RatCity — Chicago Rat and Rodent Sightings Map

RatCity

4477 locations in the last 30 days (4642 reports) · Last sighting yesterday

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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.

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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.

Why Chicago keeps score on its rats

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?

What’s actually on the map

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.

Reading 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.

Browse every sighting

52,998 reports match your filters.

DateAddressNeighborhoodWardStatusResponse timeReported viaSource
8/25/20258800 S DORCHESTER AVECalumet Heights8Completed8 daysPhone CallCity 311
9/16/20268800 S CORNELL AVECalumet Heights8Open—Phone CallCity 311
3/24/20268800 S CARPENTER STAuburn Gresham21Completed1 dayPhone CallCity 311
8/7/2026879 N MARSHFIELD AVEWest Town1Completed12 daysMobile DeviceCity 311
9/10/2026879 N HERMITAGE AVEWest Town1Completed13 daysMobile DeviceCity 311
8/23/2026879 N HERMITAGE AVEWest Town1Completed11 daysInternetCity 311
9/23/20268791 S SOUTH CHICAGO AVECalumet Heights7Completed1 dayInternetCity 311
4/22/2026878 N RICHMOND STWest Town26Completed2 daysInternetCity 311
7/19/2026877 N MOZART STWest Town36Completed10 daysInternetCity 311
1/27/20268775 S BEVERLY AVEAuburn Gresham19Completed1 dayPhone CallCity 311
7/5/2026876 N SACRAMENTO AVEHumboldt Park36Completed8 daysInternetCity 311
11/28/2025876 N SACRAMENTO AVEHumboldt Park36Completed3 daysInternetCity 311
7/21/2026876 N MARSHFIELD AVEWest Town1Completed3 daysInternetCity 311
8/22/2026875 N HERMITAGE AVEWest Town1Completed12 daysMobile DeviceCity 311
8/30/2026875 N DEARBORN STNear North Side42Completed12 daysInternetCity 311
6/22/20268758 S MICHIGAN AVEChatham6Completed1 dayInternetCity 311
2/10/20268758 S MICHIGAN AVEChatham6Completed1 dayInternetCity 311
10/4/20258756 S EXCHANGE AVESouth Chicago10Completed3 daysMobile DeviceCity 311
9/17/20258755 S KINGSTON AVESouth Chicago7Completed12 daysMobile DeviceCity 311
8/28/2026874 N HERMITAGE AVEWest Town1Completed13 daysMobile DeviceCity 311
2/28/2026874 N HERMITAGE AVEWest Town1Completed3 daysInternetCity 311
9/21/20268749 S WABASH AVEChatham6Open—Phone CallCity 311
6/23/20268747 S BURLEY AVESouth Chicago10Completed3 daysMobile DeviceCity 311
6/15/20268746 S BUFFALO AVESouth Chicago10Completed2 daysInternetCity 311
8/28/20258741 S COTTAGE GROVE AVEChatham8Completed12 daysAlderman's OfficeCity 311
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