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Table 9. Chlamydia—Counties and independent cities* ranked by number of reported cases: United States, 2008

Rank County/Independent City Cases Rate per
100,000 Population
Cumulative Percent
1 Los Angeles County, CA 46,707 472.8 3
2 Cook County, IL 34,257 648.2 6
3 Wayne County, MI 19,218 968.1 8
4 Philadelphia County, PA 17,012 1,173.5 9
5 Kings County, NY 16,983 671.8 11
6 Harris County, TX 16,896 429.3 12
7 Bronx County, NY 15,931 1,159.7 13
8 San Diego County, CA 14,373 483.1 14
9 Dallas County, TX 13,699 578.9 16
10 Maricopa County, AZ 13,407 345.5 17
11 Queens County, NY 11,682 514.5 18
12 New York County, NY 10,887 671.7 19
13 Shelby County, TN 9,804 1,077.2 19
14 Bexar County, TX 8,964 562.2 20
15 Orange County, CA 8,569 285.9 21
16 San Bernardino County, CA 8,547 425.7 22
17 Baltimore (City), MD 8,421 1,321.0 22
18 Tarrant County, TX 7,923 461.3 23
19 Clark County, NV 7,753 422.2 24
20 Marion County, IN 7,572 863.6 24
21 Miami-Dade County, FL 7,564 316.9 25
22 Franklin County, OH 7,460 667.2 25
23 Cuyahoga County, OH 7,360 567.9 26
24 Alameda County, CA 7,132 487.1 27
25 Hamilton County, OH 7,030 834.6 27
26 Broward County, FL 6,982 396.8 28
27 Sacramento County, CA 6,958 501.8 28
28 Washington, D.C. 6,924 1,177.0 29
29 Hillsborough County, FL 6,264 533.2 29
30 Duval County, FL 6,136 722.6 30
31 King County, WA 6,057 325.8 30
32 Travis County, TX 5,837 599.1 31
33 Kern County, CA 5,822 736.3 31
34 Jefferson County, AL 5,814 882.5 32
35 Orange County, FL 5,764 540.7 32
36 Santa Clara County, CA 5,650 323.0 33
37 Fresno County, CA 5,576 620.0 33
38 Jackson County, MO 5,567 834.8 34
39 Fulton County, GA 5,363 540.6 34
40 Prince George's County, MD 5,239 632.1 35
41 Allegheny County, PA 5,203 426.8 35
42 St. Louis County, MO 5,139 516.4 35
43 Riverside County, CA 5,010 241.6 36
44 Hennepin County, MN 5,002 440.1 36
45 Essex County, NJ 4,960 639.1 37
46 Denver County, CO 4,919 836.1 37
47 Suffolk County, MA 4,883 684.8 38
48 DeKalb County, GA 4,790 649.9 38
49 Honolulu County, HI 4,769 526.6 38
50 Erie County, NY 4,722 517.0 39
51 Monroe County, NY 4,666 639.5 39
52 Oklahoma County, OK 4,366 622.1 39
53 St Louis (City), MO 4,298 1,225.3 40
54 Hartford County, CT 4,286 488.8 40

* Accounting for 40% of reported chlamydia cases.

Counties and independent cities were ranked in descending order by number of cases reported in 2008.

NOTE: Milwaukee County was not ranked by case count or rate due to misclassification of 2008 Milwaukee County STD morbidity data.

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