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Table 9. Chlamydia - Reported Cases and Rates in Counties and Independent Cities* Ranked by Number of Reported Cases, United States, 2011


Rank† County/Independent City Cases Rate per 100,000 Population Cumulative Percentage
1Los Angeles County, CA 50,542 514.8 3
2Cook County, IL 36,769 707.8 6
3Harris County, TX 21,631 528.6 7
4Philadelphia County, PA 20,4711,341.5 9
5Kings County, NY 20,123 803.4 10
6Wayne County, MI 19,8001,087.6 11
7Bronx County, NY 18,0371,302.2 13
8Dallas County, TX 17,265 729.1 14
9Maricopa County, AZ 16,667 436.6 15
10San Diego County, CA 15,346 495.8 16
11Queens County, NY 12,930 579.6 17
12New York County, NY 12,562 792.1 18
13Bexar County, TX 11,904 694.2 19
14San Bernardino County, CA 10,947 537.9 20
15Milwaukee County, WI 10,8641,146.3 20
16Cuyahoga County, OH 10,301 804.7 21
17Shelby County, TN 9,8021,056.7 22
18Riverside County, CA 9,802 447.7 23
19Sacramento County, CA 9,331 657.7 23
20Marion County, IN 9,1181,009.3 24
21Miami-Dade County, FL 8,827 353.6 24
22Clark County, NV 8,337 427.3 25
23Tarrant County, TX 8,053 445.2 26
24Orange County, CA 8,010 266.1 26
25Baltimore (City), MD 7,8371,262.1 27
26Mecklenburg County, NC 7,518 817.5 27
27Fulton County, GA 7,456 809.9 28
28Franklin County, OH 7,412 637.1 28
29Hillsborough County, FL 7,290 593.1 29
30Broward County, FL 7,091 405.6 29
31Alameda County, CA 7,040 466.1 30
32Washington, D.C. 6,5851,094.4 30
33Hamilton County, OH 6,449 803.7 31
34King County, WA 6,386 330.7 31
35Travis County, TX 6,309 616.0 32
36Suffolk County, MA 6,212 860.4 32
37Prince George's County, MD 6,086 704.9 33
38Orange County, FL 6,076 530.2 33
39Allegheny County, PA 6,000 490.5 33
40Orleans County, LA 5,9701,736.3 34
41Fresno County, CA 5,960 640.6 34
42Duval County, FL 5,939 687.2 35
43Santa Clara County, CA 5,764 323.5 35
44Hennepin County, MN 5,719 496.3 35
45Jackson County, MO 5,676 841.9 36
46Jefferson County, AL 5,636 855.9 36
47Kern County, CA 5,590 665.8 37
48St. Louis County, MO 5,548 555.4 37
49Denver County, CO 5,533 921.9 37
50Essex County, NJ 5,263 671.3 38
51Jefferson County, KY 5,125 691.5 38
52Guilford County, NC 5,0931,042.8 39
53Erie County, NY 5,065 551.1 39
54DeKalb County, GA 5,053 730.3 39
55Monroe County, NY 5,009 672.9 40
56Wake County, NC 4,961 550.6 40
57Honolulu County, HI 4,794 502.9 40
58San Francisco County, CA 4,778 593.4 41
59St. Louis (City), MO 4,6421,453.8 41
60El Paso County, TX 4,528 565.5 41
61Contra Costa County, CA 4,404 419.8 42
62Hartford County, CT 4,223 472.4 42
63Pierce County, WA 4,184 526.1 42
64New Haven County, CT 4,123 478.0 43
65Pima County, AZ 4,078 416.0 43
66Davidson County, TN 4,062 648.2 43
67Multnomah County, OR 3,957 538.1 43
68Bell County, TX 3,9511,273.6 44
69Bernalillo County, NM 3,870 584.1 44
70Pinellas County, FL 3,868 422.0 44

*Accounting for 44% of reported chlamydia cases.

† Counties and independent cities were ranked in descending order by number of cases reported in 2011.

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