RatCity — Chicago Rat and Rodent Sightings Map

RatCity

4528 locations in the last 30 days (4676 reports) · Last sighting 2 days ago

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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

54,551 reports match your filters.

DateAddressNeighborhoodWardStatusResponse timeReported viaSource
5/14/20263400 N BOSWORTH AVELake View47Completed4 daysAlderman's OfficeCity 311
10/10/2025833 W DAKIN STLake View46Completed10 daysInternetCity 311
10/8/20253406 N LINCOLN AVELake View47Completed7 daysInternetCity 311
1/15/20261757 W BELLE PLAINE AVELake View47Completed1 dayMobile DeviceCity 311
5/28/20263835 N MARSHFIELD AVELake View47Completed5 daysInternetCity 311
5/11/20263924 N JANSSEN AVELake View46Completed1 dayPhone CallCity 311
2/6/20263746 N ASHLAND AVELake View47Completed3 daysInternetCity 311
5/14/20261550 W CORNELIA AVELake View47Completed4 daysMobile DeviceCity 311
5/18/20263910 N FREMONT STLake View46Completed2 daysInternetCity 311
5/15/2026715 W ALDINE AVELake View44Completed4 daysInternetCity 311
2/16/2026841 W IRVING PARK RDLake View46Completed1 dayMobile DeviceCity 311
6/11/20263021 N SOUTHPORT AVELake View32Completed4 daysMobile DeviceCity 311
10/20/20253812 N CLARK STLake View44Completed3 daysPhone CallCity 311
2/20/2026616 W PATTERSON AVELake View46Completed3 daysPhone CallCity 311
6/1/20263519 N WILTON AVELake View44Completed3 daysMobile DeviceCity 311
7/21/20261246 W DIVERSEY AVELake View32Completed14 daysInternetCity 311
2/18/2026847 W BRADLEY PLLake View46Completed1 dayPhone CallCity 311
10/10/2025824 W DAKIN STLake View46Completed10 daysInternetCity 311
2/17/20263959 N GREENVIEW AVELake View46Completed2 daysInternetCity 311
10/18/20251622 W DIVERSEY AVELake View32Completed4 daysInternetCity 311
7/16/20263115 N CLIFTON AVELake View44Completed11 daysInternetCity 311
5/17/20261236 W OAKDALE AVELake View32Completed3 daysMobile DeviceCity 311
9/12/20251416 W DIVERSEY AVELake View32Completed3 daysPhone CallCity 311
9/2/20261115 W OAKDALE AVELake View44Completed14 daysMobile DeviceCity 311
7/30/20261117 W PATTERSON AVELake View44Completed8 daysMobile DeviceCity 311
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