Chlamydia   
Annual Summary of Reportable Diseases

• 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. 

In 2023, 21,779 chlamydia cases (380.9 per 100,000 population) were reported. This is a 1.3% decrease compared to 2022. 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. 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. 

• 2023 Data tables available in: Sexually Transmitted Infections & HIV

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. Adolescents and young adults are at highest risk for acquiring a chlamydia infection. 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. 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.

• For up to date information see: Chlamydia

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.

Adolescents and young adults are at highest risk for acquiring a chlamydia infection. The chlamydia rate is highest among 20 to 24-year-olds (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. 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.

• For up to date information see: Chlamydia

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. 

Adolescents and young adults are at highest risk for acquiring a chlamydia infection. 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. 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.

• For up to date information see: Chlamydia

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.

Adolescents and young adults are at highest risk for acquiring a chlamydia infection. 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. 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.

• Find up to date information at>> Chlamydia

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.

Adolescents and young adults are at highest risk for acquiring a chlamydia infection. 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. 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.

• For up to date information see>> Chlamydia

• Archive of Annual Summary of Communicable Diseases Reported to the Minnesota Department of Health
  Archive of past summaries (years prior to 2023 are available as PDFs).