Orkin’s annual list ranks U.S. cities by the number of new residential mosquito treatments performed from March 18, 2025 to March 18, 2026. Los Angeles held the No. 1 position for the sixth straight year, followed by Chicago and New York, while Milwaukee moved up 15 spots to No. 23 and Minneapolis climbed six spots to No. 13. New entrants on the list include Traverse City, Mich.; Greenville, N.C.; and Springfield, Ill.

Data reveals that mosquito pressure is expanding beyond traditional southeastern hotspots, with Midwestern cities showing rapid year-over-year growth. Historical leader Atlanta fell to fifth, reflecting a broader nationwide trend driven by shifting climate conditions and the spread of the yellow fever mosquito. Cities like Boston and West Palm Beach also saw double-digit jumps, underscoring service demand in emerging regions.

From May through August 2026, Orkin will contribute $25 for each mosquito-control service sold to the American Red Cross, capped at $250,000. This initiative supports the nation’s blood supply during peak season and aligns with Orkin’s public health commitment while boosting customer engagement during high-demand months.

The increase in residential mosquito treatments highlights growing demand for Orkin’s services and potential revenue gains for Rollins. Continued expansion into new markets and targeted promotional campaigns, such as the Red Cross partnership, may enhance brand recognition and drive service penetration in under-served regions.