This study puts forward a comprehensive digital citizenship scale based on carefully calibrated, overarching, inclusive components of digital citizenship that can be used to measure abilities, perceptions, and levels of participation of young adults in Internet based community. A 26-item five-factor model was extracted using an Exploratory Factor Analysis, and then cross-validated through a Confirmatory Factor Analysis. The digital citizenship scale in this paper had good reliability and construct validity, evidenced by significant relationships with Internet self-efficacy and Internet anxiety scales. As a theoretically rigorous and well developed digital citizenship scale, this study will help understand individuals' perceptions of their abilities and trajectories as active and/or critical members of online communities as part of their everyday lives on local, national, and global levels.