Table 9. Chlamydia - Reported Cases and Rates in Counties and Independent Cities* Ranked by Number of Reported Cases, United States, 2011
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| Rank† | County/Independent City | Cases | Rate per 100,000 Population | Cumulative Percentage |
|---|---|---|---|---|
| 1 | Los Angeles County, CA | 50,542 | 514.8 | 3 |
| 2 | Cook County, IL | 36,769 | 707.8 | 6 |
| 3 | Harris County, TX | 21,631 | 528.6 | 7 |
| 4 | Philadelphia County, PA | 20,471 | 1,341.5 | 9 |
| 5 | Kings County, NY | 20,123 | 803.4 | 10 |
| 6 | Wayne County, MI | 19,800 | 1,087.6 | 11 |
| 7 | Bronx County, NY | 18,037 | 1,302.2 | 13 |
| 8 | Dallas County, TX | 17,265 | 729.1 | 14 |
| 9 | Maricopa County, AZ | 16,667 | 436.6 | 15 |
| 10 | San Diego County, CA | 15,346 | 495.8 | 16 |
| 11 | Queens County, NY | 12,930 | 579.6 | 17 |
| 12 | New York County, NY | 12,562 | 792.1 | 18 |
| 13 | Bexar County, TX | 11,904 | 694.2 | 19 |
| 14 | San Bernardino County, CA | 10,947 | 537.9 | 20 |
| 15 | Milwaukee County, WI | 10,864 | 1,146.3 | 20 |
| 16 | Cuyahoga County, OH | 10,301 | 804.7 | 21 |
| 17 | Shelby County, TN | 9,802 | 1,056.7 | 22 |
| 18 | Riverside County, CA | 9,802 | 447.7 | 23 |
| 19 | Sacramento County, CA | 9,331 | 657.7 | 23 |
| 20 | Marion County, IN | 9,118 | 1,009.3 | 24 |
| 21 | Miami-Dade County, FL | 8,827 | 353.6 | 24 |
| 22 | Clark County, NV | 8,337 | 427.3 | 25 |
| 23 | Tarrant County, TX | 8,053 | 445.2 | 26 |
| 24 | Orange County, CA | 8,010 | 266.1 | 26 |
| 25 | Baltimore (City), MD | 7,837 | 1,262.1 | 27 |
| 26 | Mecklenburg County, NC | 7,518 | 817.5 | 27 |
| 27 | Fulton County, GA | 7,456 | 809.9 | 28 |
| 28 | Franklin County, OH | 7,412 | 637.1 | 28 |
| 29 | Hillsborough County, FL | 7,290 | 593.1 | 29 |
| 30 | Broward County, FL | 7,091 | 405.6 | 29 |
| 31 | Alameda County, CA | 7,040 | 466.1 | 30 |
| 32 | Washington, D.C. | 6,585 | 1,094.4 | 30 |
| 33 | Hamilton County, OH | 6,449 | 803.7 | 31 |
| 34 | King County, WA | 6,386 | 330.7 | 31 |
| 35 | Travis County, TX | 6,309 | 616.0 | 32 |
| 36 | Suffolk County, MA | 6,212 | 860.4 | 32 |
| 37 | Prince George's County, MD | 6,086 | 704.9 | 33 |
| 38 | Orange County, FL | 6,076 | 530.2 | 33 |
| 39 | Allegheny County, PA | 6,000 | 490.5 | 33 |
| 40 | Orleans County, LA | 5,970 | 1,736.3 | 34 |
| 41 | Fresno County, CA | 5,960 | 640.6 | 34 |
| 42 | Duval County, FL | 5,939 | 687.2 | 35 |
| 43 | Santa Clara County, CA | 5,764 | 323.5 | 35 |
| 44 | Hennepin County, MN | 5,719 | 496.3 | 35 |
| 45 | Jackson County, MO | 5,676 | 841.9 | 36 |
| 46 | Jefferson County, AL | 5,636 | 855.9 | 36 |
| 47 | Kern County, CA | 5,590 | 665.8 | 37 |
| 48 | St. Louis County, MO | 5,548 | 555.4 | 37 |
| 49 | Denver County, CO | 5,533 | 921.9 | 37 |
| 50 | Essex County, NJ | 5,263 | 671.3 | 38 |
| 51 | Jefferson County, KY | 5,125 | 691.5 | 38 |
| 52 | Guilford County, NC | 5,093 | 1,042.8 | 39 |
| 53 | Erie County, NY | 5,065 | 551.1 | 39 |
| 54 | DeKalb County, GA | 5,053 | 730.3 | 39 |
| 55 | Monroe County, NY | 5,009 | 672.9 | 40 |
| 56 | Wake County, NC | 4,961 | 550.6 | 40 |
| 57 | Honolulu County, HI | 4,794 | 502.9 | 40 |
| 58 | San Francisco County, CA | 4,778 | 593.4 | 41 |
| 59 | St. Louis (City), MO | 4,642 | 1,453.8 | 41 |
| 60 | El Paso County, TX | 4,528 | 565.5 | 41 |
| 61 | Contra Costa County, CA | 4,404 | 419.8 | 42 |
| 62 | Hartford County, CT | 4,223 | 472.4 | 42 |
| 63 | Pierce County, WA | 4,184 | 526.1 | 42 |
| 64 | New Haven County, CT | 4,123 | 478.0 | 43 |
| 65 | Pima County, AZ | 4,078 | 416.0 | 43 |
| 66 | Davidson County, TN | 4,062 | 648.2 | 43 |
| 67 | Multnomah County, OR | 3,957 | 538.1 | 43 |
| 68 | Bell County, TX | 3,951 | 1,273.6 | 44 |
| 69 | Bernalillo County, NM | 3,870 | 584.1 | 44 |
| 70 | Pinellas 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.
- Page last reviewed: December 13, 2012 (archived document)
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