Lyme Disease Data Tables: Historical Data

Related Pages

Reported cases of Lyme disease by state or locality, 2010-2019†

Information regarding the collection and limitations of these surveillance data

Reported cases of Lyme disease by state or locality, 2009-2019
State 2010 2011 2012 2013 2014 2015 2016 2017 2018 2019
Confirmed		 2019
Probable		 2019
Incidence*
Alabama 1 9 13 11 28  14 17 25 20 44 22 0.9
Alaska 7 9 4 14 5  1 6 8 8 1 2 0.1
Arizona 2 8 7 22 14  8 8 18 7 6 4 0.1
Arkansas 0 0 0 0 0  0 0 2 0 5 13 0.2
California 126 79 61 90 54  83 90 84 62 82 62 0.2
Colorado 1 0 0 0 0  0 0 4 3 8 0 0.1
Connecticut 1964 2004 1653 2111 1719  1873 1238 1381 1268 795 438 22.3
Delaware 656 767 507 400 341  334 391 421 505 619 22 63.6
District of Columbia 34 N N 33 35  78 66 62 57 57 43 8.1
Florida 56 78 67 87 85  116 132 124 98 78 84 0.4
Georgia 10 32 31 8 4  8 4 8 4 2 16 0.0
Hawaii 0 0 0 0 0  0 0 0 0 0 0 0.0
Idaho 6 3 0 14 8  3 9 15 5 5 9 0.3
Illinois 135 194 204 337 233  287 233 218 189 242 153 1.9
Indiana 62 81 64 101 100  102 127 92 72 102 87 1.5
Iowa 68 72 92 153 110  130 76 112 91 70 233 2.2
Kansas 7 11 9 18 12  11 16 13 8 13 22 0.4
Kentucky 5 3 8 17 11  12 16 6 4 12 10 0.3
Louisiana 2 1 3 0 0  2 4 8 2 8 0 0.2
Maine 559 801 885 1127 1169  993 1151 1424 1111 1629 538 121.2
Maryland 1163 938 1113 801 957  1249 1274 1194 894 804 613 13.3
Massachusetts 2380 1801 3396 3816 3646  2922 146 321 13 6 1 0.1
Michigan 76 89 80 114 93  125 159 196 184 276 137 2.8
Minnesota 1293 1185 911 1431 896  1174 1304 1408 950 915 613 16.2
Mississippi 0 3 1 0 2  4 1 1 1 4 0 0.1
Missouri 4 5 1 1 7  2 1 2 3 2 15 0.0
Montana 3 9 6 16 5  2 12 4 5 6 2 0.6
Nebraska 7 7 5 7 6  5 10 6 8 4 6 0.2
Nevada 2 3 10 11 4  5 4 7 5 4 13 0.1
New Hampshire 830 887 1002 1324 622  436 691 956 927 1106 604 81.3
New Jersey 3320 3398 2732 2785 2589  3932 3332 3629 2876 2400 1219 27.0
New Mexico 3 2 1 0 0  0 0 3 0 4 3 0.2
New York 2385 3118 2044 3512 2853  3252 2623 3502 2446 2847 1396 14.6
North Carolina 21 18 27 39 27  38 32 70 56 92 242 0.9
North Dakota 21 22 10 12 2  15 9 12 14 14 24 1.8
Ohio 21 36 49 74 94  112 122 233 243 388 79 3.3
Oklahoma 0 2 1 1 0  0 0 0 0 0 0 0.0
Oregon 7 9 5 12 3  3 13 13 7 10 55 0.2
Pennsylvania 3298 4739 4146 4981 6470  7351 8988 9250 7920 6763 2235 52.8
Rhode Island 115 111 133 444 570  564 535 595 661 527 444 49.7
South Carolina 19 24 35 33 20  13 25 13 9 17 30 0.3
South Dakota 1 2 4 3 2  5 8 4 4 7 3 0.8
Tennessee 6 5 2 11 7  6 7 15 12 23 22 0.3
Texas 55 28 33 48 20  18 31 31 20 15 26 0.1
Utah 3 6 2 10 5  3 12 10 11 5 14 0.2
Vermont 271 476 386 674 442  491 488 646 348 706 358 113.1
Virginia 911 756 805 925 976  1102 976 1041 744 788 411 9.2
Washington 12 17 13 11 8  17 14 26 8 18 25 0.2
West Virginia 128 107 82 116 112  243 297 503 554 703 182 39.2
Wisconsin 2505 2408 1368 1447 991  1309 1504 1794 1121 1219 959 20.9
Wyoming 0 1 3 1 2  0 1 3 0 2 3 0.3
U.S. TOTAL 22,561 24,364 22,014 27,203 25,359  28,453 26,203 29,513 23,558 23,453 11,492 7.1
†confirmed cases presented for all years except most recent
*confirmed cases per 100,000 population
N = not notifiable

