Annual Summary of Disease Activity

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Infectious Disease Epidemiology, Prevention and Control Division
651-201-5414
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Infectious Disease Epidemiology, Prevention and Control Division
651-201-5414
IDEPC Comment Form

Chlamydia   
Annual Summary of Reportable Diseases

Chlamydia trachomatis infection is the most commonly reported sexually-transmitted infectious disease (STI) in Minnesota. It can cause infection in both men and women, and can cause permanent damage to the female reproductive system. Chlamydia often has no symptoms but can cause serious health problems even without symptoms. 

Published 8/15/2025

2023 Highlights

  • There continue to be great disparities in rates of Chlamydia among populations of color.
  • The majority of cases (59%) occurred in teens and young adults ages 15 to 24 years old.
  • One in three cases occurred in Greater Minnesota, with at least three cases reported in every county in MN. 

Disease

2019

2020

2021

2022

2023

N

R

N

R

N

R

N

R

N

R

Chlamydia

24,535

441

21,942

384.3

22,578

395.4

22,079

386.7

21,767

380.7

N=Number; R=Rate
Note: Data exclude cases diagnosed in federal or private correctional facilities. 2022 intercensal estimates used to compute rates.

Category

Chlamydia

Number

Rate

Total

21,767

381

Residence

Minneapolis

4,993

1267

St. Paul

2,649

896

Suburban**

7,393

344

Greater Minnesota

6,636

288

Age

<15 years

158

14

15-19 years

5,409

1421

20-24 years

7,436

2164

25-29 years

3,633

1015

30-34 years

2,278

662

35-39 years

1,299

402

40-44 years

708

205

45-49 years

368

94

50-54 years

223

65

55+ years

255

20

Gender

Male

8,102

282

Female

13,646

479

Other/unknown^^

19

x

Race^/Ethnicity

White, non-Hispanic

7,912

178

Black, non-Hispanic

6,285

1485

American Indian/ Alaska Native

716

1195

Asian/PI

827

265

Other^^

548

x

Unknown^^

2,605

x

Hispanic^^

2,874

842

* Residence information missing for 96 cases of chlamydia and 19 cases of gonorrhea.
** Suburban is defined as the metropolitan area (Anoka, Carver, Dakota, Hennepin, Ramsey, Scott, and Washington Counties), excluding the cities of Minneapolis and St. Paul.
^ Case counts include persons by race alone. Population counts used to calculate results include race alone or in combination.
^^ No comparable population data available to calculate rates.
^^^ Persons of Hispanic ethnicity may be of any race.
Note: Data exclude cases diagnosed in federal or private correctional facilities. 2022 intercensal estimates used to compute rates.

In 2023, 21,779 chlamydia cases (380.9 per 100,000 population) were reported. This is a 1.3% decrease compared to 2022 (Title of Table). Adolescents and young adults are at highest risk for acquiring a chlamydia infection (Title of Table). The chlamydia rate is highest among 20 to 24-year-olds (2,107 per 100,000), followed by the 15 to 19-year-old age group (1,453 per 100,000). The incidence of chlamydia among adults 25 to 29 years of age (977 per 100,000) is considerably lower but has increased in recent years. The chlamydia rate among females (479 per 100,000) is nearly twice the rate among males (283 per 100,000), most likely due to more frequent screening among females.

Chlamydia infection incidence is highest in communities of color (Title of Table). The rate among Black non-Hispanics (1,569 per 100,000) is 8.3 times higher than the rate among white non-Hispanics (177 per 100,000). Although Black, non-Hispanic persons comprise approximately 7% of Minnesota’s population, they account for 29% of reported chlamydia cases. Rates among Asian/Pacific Islanders (273 per 100,000), Hispanic, any race (879 per 100,000), and American Indian/Alaska Natives (716 per 100,000) were 4.7 to 6.7 times higher than the rate among white, non-Hispanic persons. Chlamydia infections occurred throughout the state, with the highest reported rates in Minneapolis (1,162 per 100,000) and St. Paul (851 per 100,000). Every county in Minnesota had at least three cases in 2023. 

