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Table 9. Chlamydia - Counties and Independent Cities* Ranked by Number of Reported Cases, United States, 2010

This web page is archived for historical purposes and is no longer being updated. Newer data is available on the STD Data and Statistics page.

Rank†County/Independent CityCasesRates per 100,000 PopulationCumulative Percentage
1Los Angeles County, CA47,544482.83
2Cook County, IL34,664655.66
3Harris County, TX22,322548.37
4Wayne County, MI21,1551,098.59
5Kings County, NY20,790809.911
6Philadelphia County, PA19,4281,255.612
7Bronx County, NY18,4651,321.514
8Maricopa County, AZ15,567386.915
9Dallas County, TX15,557634.516
10San Diego County, CA15,341502.417
11Queens County, NY11,667505.818
12Bexar County, TX11,441692.819
13New York County, NY11,328695.420
14Milwaukee County, WI10,7071,115.921
15Denver County, CO10,4961,719.721
16Shelby County, TN9,9781,084.322
17Cuyahoga County, OH9,865773.323
18Miami-Dade County, FL8,655346.124
19San Bernardino County, CA8,515422.024
20Orange County, CA8,489280.525
21Baltimore (City), MD8,2471,293.826
22Franklin County, OH8,184711.626
23Tarrant County, TX8,034448.927
24Clark County, NV7,614400.127
25Marion County, IN7,298819.228
26Hillsborough County, FL7,020587.328
27Broward County, FL6,956393.829
28Alameda County, CA6,610443.229
29Sacramento County, CA6,585470.030
30Hamilton County, OH6,377745.830
31Fulton County, GA6,160595.931
32Orange County, FL6,095561.031
33King County, WA6,053315.832
34Fresno County, CA6,025658.332
35Suffolk County, MA6,017798.533
36Prince George's County, MD5,884705.033
37Travis County, TX5,832568.334
38Duval County, FL5,745670.334
39Monroe County, NY5,744782.935
40Washington, D.C.5,589932.035
41Santa Clara County, CA5,518309.235
42Jackson County, MO5,507780.436
43Kern County, CA5,457675.936
44Essex County, NJ5,340693.837
45Jefferson County, AL5,268792.137
46Hennepin County, MN5,242453.437
47St. Louis County, MO5,233527.338
48Erie County, NY5,080558.738
49Allegheny County, PA5,042413.839
50Honolulu County, HI4,827531.939
51Jefferson County, KY4,732655.839
52Mecklenburg County, NC4,628506.540
53Orleans County, LA4,6261,303.640
54San Francisco County, CA4,596563.740

* Accounting for 40% of reported chlamydia cases.

† Counties and independent cities were ranked in descending order by number of cases reported in 2010.

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