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Los Angeles once again ranks as the number-one mosquito city in the United States, according to Orkin’s 2025 Top 50 Mosquito Cities List, marking its fourth consecutive year at the top. The ranking is based on the number of new residential mosquito treatments performed by Orkin between April 2024 and March 2025. The announcement comes as California enters another warm, wet summer season—ideal conditions for mosquito breeding and activity.
Orkin entomologist Frank Meek explains that last year’s heavy rains have left behind ample standing water, leading to a sharp increase in mosquito populations this year. “Mosquitoes. . .
