An extensive body of work shows that parental monitoring reduces the likelihood of risky behaviors among youth, yet little attention has been given to the factors compelling parents to engage in monitoring behaviors. The current study examines the association between non-familial, adolescent relationships (i.e., school connectedness, community connectedness, and peer relationships) and parental monitoring. The data used come from the Mobile Youth Survey (MYS), and from 2006 and 2011, resulting in a longitudinal sample of 3,287 adolescents. Longitudinal growth modeling reveals strong associations between non-familial relationships and parental monitoring, along with gendered effects across time. Implications for parental monitoring and delinquency in a low-income, Black American sample are discussed.