Syphilis Statistics

Men account for the most cases of syphilis, with the vast majority of those cases occurring among gay, bisexual, and other men who have sex with men (MSM).

Most Recent Data

Primary and Secondary Syphilis — Distribution of Cases by Sex and Sex of Sex Partners, United States, 2019

Pie graph showing the distribution of primary and secondary syphilis cases by sex and sex of sex partners in the United States in 2019.

Image Source: STD Surveillance 2019