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Table 9. Chlamydia — Reported Cases and Rates of Reported Cases in Counties and Independent Cities* Ranked by Number of Reported Cases, United States, 2016

Rank* County/Independent City Cases Rate per 100,000 Population Cumulative Percentage
1 Los Angeles County, CA 59,116 581.3 3
2 Cook County, IL 41,056 783.8 6
3 Harris County, TX 27,847 613.6 8
4 Maricopa County, AZ 22,134 531.1 9
5 Philadelphia County, PA 19,992 1,275.5 10
6 Kings County, NY 19,900 754.7 11
7 San Diego County, CA 18,937 573.9 13
8 Bronx County, NY 17,043 1,171.0 14
9 New York County, NY 15,216 925.3 15
10 Wayne County, MI 14,082 800.4 15
11 Bexar County, TX 13,724 723.2 16
12 Queens County, NY 12,904 551.7 17
13 Orange County, CA 12,827 404.7 18
14 Miami-Dade County, FL 12,687 471.1 19
15 Dallas County, TX 12,216 478.4 20
16 San Bernardino County, CA 11,495 540.1 20
17 Clark County, NV 11,362 537.3 21
18 Milwaukee County, WI 10,751 1,122.5 22
19 Cuyahoga County, OH 10,090 803.4 22
20 Broward County, FL 9,928 523.5 23
21 Marion County, IN 9,815 1,045.2 23
22 Franklin County, OH 9,712 775.9 24
23 King County, WA 9,422 445.0 25
24 Tarrant County, TX 9,230 465.6 25
25 Travis County, TX 8,618 732.5 26
26 Riverside County, CA 8,586 363.7 26
27 Sacramento County, CA 8,525 567.8 27
28 Orange County, FL 8,354 648.5 27
29 Fulton County, GA 8,292 820.5 28
30 San Francisco County, CA 8,175 945.3 28
31 Alameda County, CA 8,166 498.5 29
32 Hillsborough County, FL 8,066 597.9 29
33 Mecklenburg County, NC 7,969 770.6 30
34 Shelby County, TN 7,838 835.5 30
35 Hennepin County, MN 7,575 619.3 31
36 Baltimore (City), MD 7,394 1,189.0 31
37 Santa Clara County, CA 6,979 363.9 32
38 Hamilton County, OH 6,915 856.2 32
39 Prince George's County, MD 6,753 742.5 33
40 Duval County, FL 6,634 726.6 33
41 Fresno County, CA 6,473 664.0 33
42 Collin County, TX 6,364 696.2 34
43 Kern County, CA 6,307 714.9 34
44 Denver County, CO 6,300 923.0 35
45 Allegheny County, PA 6,020 489.2 35
46 Pima County, AZ 5,819 576.1 35
47 DeKalb County, GA 5,799 789.1 36
48 Essex County, NJ 5,726 718.1 36
49 St. Louis County, MO 5,698 567.9 36
50 Jackson County, MO 5,585 812.2 37
51 Wake County, NC 5,502 537.2 37
52 Palm Beach County, FL 5,455 383.4 37
53 Honolulu County, HI 5,399 540.6 38
54 Oklahoma County, OK 5,273 678.8 38
55 Jefferson County, KY 5,221 683.7 38
56 Contra Costa County, CA 5,205 462.0 39
57 Erie County, NY 5,201 563.7 39
58 Salt Lake County, UT 5,106 461.1 39
59 Multnomah County, OR 5,065 640.9 40
60 Pierce County, WA 4,965 588.3 40
61 Bernalillo County, NM 4,759 703.3 40
62 Middlesex County, MA 4,729 298.3 41
63 Monroe County, NY 4,706 627.8 41
64 Orleans Parish, LA 4,632 1,188.9 41
65 Guilford County, NC 4,594 887.6 42
66 Suffolk County, NY 4,506 300.1 42
67 Davidson County, TN 4,476 659.3 42
68 Etowah County, AL 4,348 4,219.0 42
69 Hartford County, CT 4,219 471.0 43
70 Baltimore County, MD 4,190 504.1 43

* The top 70 counties and independent cities ranked in descending order by number of cases reported in 2016 then by rate are displayed.

NOTE: Relative rankings of counties may be impacted by completeness of the variable used to identify county. In 2016, the variable used to identify county was complete for ≤95% of cases in Alabama and Massachusetts. See Appendix A1.4 for more information.

County was misclassified in the 2016 Alabama STD morbidity data resulting in inaccurate county-level case counts and rates. Tables will be updated when corrected data are available.

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