RatCity — Chicago Rat and Rodent Sightings Map

RatCity

4696 locations in the last 30 days (4849 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

54,807 reports match your filters.

DateAddressNeighborhoodWardStatusResponse timeReported viaSource
9/12/2025230 W 23RD PLArmour Square11Completed7 daysMobile DeviceCity 311
11/11/20252877 S ARCHER AVEBridgeport11Completed1 dayAlderman's OfficeCity 311
5/15/20262720 S QUINN STBridgeport11Completed3 daysPhone CallCity 311
8/10/20253310 S CARPENTER STBridgeport11Completed3 daysMobile DeviceCity 311
9/11/20264183 S EMERALD AVENew City11Completed12 daysAlderman's OfficeCity 311
11/2/20253031 S ARCHER AVEBridgeport11Completed2 daysPhone CallCity 311
11/11/20252896 S ARCHER AVEBridgeport11Completed1 dayAlderman's OfficeCity 311
11/11/20252872 S LOOMIS STBridgeport11Completed1 dayAlderman's OfficeCity 311
6/2/2026639 W 26TH STBridgeport11Completed1 dayInternetCity 311
4/14/20262334 S WENTWORTH AVEArmour Square11Completed0 daysInternetCity 311
9/18/20262831 S SHORT STBridgeport11Completed14 daysAlderman's OfficeCity 311
4/14/20262806 S WENTWORTH AVEArmour Square11Completed0 daysMobile DeviceCity 311
4/14/20262952 S BONAPARTE STBridgeport11Completed1 dayMobile DeviceCity 311
4/14/2026318 W 27TH STArmour Square11Completed1 dayInternetCity 311
4/14/2026320 W 27TH STArmour Square11Completed1 dayInternetCity 311
4/2/20262702 S HILLOCK AVEBridgeport11Completed1 dayMobile DeviceCity 311
4/14/2026316 W 27TH STArmour Square11Completed1 dayInternetCity 311
8/25/20263144 S NORMAL AVEBridgeport11Completed14 daysMobile DeviceCity 311
7/20/20262900 S PRINCETON AVEArmour Square11Completed4 daysInternetCity 311
4/14/20262932 S PRINCETON AVEArmour Square11Completed1 dayInternetCity 311
8/8/20253434 S LOWE AVEBridgeport11Completed5 daysInternetCity 311
9/8/20253222 S RACINE AVEBridgeport11Completed10 daysAlderman's OfficeCity 311
7/15/20262700 S PRINCETON AVEArmour Square11Completed9 daysInternetCity 311
7/21/20262640 S PRINCETON AVEArmour Square11Completed3 daysPhone CallCity 311
3/12/20262607 S UNION AVEBridgeport11Completed4 daysPhone CallCity 311
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