These data are from a nationally representative, probability-based, and cross-sectional online survey that was taken by participants ages 8-18 in 2015. The goal was to present a big-picture look at the large trends and patterns of media usage among tweens (ages 8- to 12-years-old) and teenagers (ages 13- to 18-years-old) in the United States. Participants answered questions about media use, including the level of enjoyment, frequency of use, and amount of time devoted to a wide array of screen-based activities (watching TV shows, playing video games, and using social media) and non-screen-based media activities (reading and listening to music). For screen-based media activities, participants also answered questions about the devices they use (computers, smartphones, and tablets). Demographics include age, household income, parent education, race/ethnicity, gender, household size, and parent/caregiver employment status.