Chicago’s rat and rodent sighting map
RatCity maps every rat and rodent sighting reported across Chicago, so you can see which blocks, neighborhoods, and zip codes actually have a rat problem — not just anecdotes, but the same data the city itself tracks, updated daily.
Most of what you see on the map is pulled directly from the City of Chicago’s public 311 system — specifically, every “Rodent Baiting/Rat Complaint” service request residents have filed with the city. A daily automated job fetches new requests from Chicago’s open data portal and adds them to the map, so it stays current without anyone manually updating it.
The rest comes from visitors like you, reporting a sighting directly on the map. Each report is matched to Chicago’s real neighborhood and zip code boundaries the same way the city’s own 311 data is, so community reports and city data sit on equal footing.
Switch between Day, Week, 30 Days, and Year at the top to see how sightings trend over different time windows. By default, the map shows one circle per Chicago neighborhood — bigger and redder means more reports — so it lines up with the “Rat Rankings” leaderboard in the sidebar. Click a neighborhood, on the map or in the list, to zoom in and see individual reports there.
The neighborhood with the most reported sightings gets crowned Chicago’s reigning Rat King — updated automatically as new reports come in.
Click “Report a sighting” on the map, then tap the location, use your current location, or search an address. Add a quick description and submit — it’s reviewed automatically (protected against spam and bots) and shows up on the public map right away.
See the Privacy Policy for how report data is handled, or reach out at ratcity.support@gmail.com.
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