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

54,128 reports match your filters.

Date	Address	Neighborhood	Ward	Status	Response time	Reported via	Source
8/14/2025	7936 S MERRILL AVE	South Chicago	8	Completed	12 days	Alderman's Office	City 311
8/14/2025	3532 N HOYNE AVE	North Center	32	Completed	11 days	Mobile Device	City 311
8/14/2025	6054 N NAPLES AVE	Norwood Park	45	Completed	7 days	Alderman's Office	City 311
8/14/2025	4232 S MOZART ST	Brighton Park	12	Completed	11 days	Alderman's Office	City 311
8/14/2025	2816 W SUMMERDALE AVE	Lincoln Square	39	Completed	12 days	Phone Call	City 311
8/14/2025	5815 N SHERIDAN RD	Edgewater	48	Completed	4 days	Internet	City 311
8/14/2025	911 W 32ND PL	Bridgeport	11	Completed	4 days	Internet	City 311
8/14/2025	2935 N MILWAUKEE AVE	Avondale	35	Completed	11 days	Alderman's Office	City 311
8/14/2025	7750 S WOLCOTT AVE	Auburn Gresham	17	Completed	8 days	Mobile Device	City 311
8/14/2025	5815 W GRACE ST	Portage Park	38	Completed	8 days	Mobile Device	City 311
8/14/2025	4716 W SHAKESPEARE AVE	Belmont Cragin	26	Completed	11 days	Mobile Device	City 311
8/14/2025	3416 W MELROSE ST	Avondale	35	Completed	11 days	Phone Call	City 311
8/14/2025	3744 W 60TH PL	West Lawn	23	Completed	13 days	Phone Call	City 311
8/14/2025	3654 N SOUTHPORT AVE	Lake View	44	Completed	8 days	Mobile Device	City 311
8/14/2025	2307 W ADDISON ST	North Center	32	Completed	11 days	Internet	City 311
8/14/2025	642 W BELDEN AVE	Lincoln Park	43	Completed	12 days	Mobile Device	City 311
8/14/2025	5319 W SUNNYSIDE AVE	Portage Park	45	Completed	13 days	Phone Call	City 311
8/14/2025	5411 S KARLOV AVE	West Elsdon	23	Completed	11 days	Mobile Device	City 311
8/14/2025	5131 S GREENWOOD AVE	Hyde Park	5	Completed	14 days	Phone Call	City 311
8/14/2025	931 W CORNELIA AVE	Lake View	44	Completed	13 days	Internet	City 311
8/14/2025	549 W DEMING PL	Lincoln Park	43	Completed	12 days	Phone Call	City 311
8/14/2025	1936 N HALSTED ST	Lincoln Park	43	Completed	12 days	Internet	City 311
8/14/2025	553 W DEMING PL	Lincoln Park	43	Completed	12 days	Phone Call	City 311
8/14/2025	120 E BELLEVUE PL	Near North Side	42	Completed	1 day	Phone Call	City 311
8/14/2025	50 E BELLEVUE PL	Near North Side	42	Completed	1 day	Phone Call	City 311

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