Lyme Disease Data Tables: Historical Data

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Reported cases of Lyme disease by state or locality, 2009-2018†

Information regarding the collection and limitations of these surveillance data

Reported cases of Lyme disease by state or locality, 2009-2018
State 2009 2010 2011 2012 2013 2014 2015 2016 2017 2018
Confirmed		 2018
Probable		 2018
Incidence*
Alabama 3 1 9 13 11 28  14 17 25 20 16 0.4
Alaska 7 7 9 4 14 5  1 6 8 8 3 1.1
Arizona 3 2 8 7 22 14  8 8 18 7 0 0.1
Arkansas 0 0 0 0 0 0  0 0 2 0 4 0.0
California 117 126 79 61 90 54  83 90 84 62 42 0.2
Colorado 0 1 0 0 0 0  0 0 4 3 0 0.1
Connecticut 2751 1964 2004 1653 2111 1719  1873 1238 1381 1268 591 35.5
Delaware 984 656 767 507 400 341  334 391 421 505 15 52.2
District of Columbia 53 34 N N 33 35  78 66 62 57 22 8.1
Florida 77 56 78 67 87 85  116 132 124 98 71 0.5
Georgia 40 10 32 31 8 4  8 4 8 4 15 0.0
Hawaii 0 0 0 0 0 0  0 0 0 0 0 0.0
Idaho 4 6 3 0 14 8  3 9 15 5 4 0.3
Illinois 136 135 194 204 337 233  287 233 218 189 87 1.5
Indiana 61 62 81 64 101 100  102 127 92 72 83 1.1
Iowa 77 68 72 92 153 110  130 76 112 91 192 2.9
Kansas 18 7 11 9 18 12  11 16 13 8 22 0.3
Kentucky 1 5 3 8 17 11  12 16 6 4 18 0.1
Louisiana 0 2 1 3 0 0  2 4 8 2 2 0.0
Maine 791 559 801 885 1127 1169  993 1151 1424 1111 294 83.0
Maryland 1466 1163 938 1113 801 957  1249 1274 1194 894 488 14.8
Massachusetts 4019 2380 1801 3396 3816 3646  2922 146 321 13 3 0.2
Michigan 81 76 89 80 114 93  125 159 196 184 78 1.8
Minnesota 1063 1293 1185 911 1431 896  1174 1304 1408 950 591 16.9
Mississippi 0 0 3 1 0 2  4 1 1 1 3 0.0
Missouri 3 4 5 1 1 7  2 1 2 3 8 0.0
Montana 3 3 9 6 16 5  2 12 4 5 2 0.5
Nebraska 4 7 7 5 7 6  5 10 6 8 7 0.4
Nevada 10 2 3 10 11 4  5 4 7 5 9 0.2
New Hampshire 996 830 887 1002 1324 622  436 691 956 927 501 68.3
New Jersey 4598 3320 3398 2732 2785 2589  3932 3332 3629 2876 1124 32.3
New Mexico 1 3 2 1 0 0  0 0 3 0 2 0.0
New York 4134 2385 3118 2044 3512 2853  3252 2623 3502 2446 1192 12.5
North Carolina 21 21 18 27 39 27  38 32 70 56 156 0.5
North Dakota 10 21 22 10 12 2  15 9 12 14 19 1.8
Ohio 51 21 36 49 74 94  112 122 233 243 50 2.1
Oklahoma 2 0 2 1 1 0  0 0 0 0 0 0.0
Oregon 12 7 9 5 12 3  3 13 13 7 63 0.2
Pennsylvania 4950 3298 4739 4146 4981 6470  7351 8988 9250 7920 2288 61.8
Rhode Island 150 115 111 133 444 570  564 535 595 661 450 62.5
South Carolina 25 19 24 35 33 20  13 25 13 9 30 0.2
South Dakota 1 1 2 4 3 2  5 8 4 4 3 0.5
Tennessee 10 6 5 2 11 7  6 7 15 12 17 0.2
Texas 88 55 28 33 48 20  18 31 31 20 27 0.1
Utah 6 3 6 2 10 5  3 12 10 11 16 0.3
Vermont 323 271 476 386 674 442  491 488 646 348 228 55.6
Virginia 698 911 756 805 925 976  1102 976 1041 744 395 8.7
Washington 15 12 17 13 11 8  17 14 26 8 12 0.1
West Virginia 143 128 107 82 116 112  243 297 503 554 117 30.7
Wisconsin 1952 2505 2408 1368 1447 991  1309 1504 1794 1121 748 19.3
Wyoming 1 0 1 3 1 2  0 1 3 0 0 0.0
U.S. TOTAL 29,959 22,561 24,364 22,014 27,203 25,359  28,453 26,203 29,513 23,558 10,108 7.2
†confirmed cases presented for all years except most recent
*confirmed cases per 100,000 population
N = not notifiable

