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Texas
85
Florida
80
New York
70
Louisiana
68
Georgia
63
South Carolina
61
Alabama
60
Kentucky
60
New Jersey
60
North Carolina
60
Oklahoma
60
Pennsylvania
60
Ohio
59
Delaware
57
Iowa
57
New Mexico
57
Wisconsin
56
Arkansas
55
Indiana
55
Michigan
55
Connecticut
54
Illinois
52
Massachusetts
51
California
50
Idaho
50
Maryland
50
Minnesota
50
Mississippi
50
Missouri
50
Montana
50
Nebraska
50
Oregon
50
Utah
50
Virginia
50
Rhode Island
46
Colorado
45
Maine
45
Vermont
45
Wyoming
45
New Hampshire
43
South Dakota
43
Arizona
40
Nevada
40
Washington
40
North Dakota
38
Alaska
30
West Virginia
26
Tennessee
9
Hawaii
8
Kansas
2

Mosquitoes by State / States with the Most Mosquitoes 2024

Mosquitoes by State / States with the Most Mosquitoes 2024

Mosquitoes by State / States with the Most Mosquitoes 2024

50 states

State
# of Species
Most or Least Mosquitos Ranking
Peak Season
Cases of West Nile Virus Reported 2024
Cases of West Nile Virus Reported 2023
Texas85Most29February - November (southern), March - September (northern)148
Florida80Most2February - November (southern), March - September (northern)14
New York702Late April - September (southern tip), May - September (rest of state)56
Louisiana68Most18February - November (southern), March - September (northern)51
Georgia63Most2March - September19
South Carolina61No cases reportedMarch - September13
Alabama60MostNo cases reportedMarch - September26
Kentucky60No cases reportedEarly April - September13
New Jersey602Late April - September14
North Carolina60Most3Early April - September15
Oklahoma60Most6Early April - September (northern), March - September (southern)52
Pennsylvania605Late April - September22
Ohio59No cases reportedEarly April - September (southern), Late April - September (northern)18
Delaware57LeastNo cases reportedLate April - September4
Iowa57No cases reportedLate April - September17
New Mexico57No cases reportedMarch - September80
Wisconsin56No cases reportedMay - September25
Arkansas552March - September (southern), Early April - Semptember (northern)11
Indiana552Early April - September (southern), Late April - September (northern)13
Michigan553May - September24
Connecticut54No cases reportedLate April - September4
Illinois526Early April - September (southern), Late April - September (northern)116
Massachusetts512May - September6
California50Least9March - September (southern), Early April - September (northern)409
Idaho50No cases reportedLate April - September (southern), May - September (northern)36
Maryland501May - September11
Minnesota502May - September63
Mississippi506March - September37
Missouri502Early April - September35
Montana50Most2May - September42
Nebraska5017Late April - September150
Oregon50No cases reportedLate April - September (most of state), May - September (northern edge)17
Utah50No cases reportedEarly April - September8
Virginia50Most1Early April - September12
Rhode Island46No cases reportedLate April - September1
Colorado45No cases reportedEarly April - September634
Maine451May - September
Vermont45No cases reportedMay - September
Wyoming45No cases reportedLate April - September27
New Hampshire43No cases reportedMay - September1
South Dakota43Most7Late April - September (southern), May - September (northern)93
Arizona40Least13March - September82
Nevada40Least23March-September (southern tip), Early April-Semptember (rest of state)1
Washington40No cases reportedMay - September4
North Dakota382May - September58
Alaska30No cases reportedMay - September (southern region)
West Virginia26LeastNo cases reportedEarly April - September (southern), Late April - September (northern tip)2
Tennessee93Early April - September15
Hawaii8LeastNo cases reportedFebruary - November
Kansas23Early April - September66
United States2,565

Sources