Name: Chicago Rat and Rodent Sightings
Creator: RatCity

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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.

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

53,243 reports match your filters.

Date	Address	Neighborhood	Ward	Status	Response time	Reported via	Source
5/1/2026	1119 N SPRINGFIELD AVE	Humboldt Park	37	Completed	4 days	Phone Call	City 311
8/27/2026	1119 S CENTRAL PARK AVE	North Lawndale	24	Completed	14 days	Phone Call	City 311
8/11/2025	1119 S CENTRAL PARK AVE	North Lawndale	24	Completed	7 days	Phone Call	City 311
4/28/2026	1119 S CENTRAL PARK AVE	North Lawndale	24	Completed	1 day	Phone Call	City 311
8/11/2026	1119 W 17TH ST	Lower West Side	25	Completed	0 days	Phone Call	City 311
7/30/2026	1119 W 17TH ST	Lower West Side	25	Completed	11 days	Phone Call	City 311
9/10/2026	1119 W 17TH ST	Lower West Side	25	Completed	12 days	Phone Call	City 311
3/25/2026	1119 W ADDISON ST	Lake View	44	Completed	1 day	Internet	City 311
8/16/2026	1119 W BELDEN AVE	Lincoln Park	43	Completed	11 days	Mobile Device	City 311
8/21/2025	1119 W CULLERTON ST	Lower West Side	25	Completed	7 days	Mobile Device	City 311
10/21/2025	1119 W MONTANA ST	Lincoln Park	43	Completed	7 days	Phone Call	City 311
3/28/2026	1119 W RANDOLPH ST	Near West Side	27	Completed	3 days	Mobile Device	City 311
9/29/2025	1119 W WEBSTER AVE	Lincoln Park	43	Completed	7 days	Internet	City 311
9/21/2025	111 E BALBO DR	Loop	4	Completed	10 days	Internet	City 311
10/27/2025	111 E BALBO DR	Loop	4	Completed	4 days	Internet	City 311
11/4/2025	111 E JACKSON DR	Loop	42	Completed	2 days	Internet	City 311
7/26/2026	111 S HALSTED ST	Near West Side	34	Completed	1 day	Internet	City 311
8/6/2026	111 S HALSTED ST	Near West Side	34	Completed	0 days	Internet	City 311
9/15/2025	111 S WACKER DR	Loop	42	Completed	1 day	Alderman's Office	City 311
10/7/2025	111 S WACKER DR	Loop	42	Completed	3 days	Alderman's Office	City 311
3/27/2026	111 W ADAMS ST	Loop	34	Completed	4 days	Internet	City 311
8/14/2025	11200 S AVENUE O	East Side	10	Completed	5 days	Phone Call	City 311
8/13/2025	11200 S CHAMPLAIN AVE	Pullman	9	Completed	9 days	Alderman's Office	City 311
5/25/2026	11200 S PRINCETON AVE	Roseland	21	Completed	4 days	Phone Call	City 311
5/17/2026	11201 S DRAKE AVE	Mount Greenwood	19	Completed	2 days	Internet	City 311