Lyme disease incidence rates by state, 2009-2018*

Information regarding the collection and limitations of these surveillance data

Lyme disease incidence rates by state, 2009-2018
State 2009 2010 2011 2012 2013 2014 2015 2016 2017 2018 3-Year Average
Incidence
Alabama 0.1 0.0 0.2 0.3 0.2 0.6 0.3 0.3 0.5 0.4 0.4
Alaska 1.0 1.0 1.2 0.5 1.9 0.7 0.1 0.8 1.1 1.1 1.0
Arizona 0.0 0.0 0.1 0.1 0.3 0.2 0.1 0.1 0.3 0.1 0.2
Arkansas 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.1 0.0 0.0
California 0.3 0.4 0.0 0.2 0.2 0.1 0.2 0.2 0.2 0.2 0.2
Colorado 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.1 0.1 0.0
Connecticut† 78.2 55.0 56.0 46.0 58.7 47.8 52.2 34.6 38.5 35.5 36.2
Delaware† 111.2 73.1 84.6 55.3 43.2 36.4 35.3 41.1 43.8 52.2 45.7
District of Columbia† 8.8 5.7 N N 5.1 5.3 11.6 9.7 8.9 8.1 8.9
Florida 0.4 0.3 0.4 0.3 0.4 0.4 0.6 0.6 0.6 0.5 0.6
Georgia 0.4 0.1 0.3 0.3 0.1 0.0 0.1 0.0 0.1 0.0 0.1
Hawaii 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0
Idaho 0.3 0.4 0.2 0.0 0.9 0.5 0.2 0.5 0.9 0.3 0.6
Illinois 1.1 1.1 1.5 1.6 2.6 1.8 2.2 1.8 1.7 1.5 1.7
Indiana 0.9 1.0 1.2 1.0 1.5 1.5 1.5 1.9 1.4 1.1 1.5
Iowa 2.6 2.2 2.4 3.0 5.0 3.5 4.2 2.4 3.6 2.9 3.0
Kansas 0.6 0.2 0.4 0.3 0.6 0.4 0.4 0.6 0.4 0.3 0.4
Kentucky 0.0 0.1 0.1 0.2 0.4 0.2 0.3 0.4 0.1 0.1 0.2
Louisiana 0.0 0.0 0.0 0.1 0.0 0.0 0.0 0.1 0.2 0.0 0.1
Maine† 60.0 42.1 60.3 66.6 84.8 87.9 74.7 86.4 106.6 83.0 92.0
Maryland† 25.7 20.1 16.1 18.9 13.5 16.0 20.8 21.2 19.7 14.8 18.6
Massachusetts† 61.0 36.3 27.3 51.1 57.0 54.1 43.0 2.1 4.7 0.2 2.3
Michigan 0.8 0.8 0.9 0.8 1.2 0.9 1.3 1.6 2.0 1.8 1.8
Minnesota† 20.2 24.4 22.2 16.9 26.4 16.4 21.4 23.6 25.2 16.9 21.9
Mississippi 0.0 0.0 0.1 0.0 0.0 0.1 0.1 0.0 0.0 0.0 0.0
Missouri 0.1 0.1 0.1 0.0 0.0 0.1 0.0 0.0 0.0 0.0 0.0
Montana 0.3 0.3 0.9 0.6 1.6 0.5 0.2 1.2 0.4 0.5 0.7
Nebraska 0.2 0.4 0.4 0.3 0.4 0.3 0.3 0.5 0.3 0.4 0.4
Nevada 0.4 0.1 0.1 0.4 0.4 0.1 0.2 0.1 0.2 0.2 0.2