More about Chlamydia 

For up to date information:

Archive of Chlamydia Annual Summaries

Chlamydia trachomatis infection is the most commonly reported STD infectious disease in Minnesota. In 2022, 22,079 chlamydia cases (416 per 100,000 population) were reported. This is a 2% decrease compared to 2021 (Table 3). Adolescents and young adults are at highest risk for acquiring a chlamydia infection (Table 4). The chlamydia rate is highest among 20 to 24-year-olds (2,164 per 100,000), followed by the 15 to 19-year-old age group (1,421 per 100,000). The incidence of chlamydia among adults 25 to 29 years of age (1,015 per 100,000) is considerably lower but has increased in recent years. The chlamydia rate among females (520 per 100,000) is nearly twice the rate among males (311 per 100,000), most likely due to more frequent screening among females. 

Chlamydia infection incidence is highest in communities of color (Table 4). The rate among black non-Hispanics (2,127 per 100,000) is 11.7 times higher than the rate among white non-Hispanics (182 per 100,000). Although black, non-Hispanic persons comprise approximately 5% of Minnesota’s population, they account for 27% of reported chlamydia cases. Rates among Asian/Pacific Islanders (402 per 100,000), Hispanic, any race (895 per 100,000), and American Indian/ Alaska Natives (1014 per 100,000) are 4.9 to 5.6 times higher than the rate among white, non-Hispanic persons. Chlamydia infections occur throughout the state, with the highest reported rates in Minneapolis (1,267 per 100,000) and St. Paul (896 per 100,000). Every county in Minnesota had at least 2 cases in 2022.

Chlamydia trachomatis infection is the most commonly reported infectious disease in Minnesota. In 2021, 22,578 chlamydia cases (425 per 100,000 population) were reported. This is a 3% increase compared to 2020 (Table 3).

Adolescents and young adults are at highest risk for acquiring a chlamydia infection (Table 4). The chlamydia rate is highest among 20 to 24-yearolds (2,249 per 100,000), followed by the 15 to 19-year-old age group (1,494 per 100,000). The incidence of chlamydia among adults 25 to 29 years of age (1,041 per 100,000) is considerably lower but has increased in recent years. The chlamydia rate among females (541 per 100,000) is nearly twice the rate among males (308 per 100,000), most likely due to more frequent screening among females. 

Chlamydia infection incidence is highest in communities of color (Table 4). The rate among black non-Hispanics (2,024 per 100,000) is 10.3 times higher than the rate among white non-Hispanics (196 per 100,000). Although black, non-Hispanic persons comprise approximately 5% of Minnesota’s population, they account for 25% of reported chlamydia cases. Rates among Asian/Pacific Islanders (382 per 100,000), Hispanic, any race (900 per 100,000), and American Indian/ Alaska Natives (970 per 100,000) are 4.6 to 4.9 times higher than the rate among white, non-Hispanic persons. 

Chlamydia infections occur throughout the state, with the highest reported rates in Minneapolis (1,206 per 100,000) and St. Paul (894 per 100,000). All geographical areas around our state saw an increase in the rate of chlamydia between 2020 and 2021. Every county in Minnesota had at least 2 cases in 2021.

Chlamydia trachomatis infection is the most commonly reported infectious disease in Minnesota. In 2020, 21,942 chlamydia cases (414 per 100,000 population) were reported. This is a 11% decrease compared to 2019 (Table 3). 

Adolescents and young adults are at highest risk for acquiring a chlamydia infection (Table 4). The chlamydia rate is highest among 20 to 24-year-olds (2,253 per 100,000), followed by the 15 to 19-year-old age group (1,503 per 100,000). The incidence of chlamydia among adults 25 to 29 years of age (1,041 per 100,000) is considerably lower but has increased in recent years. The chlamydia rate among females (529 per 100,000) is nearly twice the rate among males (295 per 100,000), most likely due to more frequent screening among females. 

