Los Angeles Holds Top Spot as Worst City for Mosquitoes as Activity Climbs Nationwide

A decade ago, Atlanta led the nation in mosquito activity—in its 6 th year running, Los Angeles has firmly taken that title ATLANTA, May 5, 2026 /PRNewswire/ -- As mosquito season kicks off across the U.S., Orkin's 2026 Mosquito Cities List reveals a significant shift in mosquito activity across the U.S. and where these unwelcome pests are making the biggest buzz. While Los Angeles, Chicago and New York hold the top three spots, the broader top 50 list shows mosquito activity expanding beyond traditional hotspots and reaching more regions across the country.