Partner notification (PN) is an essential element of local and state-level HIV/STI prevention and control programs. The current study quantitatively assessed the psychosocial and behavioral predictors of PN use among men who have sex with men (MSM) (n = 189) using multivariable logistic regression procedures. STI history or being HIV-infected were significant predictors of having notified past sexual partners of HIV/STI exposure; engaging in unprotected insertive anal sex and using poppers during sex in the 12 months prior to enrollment resulted in greater odds of PN. Symptoms of social anxiety and having a drinking problem were significant predictors of future willingness to use state department of public health PN services. Efforts to increase PN acceptability should focus on HIV-uninfected MSM, particularly those with STI history. Results suggest how to increase acceptability and use of PN as a public health strategy and underscore the need for counseling as part of the notification process.