Sexual assault in the United States is prevalent. One out of every six American women has been the victim of an attempted rape or complete rape. Previous research demonstrates that hypermasculine attitudes are positively predictive of sexual aggression toward women. In these studies, researchers have continued to utilize outdated and inappropriate measures like the Hypermasculinity Inventory (1984) to assess hypermasculinity. Measures that assess hypermasculinity have only been validated on college samples. A modern measure of masculinity is the Auburn Differential Masculinity Inventory-23 (Burk, Burkhart, & Sikorski, 2004), which has been validated in college samples. The present research evaluated the psychometric properties of the Auburn Differential Masculinity Inventory (ADMI-23) with a non-college student sample using Prolific, an online platform for independent contractors to complete surveys. Participants were 377 individuals who self-identified as heterosexual males that were not enrolled in a college or university institution. Results showed that the four-factor model that underlies that ADMI-23 provided a good description of how the ADMI-23 items relate to each other. The non-college sample reported low levels of masculinity. Additionally, the observed scores from the ADMI-23 and its subscales demonstrated convergent and discriminant validity