This study aimed to examine in a sample of college-age heterosexual couples the relations between (a) relationship and sexual satisfaction and (b) sexual and nonsexual communication. The authors tested a mediation model whereby couples relationship satisfaction was hypothesized to predict couples sexual satisfaction by way of sexual and nonsexual communication levels. Participants were 266 individuals (133 couples) who completed measures of satisfaction and communication independently of their partner. A mediation model, tested with structural equation modeling, showed the degree to which couples were relationally satisfied was positively related to their level of sexual and nonsexual communication, which, in turn, was positively associated with their degree of sexual satisfaction. Results indicate that levels of sexual and nonsexual communication among couples affect the link between relationship and sexual satisfaction. Such findings may have important implications for college-age couples in committed relationships who are looking to improve satisfaction as well as for therapists, counselors, and educators who work with these couples to improve relationship and/or sexual satisfaction.