RatCity — Chicago Rat and Rodent Sightings Map

RatCity

4156 locations in the last 30 days (4342 reports) · Last sighting 20 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

59,447 reports match your filters.

DateAddressNeighborhoodWardStatusResponse timeReported viaSource
10/31/20261334 W WOLFRAM STLake View32Open—InternetCity 311
9/21/20263946-3958 North Fremont Street, Chicago, ILLake View————Resident report
10/31/20261730 W POTOMAC AVEWest Town1Open—Mobile DeviceCity 311
11/1/20262728 W MELROSE STAvondale35Open—InternetCity 311
11/5/20262719 W POPE JOHN PAUL II DRBrighton Park12Open—Mobile DeviceCity 311
11/1/20263545 E 106TH STEast Side10Open—InternetCity 311
10/31/20266424 S KOSTNER AVEWest Lawn13Open—Mobile DeviceCity 311
11/2/20261716 W GARFIELD BLVDNew City16Open—Alderman's OfficeCity 311
11/1/20261743 W POTOMAC AVEWest Town1Open—Mobile DeviceCity 311
11/1/2026846 W CORNELIA AVELake View44Open—InternetCity 311
10/31/20263857 N OTTAWA AVEDunning38Open—InternetCity 311
11/2/20261140 N MILWAUKEE AVEWest Town1Open—Phone CallCity 311
11/2/20262917 N NASHVILLEBelmont Cragin36Open—Salesforce Mobile AppCity 311
11/1/20263159 N CLYBOURN AVENorth Center32Open—Mobile DeviceCity 311
11/1/20264511 W MONROE STWest Garfield Park28Open—InternetCity 311
11/2/20262329 N LATROBE AVEBelmont Cragin31Open—Mobile DeviceCity 311
11/2/20262309 W 18TH PLLower West Side25Open—InternetCity 311
11/1/202610941 S ST LOUIS AVEMount Greenwood19Open—Mobile DeviceCity 311
11/2/20266016 S MAY STEnglewood16Open—InternetCity 311
11/1/20263539 N KOSTNER AVEIrving Park30Open—Mobile DeviceCity 311
10/31/20261244 W DIVERSEY PKWYLake View32Open—InternetCity 311
10/31/202675 E 102ND STRoseland9Open—Phone CallCity 311
11/2/20263300 N KARLOV AVEIrving Park30Open—Phone CallCity 311
11/1/20261712 W BEACH AVEWest Town1Open—Mobile DeviceCity 311
10/28/2026329 W 25TH PLArmour Square11Open—Phone CallCity 311
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