28/2025 | 1631 N MOZART ST | West Town | 26 | Completed | 9 days | Mobile Device | City 311 |
| 7/28/2025 | 2840 S KARLOV AVE | South Lawndale | 22 | Completed | 4 days | Internet | City 311 |
| 7/28/2025 | 3649 N AVERS AVE | Irving Park | 30 | Completed | 10 days | Phone Call | City 311 |