RatCity — Chicago Rat and Rodent Sightings Map

RatCity

4618 locations in the last 30 days (4770 reports) · Last sighting 21 hours 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
9/16/20263204 S EMERALD AVEBridgeport11Completed13 daysMobile DeviceCity 311
6/3/20262343 S WENTWORTH AVEArmour Square11Completed1 dayAlderman's OfficeCity 311
6/3/20263029 S PARNELL AVEBridgeport11Completed0 daysMobile DeviceCity 311
9/1/20263647 S UNION AVEBridgeport11Completed14 daysInternetCity 311
8/3/2026258 W 31ST STArmour Square11Completed10 daysPhone CallCity 311
9/17/20262631 S SHIELDS AVEArmour Square11Completed12 daysInternetCity 311
6/4/20261209 W 33RD STBridgeport11Completed1 dayMobile DeviceCity 311
9/18/20262913 S SHIELDS AVEArmour Square11Completed11 daysInternetCity 311
9/27/20262941 S HALSTED STBridgeport11Open—InternetCity 311
9/29/2026522 W 32ND STBridgeport11Open—InternetCity 311
6/3/2026229 W 23RD STArmour Square11Completed1 dayAlderman's OfficeCity 311
6/3/2026305 W 23RD STArmour Square11Completed1 dayAlderman's OfficeCity 311
9/17/2026318 W 27TH STArmour Square11Completed12 daysInternetCity 311
9/29/20262640 S PRINCETON AVEArmour Square11Open—Phone CallCity 311
9/29/2026315 W 29TH STArmour Square11Open—Alderman's OfficeCity 311
9/13/2026515 W 36TH STBridgeport11Completed15 daysInternetCity 311
9/14/20261008 W 31ST STBridgeport11Completed14 daysMobile DeviceCity 311
8/18/20263140 S PARNELL AVEBridgeport11Completed10 daysAlderman's OfficeCity 311
6/3/20263429 S HALSTED STBridgeport11Completed1 dayAlderman's OfficeCity 311
8/18/20263144 S PARNELL AVEBridgeport11Completed10 daysAlderman's OfficeCity 311
6/3/20263515 S HALSTED STBridgeport11Completed1 dayAlderman's OfficeCity 311
6/3/20262354 S WENTWORTH AVEArmour Square11Completed2 daysAlderman's OfficeCity 311
6/3/20263335 S HALSTED STBridgeport11Completed1 dayAlderman's OfficeCity 311
6/3/20263009 S HALSTED STBridgeport11Completed1 dayAlderman's OfficeCity 311
6/3/20262213 S WENTWORTH AVEArmour Square11Completed2 daysAlderman's OfficeCity 311
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