Animal Population

Mosquitoes by State 2025

# of Species

20
40
60
80
State
# of Species
Most or Least Mosquitos Ranking
Peak Season
Texas Flag
Texas85MostFebruary - November (southern), March - September (northern)
Florida Flag
Florida80MostFebruary - November (southern), March - September (northern)
New York Flag
New York70Late April - September (southern tip), May - September (rest of state)
Louisiana Flag
Louisiana68MostFebruary - November (southern), March - September (northern)
Georgia Flag
Georgia63MostMarch - September
South Carolina Flag
South Carolina61March - September
Alabama Flag
Alabama60MostMarch - September
Kentucky Flag
Kentucky60Early April - September
New Jersey Flag
New Jersey60Late April - September
North Carolina Flag
North Carolina60MostEarly April - September
Oklahoma Flag
Oklahoma60MostEarly April - September (northern), March - September (southern)
Pennsylvania Flag
Pennsylvania60Late April - September
Ohio Flag
Ohio59Early April - September (southern), Late April - September (northern)
Delaware Flag
Delaware57LeastLate April - September
Iowa Flag
Iowa57Late April - September
New Mexico Flag
New Mexico57March - September
Wisconsin Flag
Wisconsin56May - September
Arkansas Flag
Arkansas55March - September (southern), Early April - Semptember (northern)
Indiana Flag
Indiana55Early April - September (southern), Late April - September (northern)
Michigan Flag
Michigan55May - September
Connecticut Flag
Connecticut54Late April - September
Illinois Flag
Illinois52Early April - September (southern), Late April - September (northern)
Massachusetts Flag
Massachusetts51May - September
California Flag
California50LeastMarch - September (southern), Early April - September (northern)
Idaho Flag
Idaho50Late April - September (southern), May - September (northern)
Maryland Flag
Maryland50May - September
Minnesota Flag
Minnesota50May - September
Mississippi Flag
Mississippi50March - September
Missouri Flag
Missouri50Early April - September
Montana Flag
Montana50MostMay - September
Nebraska Flag
Nebraska50Late April - September
Oregon Flag
Oregon50Late April - September (most of state), May - September (northern edge)
Utah Flag
Utah50Early April - September
Virginia Flag
Virginia50MostEarly April - September
Rhode Island Flag
Rhode Island46Late April - September
Colorado Flag
Colorado45Early April - September
Maine Flag
Maine45May - September
Vermont Flag
Vermont45May - September
Wyoming Flag
Wyoming45Late April - September
New Hampshire Flag
New Hampshire43May - September
South Dakota Flag
South Dakota43MostLate April - September (southern), May - September (northern)
Arizona Flag
Arizona40LeastMarch - September
Nevada Flag
Nevada40LeastMarch-September (southern tip), Early April-Semptember (rest of state)
Washington Flag
Washington40May - September
North Dakota Flag
North Dakota38May - September
Alaska Flag
Alaska30May - September (southern region)
West Virginia Flag
West Virginia26LeastEarly April - September (southern), Late April - September (northern tip)
Tennessee Flag
Tennessee9Early April - September
Hawaii Flag
Hawaii8LeastFebruary - November
Kansas Flag
Kansas2Early April - September
United States Flag
United States49.80