Chlamydia infection incidence is highest in communities of color (Table 4). The rate among black non-Hispanics (1,999 per 100,000) is 10.5 times higher than the rate among white non-Hispanics (191 per 100,000). Although black, non-Hispanic persons comprise approximately 5% of Minnesota’s population, they account for 25% of reported chlamydia cases. Rates among Asian/Pacific Islanders (328 per 100,000), Hispanic, any race (750 per 100,000), and American Indian/Alaska Natives (906 per 100,000) are over 3.9 to 4.7 times higher than the rate among white, non-Hispanic persons. 

Chlamydia infections occur throughout the state, with the highest reported rates in Minneapolis (1,144 per 100,000) and St. Paul (876 per 100,000). All geographical areas around our state saw a decrease in the rate of chlamydia between 2019 and 2020. Every county in Minnesota had at least 2 cases in 2020.

Chlamydia trachomatis infection is the most commonly reported infectious disease in Minnesota. In 2019, 24,535 chlamydia cases (463 per 100,000 population) were reported. This is a 4% increase compared to 2018 (Table 3).

Adolescents and young adults are at highest risk for acquiring a chlamydia infection (Table 4). The chlamydia rate is highest among 20 to 24-year-olds (2,467 per 100,000), followed by the 15 to 19-year-old age group (1,696 per 100,000). The incidence of chlamydia among adults 25 to 29 years of age (1,180 per 100,000) is considerably lower but has increased in recent years. The chlamydia rate among females (584 per 100,000) is nearly twice the rate among males (338 per 100,000), most likely due to more frequent screening among females.

Chlamydia infection incidence is highest in communities of color (Table 4). The rate among black non-Hispanics (2,092 per 100,000) is 9.7 times higher than the rate among white non- Hispanics (216 per 100,000). Although black, non-Hispanic persons comprise approximately 5% of Minnesota’s population, they account for 24% of reported chlamydia cases. Rates among Asian/Pacific Islanders (420 per 100,000), Hispanic, any race (897 per 100,000), and American Indian/Alaskan Natives (1,025 per 100,000) are over 2 to 6 times higher than the rate among white, non-Hispanic persons.

Chlamydia infections occur throughout the state, with the highest reported rates in Minneapolis (1,321 per 100,000) and St. Paul (1007 per 100,000). Suburban Minnesota had the greatest increase in rates between 2018 and 2019 at 6%. Every county in Minnesota had at least 2 cases in 2019.

Chlamydia trachomatis infection is the most commonly reported infectious disease in Minnesota. In 2018, 23,564 chlamydia cases (444 per 100,000 population) were reported. This is the same rate as in 2017 (Table 3).

Adolescents and young adults are at highest risk for acquiring a chlamydia infection (Table 4). The chlamydia rate is highest among 20 to 24-year-olds (2,385 per 100,000), followed by the 15 to 19-year-old age group (1,624 per 100,000). The incidence of chlamydia among adults 25 to 29 years of age (1,155 per 100,000) is considerably lower but has increased in recent years. The chlamydia rate among females (562 per 100,000) is nearly twice the rate among males (324 per 100,000), most likely due to more frequent screening among females.

Chlamydia infection incidence is highest in communities of color (Table 4). The rate among black non-Hispanics (2,025 per 100,000) is 9.7 times higher than the rate among white non-Hispanics (209 per 100,000). Although black, non-Hispanic persons comprise approximately 5% of Minnesota’s population, they account for 24% of reported chlamydia cases. Rates among Asian/Pacific Islanders (419 per 100,000), Hispanic, any race (751 per 100,000), and American Indian/ Alaska Natives (1,148 per 100,000) are over 2 to 6 times higher than the rate among white, non-Hispanic persons.

Chlamydia infections occur throughout the state, with the highest reported rates in Minneapolis (1,255 per 100,000) and St. Paul (982 per 100,000). Greater Minnesota had the greatest increase in rates between 2017 and 2018 at 5%. Every county in Minnesota had at least 4 cases in 2018.

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Last Updated: 08/15/2025