The goal of the present study was to examine developmental trajectories of online privacy concerns, as well as to identify predictive factors (e.g., cybervictimization, time spent online, and socializing online) related to online privacy concerns among early adolescents. Participants were 378 adolescents from the Lower Mainland of British Columbia, Canada who were in grade six and grade seven at wave 1 of the study (192 boys, M age = 13.93 years, SD = .72 year). Three years of longitudinal data on online privacy concerns, cybervictimization, and time spent online socializing were collected from self-report surveys. Results identified three different trajectories of online privacy concerns: decreasing (32.8%), increasing (44.98%), and stable (22.29%). Adolescents who reported higher scores on cyber victimization were more likely to be in the decreasing online privacy. Adolescents who spent more time socializing online were more likely to be in the stable or increasing subgroup. These findings highlight the important value of studying subgroups regarding the development course of online privacy concerns.