| Lyme Disease Cases as Reported to the CDC 1990-1999 | ||||||||||
| 1990 | 1991 | 1992 | 1993 | 1994 | 1995 | 1996 | 1997 | 1998 | 1999 | |
| Alabama | 33 | 13 | 10 | 4 | 6 | 12 | 9 | 11 | 24 | 20 |
| Alaska | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 2 | 1 | 0 |
| Arizona | 0 | 1 | 0 | 0 | 0 | 1 | 0 | 4 | 1 | 3 |
| Arkansas | 22 | 31 | 20 | 8 | 15 | 11 | 27 | 27 | 8 | 7 |
| California | 345 | 265 | 231 | 134 | 68 | 84 | 64 | 154 | 135 | 139 |
| Colorado | 0 | 1 | 0 | 0 | 1 | 0 | 0 | 0 | 0 | 3 |
| Connecticut | 704 | 1,192 | 1,760 | 1,350 | 2,030 | 1,548 | 3,104 | 2,297 | 3,434 | 3,215 |
| Delaware | 54 | 73 | 219 | 143 | 106 | 56 | 173 | 109 | 77 | 167 |
| District of Columbia | 5 | 5 | 3 | 2 | 9 | 3 | 3 | 10 | 8 | 6 |
| Florida | 7 | 35 | 24 | 30 | 28 | 17 | 55 | 56 | 71 | 59 |
| Georgia | 161 | 25 | 48 | 44 | 127 | 14 | 1 | 9 | 5 | 0 |
| Guam | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 0 |
| Hawaii | 2 | 0 | 2 | 1 | 0 | 0 | 1 | 0 | 0 | 0 |
| Idaho | 1 | 2 | 2 | 2 | 3 | 0 | 2 | 4 | 7 | 3 |
| Illinois | 30 | 51 | 41 | 19 | 24 | 18 | 10 | 13 | 14 | 17 |
| Indiana | 15 | 16 | 22 | 32 | 19 | 19 | 32 | 33 | 39 | 21 |
| Iowa | 16 | 22 | 33 | 8 | 17 | 16 | 19 | 8 | 27 | 24 |
| Kansas | 14 | 22 | 18 | 54 | 17 | 23 | 36 | 4 | 13 | 16 |
| Kentucky | 18 | 44 | 28 | 16 | 24 | 16 | 26 | 20 | 27 | 19 |
| Louisiana | 3 | 6 | 7 | 3 | 4 | 9 | 9 | 13 | 15 | 9 |
| Maine | 9 | 15 | 16 | 18 | 33 | 45 | 63 | 34 | 78 | 41 |
| Maryland | 238 | 282 | 183 | 180 | 341 | 454 | 447 | 494 | 659 | 899 |
| Massachusetts | 117 | 265 | 223 | 148 | 247 | 189 | 321 | 291 | 699 | 787 |
| Michigan | 134 | 46 | 35 | 23 | 33 | 5 | 28 | 27 | 17 | 11 |
| Minnesota | 70 | 84 | 197 | 141 | 208 | 208 | 251 | 256 | 261 | 283 |
| Mississippi | 7 | 8 | 0 | 0 | 0 | 17 | 24 | 27 | 17 | 4 |
| Missouri | 205 | 207 | 150 | 108 | 102 | 53 | 52 | 28 | 12 | 72 |
| Nebraska | 0 | 25 | 22 | 6 | 3 | 6 | 5 | 2 | 4 | 11 |
| Nevada | 2 | 5 | 1 | 5 | 1 | 6 | 2 | 2 | 6 | 2 |
| New Hampshire | 4 | 38 | 44 | 15 | 30 | 28 | 47 | 39 | 45 | 27 |
| New Jersey | 1,074 | 915 | 688 | 786 | 1,533 | 1,703 | 2,190 | 2,041 | 1,911 | 1,719 |
| New Mexico | 0 | 3 | 2 | 2 | 5 | 1 | 1 | 1 | 4 | 1 |
| New York | 3,244 | 3,944 | 3,448 | 2,818 | 5,200 | 4,438 | 5,301 | 3,327 | 4,640 | 4,402 |
| North Carolina | 87 | 73 | 67 | 86 | 77 | 84 | 66 | 34 | 63 | 74 |
| North Dakota | 3 | 2 | 1 | 2 | 0 | 0 | 2 | 0 | 0 | 1 |
| Ohio | 36 | 112 | 32 | 30 | 45 | 30 | 32 | 40 | 47 | 47 |
| Oklahoma | 13 | 29 | 27 | 19 | 99 | 63 | 42 | 45 | 13 | 8 |
| Oregon | 11 | 5 | 13 | 8 | 6 | 20 | 19 | 20 | 21 | 15 |
| Pennsylvania | 553 | 718 | 1,173 | 1,085 | 1,438 | 1,562 | 2,814 | 2,188 | 2,760 | 2,781 |
| Puerto Rico | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| Rhode Island | 101 | 142 | 275 | 272 | 471 | 345 | 534 | 442 | 789 | 546 |
| South Carolina | 7 | 10 | 2 | 9 | 7 | 17 | 9 | 3 | 8 | 6 |
| South Dakota | 2 | 1 | 1 | 0 | 0 | 0 | 0 | 1 | 0 | 0 |
| Tennessee | 28 | 35 | 31 | 20 | 13 | 28 | 24 | 45 | 47 | 59 |
| Texas | 44 | 57 | 113 | 48 | 56 | 77 | 97 | 60 | 32 | 72 |
| Utah | 1 | 2 | 6 | 2 | 3 | 1 | 1 | 1 | 0 | 2 |
| Vermont | 11 | 7 | 9 | 12 | 16 | 9 | 26 | 8 | 11 | 26 |
| Virginia | 129 | 151 | 123 | 95 | 131 | 55 | 57 | 67 | 73 | 122 |
| Washington | 30 | 7 | 14 | 9 | 4 | 10 | 18 | 11 | 7 | 14 |
| West Virginia | 11 | 43 | 14 | 50 | 29 | 26 | 12 | 10 | 13 | 20 |
| Wisconsin | 337 | 424 | 525 | 401 | 409 | 369 | 396 | 480 | 657 | 490 |
| Wyoming | 5 | 11 | 5 | 9 | 5 | 4 | 3 | 3 | 1 | 3 |
| 1990 | 1991 | 1992 | 1993 | 1994 | 1995 | 1996 | 1997 | 1998 | 1999 | |
| 7,943 | 9,470 | 9,908 | 8,257 | 13,043 | 11,700 | 16,455 | 12,801 | 16,802 | 16,273 | |
| Notes: | Figures are not available for 1981. | |||||||||
| In Hawaii Lyme Disease is not a Notifiable Disease. | ||||||||||
| Montana is not accepting reports until isolation of the disease. | ||||||||||