Adolescents and young adults are disproportionately affected by sexually transmitted diseases (STDs). This study examined the association of "GYT: Get Yourself Tested" (GYT), a sexual health social marketing campaign, with several sexual health behaviors on a nationally representative sample of high school (HS) and college students (n = 2,329) recruited through an online panel survey. Behaviors examined were STD testing, HIV testing, and whether students had communication with health care providers and their romantic partners about STDs and STD testing. Rao-Scott chi-square tests and multivariable logistic regression models were conducted. The results indicated college students were more aware of GYT than HS students. Awareness of GYT was significantly associated with STD testing (p < 0.05), HIV testing (p < 0.01), and talking with romantic partners (p < 0.01) for college students but only with STD testing (p < 0.05) and talking to a provider (p < 0.05) for HS students. The differences between HS and college students provide insight for those developing and implementing interventions across such a broad age range of youth.