Any sexually active individual is at risk of trichomoniasis. There are estimated to be 3.7 million infected individuals in the United States, with higher rates among females aged 14-59 years (2.1%) compared to males (0.5%). Trichomoniasis prevalence is significantly higher among African American females (9.6-13%), compared to Hispanic (1.4%) and non-Hispanic white females (0.8-1.8%).
Factors that are associated with a higher prevalence of trichomoniasis infection in the United States include increased poverty level, lower educational level, and unmarried status. There is also a particularly high prevalence among STD clinic patients (26% of symptomatic women and 6.5% asymptomatic women tested).