Denver cracks the top ten for the first time in annual ‘rattiest cities’ list

I’ve lived in Colorado my entire life and I’ve never seen a wild rat, but it sounds like that is getting more and more likely….

Orkin’s annual list of the Top 50 Rattiest Cities has just come out, and Denver is in the top ten for the first time.

The pest control company reports that for the first time in 10 years, we have a new rattiest city. Chicago’s decade-long rodent reign has come to an end, as Los Angeles has dethroned the Windy City.

Orkin determines their list based on the number of new rodent treatments they’ve handled at residences between September 2024 and September 2025.

The top 10 rattiest cities in the U.S. are as follows:

(Click here for the entire top 50)

1. Los Angeles, California
2. Chicago, Illinois
3. New York, New York
4. San Francisco, California
5. Hartford, Connecticut
6. Washington, D.C.
7. Detroit, Michigan
8. Philadelphia, Pennsylvania
9. Minneapolis, Minnesota
10. Denver, Colorado