RatCity — Chicago Rat and Rodent Sightings Map

RatCity

4374 locations in the last 30 days (4568 reports) · Last sighting 14 hours ago

📰 Blog
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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.

32080fewer → more

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.

📰 This week’s rat recap

Weekly Rat Trends — Oct 26–Nov 1, 2026

  • 🐀 1,021 new reports — down 9% from the week before
  • 👑 Lake View is Rat King with 70 reports
  • 📈 Biggest jump: Lincoln Park, up 15 from last week
  • 🏙️ The city took 11.2 days on average to resolve a complaint
Read the full recap →

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

59,088 reports match your filters.

DateAddressNeighborhoodWardStatusResponse timeReported viaSource
10/23/20263048 N KOSTNER AVEHermosa31Completed10 daysMobile DeviceCity 311
9/1/20253019 N KOLMAR AVEHermosa31Completed10 daysMobile DeviceCity 311
8/11/20252906 N KOSTNER AVEHermosa31Completed10 daysInternetCity 311
10/27/20251912 N LOWELL AVEHermosa26Completed2 daysInternetCity 311
7/24/20262929 N KENNETH AVEHermosa31Completed10 daysInternetCity 311
8/17/20262131 N KILDARE AVEHermosa35Completed15 daysMobile DeviceCity 311
9/10/20264118 W PALMER STHermosa35Completed12 daysInternetCity 311
8/24/20262211 N KEYSTONE AVEHermosa35Completed11 daysPhone CallCity 311
5/14/20264236 W NELSON STHermosa31Completed6 daysPhone CallCity 311
11/2/20262505 N KILDARE AVEHermosa31Completed1 dayPhone CallCity 311
8/13/20252815 N KILDARE AVEHermosa31Completed1 dayAlderman's OfficeCity 311
9/23/20252100 N PULASKI RDHermosa35Completed3 daysMobile DeviceCity 311
5/20/20264521 W MONTANA STHermosa31Completed2 daysInternetCity 311
8/18/20262111 N KOSTNER AVEHermosa35Completed14 daysMobile DeviceCity 311
8/3/20262106 N TRIPP AVEHermosa35Completed18 daysInternetCity 311
8/13/20264336 W PARKER AVEHermosa31Completed13 daysAlderman's OfficeCity 311
8/13/20264509 W ALTGELD STHermosa31Completed11 daysPhone CallCity 311
9/16/20252339 N KARLOV AVEHermosa35Completed9 daysMobile DeviceCity 311
6/18/20264338 W BARRY AVEHermosa31Completed4 daysAlderman's OfficeCity 311
9/17/20262131 N TRIPP AVEHermosa35Completed11 daysAlderman's OfficeCity 311
7/30/20252820 N KILDARE AVEHermosa31Completed13 daysMobile DeviceCity 311
7/18/20261827 N KEELER AVEHermosa26Completed10 daysInternetCity 311
11/2/20264238 W FULLERTON AVEHermosa31Open—InternetCity 311
11/5/20252221 N LOWELL AVEHermosa35Completed1 dayPhone CallCity 311
9/24/20263001 N LOWELL AVEHermosa31Completed14 daysInternetCity 311
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