Lyme disease incidence rates by state, 2010-2019*

Information regarding the collection and limitations of these surveillance data

Lyme disease incidence rates by state, 2009-2019
State 2010 2011 2012 2013 2014 2015 2016 2017 2018 2019 3-Year Average
Incidence
Alabama 0.0 0.2 0.3 0.2 0.6 0.3 0.3 0.5 0.4 0.9 0.6
Alaska 1.0 1.2 0.5 1.9 0.7 0.1 0.8 1.1 1.1 0.1 0.8
Arizona 0.0 0.1 0.1 0.3 0.2 0.1 0.1 0.3 0.1 0.1 0.1
Arkansas 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.1 0.0 0.2 0.1
California 0.4 0.0 0.2 0.2 0.1 0.2 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 0.1 0.1 0.1 0.1
Connecticut† 55.0 56.0 46.0 58.7 47.8 52.2 34.6 38.5 35.5 22.3 32.1
Delaware† 73.1 84.6 55.3 43.2 36.4 35.3 41.1 43.8 52.2 63.6 53.2
District of Columbia† 5.7 N N 5.1 5.3 11.6 9.7 8.9 8.1 8.1 8.4
Florida 0.3 0.4 0.3 0.4 0.4 0.6 0.6 0.6 0.5 0.4 0.5
Georgia 0.1 0.3 0.3 0.1 0.0 0.1 0.0 0.1 0.0 0.0 0.0
Hawaii 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0
Idaho 0.4 0.2 0.0 0.9 0.5 0.2 0.5 0.9 0.3 0.3 0.5
Illinois 1.1 1.5 1.6 2.6 1.8 2.2 1.8 1.7 1.5 1.9 1.7
Indiana 1.0 1.2 1.0 1.5 1.5 1.5 1.9 1.4 1.1 1.5 1.3
Iowa 2.2 2.4 3.0 5.0 3.5 4.2 2.4 3.6 2.9 2.2 2.9
Kansas 0.2 0.4 0.3 0.6 0.4 0.4 0.6 0.4 0.3 0.4 0.4
Kentucky 0.1 0.1 0.2 0.4 0.2 0.3 0.4 0.1 0.1 0.3 0.2
Louisiana 0.0 0.0 0.1 0.0 0.0 0.0 0.1 0.2 0.0 0.2 0.1
Maine† 42.1 60.3 66.6 84.8 87.9 74.7 86.4 106.6 83.0 121.2 103.6
Maryland† 20.1 16.1 18.9 13.5 16.0 20.8 21.2 19.7 14.8 13.3 15.9
Massachusetts† 36.3 27.3 51.1 57.0 54.1 43.0 2.1 4.7 0.2 0.1 1.7
Michigan 0.8 0.9 0.8 1.2 0.9 1.3 1.6 2.0 1.8 2.8 2.2
Minnesota† 24.4 22.2 16.9 26.4 16.4 21.4 23.6 25.2 16.9 16.2 19.5
Mississippi 0.0 0.1 0.0 0.0 0.1 0.1 0.0 0.0 0.0 0.1 0.1
Missouri 0.1 0.1 0.0 0.0 0.1 0.0 0.0 0.0 0.0 0.0 0.0
Montana 0.3 0.9 0.6 1.6 0.5 0.2 1.2 0.4 0.5 0.6 0.5
Nebraska 0.4 0.4 0.3 0.4 0.3 0.3 0.5 0.3 0.4 0.2 0.3
Nevada 0.1 0.1 0.4 0.4 0.1 0.2 0.1 0.2 0.2 0.1 0.2
New Hampshire† 63.0 67.3 75.9 100.0 46.9 32.8 51.8 71.2 68.3 81.3 73.6
New Jersey† 37.8 38.5 30.8 31.3 29.0 43.9 37.3 40.3 32.3 27.0 33.2
New Mexico 0.1 0.1 0.0 0.0 0.0 0.0 0.0 0.1 0.0 0.2 0.1
New York† 12.3 16.0 10.4 17.9 14.4 16.4 13.3 17.6 12.5 14.6 14.9
North Carolina 0.2 0.2 0.3 0.4 0.3 0.4 0.3 0.7 0.5 0.9 0.7
North Dakota 3.1 3.2 1.4 1.7 0.3 2.0 1.2 1.6 1.8 1.8 1.8
Ohio 0.2 0.3 0.4 0.6 0.8 1.0 1.1 2.0 2.1 3.3 2.5
Oklahoma 0.0 0.1 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0
Oregon 0.2 0.2 0.1 0.3 0.1 0.1 0.3 0.3 0.2 0.2 0.2
Pennsylvania† 26.0 37.2 32.5 39.0 50.6 57.4 70.3 72.2 61.8 52.8 62.3
Rhode Island† 10.9 10.6 12.7 42.2 54.0 53.4 50.6 56.2 62.5 49.7 56.1
South Carolina 0.4 0.5 0.7 0.7 0.4 0.3 0.5 0.3 0.2 0.3 0.3
South Dakota 0.1 0.2 0.5 0.4 0.2 0.6 0.9 0.5 0.5 0.8 0.6
Tennessee 0.1 0.1 0.0 0.2 0.1 0.1 0.1 0.2 0.2 0.3 0.2
Texas 0.2 0.1 0.1 0.2 0.1 0.1 0.1 0.1 0.1 0.1 0.1
Utah 0.1 0.2 0.1 0.3 0.2 0.1 0.4 0.3 0.3 0.2 0.3
Vermont† 43.3 76.0 61.7 107.6 70.5 78.4 78.1 103.6 55.6 113.1 90.8
Virginia† 11.4 9.3 9.8 11.2 11.7 13.1 11.6 12.3 8.7 9.2 10.1
Washington 0.2 0.2 0.2 0.2 0.1 0.2 0.2 0.4 0.1 0.2 0.2
West Virginia† 6.9 5.8 4.4 6.3 6.1 13.2 16.2 27.7 30.7 39.2 32.5
Wisconsin† 44.0 42.2 23.9 25.2 17.2 22.7 26.0 31.0 19.3 20.9 23.7
Wyoming 0.0 0.2 0.5 0.2 0.3 0.0 0.2 0.5 0.0 0.3 0.3
U.S. Incidence 7.3 7.8 7.0 8.6 7.9 8.9 8.1 9.1 7.2 7.1 7.8
*incidence=confirmed cases per 100,000 persons
†High Incidence=average incidence of at least 10 confirmed cases per 100,000 for 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: May 5, 2021
Content source: Centers for Disease Control and Prevention, National Center for Emerging and Zoonotic Infectious Diseases (NCEZID), Division of Vector-Borne Diseases (DVBD)