Little is known about ethnic differences in HIV-disclosure to sexual partners or the relationship between HIV-disclosure and sexual risk. Differences in HIV-disclosure rates between African-American and White men who have sex with men (MSM) were analyzed using data from the Treatment Advocacy Program. In general, the findings suggest that African-Americans are less likely than Whites to disclose their HIV status to sexual partners. The findings also suggest that the African-American participants who disclosed to HIV-negative partners were significantly less likely to engage in unprotected anal sex with HIV-negative partners and partners whose HIV status was unknown than those participants who did not disclosure to HIV-negative partners. Although HIV-disclosure appears to be an important factor to consider in HIV-prevention efforts, there are unique factors that influence HIV-disclosure decisions for African-American MSM. Interventions should consider these unique challenges before focusing on HIV-disclosure as a primary tool for reducing the transmission of HIV.