New Hampshire† 75.2 63.0 67.3 75.9 100.0 46.9 32.8 51.8 71.2 68.3 63.8
New Jersey† 52.8 37.8 38.5 30.8 31.3 29.0 43.9 37.3 40.3 32.3 36.6
New Mexico 0.0 0.1 0.1 0.0 0.0 0.0 0.0 0.0 0.1 0.0 0.0
New York† 21.2 12.3 16.0 10.4 17.9 14.4 16.4 13.3 17.6 12.5 14.5
North Carolina 0.2 0.2 0.2 0.3 0.4 0.3 0.4 0.3 0.7 0.5 0.5
North Dakota 1.5 3.1 3.2 1.4 1.7 0.3 2.0 1.2 1.6 1.8 1.5
Ohio 0.4 0.2 0.3 0.4 0.6 0.8 1.0 1.1 2.0 2.1 1.7
Oklahoma 0.1 0.0 0.1 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0
Oregon 0.3 0.2 0.2 0.1 0.3 0.1 0.1 0.3 0.3 0.2 0.3
Pennsylvania† 39.3 26.0 37.2 32.5 39.0 50.6 57.4 70.3 72.2 61.8 68.1
Rhode Island† 14.2 10.9 10.6 12.7 42.2 54.0 53.4 50.6 56.2 62.5 56.4
South Carolina 0.5 0.4 0.5 0.7 0.7 0.4 0.3 0.5 0.3 0.2 0.3
South Dakota 0.1 0.1 0.2 0.5 0.4 0.2 0.6 0.9 0.5 0.5 0.6
Tennessee 0.2 0.1 0.1 0.0 0.2 0.1 0.1 0.1 0.2 0.2 0.2
Texas 0.4 0.2 0.1 0.1 0.2 0.1 0.1 0.1 0.1 0.1 0.1
Utah 0.2 0.1 0.2 0.1 0.3 0.2 0.1 0.4 0.3 0.3 0.4
Vermont† 51.9 43.3 76.0 61.7 107.6 70.5 78.4 78.1 103.6 55.6 79.1
Virginia† 8.9 11.4 9.3 9.8 11.2 11.7 13.1 11.6 12.3 8.7 10.9
Washington 0.2 0.2 0.2 0.2 0.2 0.1 0.2 0.2 0.4 0.1 0.2
West Virginia† 7.9 6.9 5.8 4.4 6.3 6.1 13.2 16.2 27.7 30.7 24.9
Wisconsin† 34.5 44.0 42.2 23.9 25.2 17.2 22.7 26.0 31.0 19.3 25.4
Wyoming 0.2 0.0 0.2 0.5 0.2 0.3 0.0 0.2 0.5 0.0 0.2
U.S. Incidence 9.8 7.3 7.8 7.0 8.6 7.9 8.9 8.1 9.1 7.2 8.1
*incidence=confirmed cases per 100,000 persons
†High Incidence State (average incidence of at least 10 confirmed cases per 100,000 persons for previous three reporting years)
N= not notifiable
Note: Many high incidence states have modified surveillance practices. Contact your state health department for more information.
Page last reviewed: November 22, 2019
Content source: Centers for Disease Control and Prevention, National Center for Emerging and Zoonotic Infectious Diseases (NCEZID), Division of Vector-Borne Diseases (DVBD)