Despite the importance of promoting socially responsible citizenship in the Internet age, there is a paucity of research on how digital citizenship or digital citizens might be defined and/or investigated. This study found 4 major categories that construct digital citizenship: "Ethics," "Media and Information Literacy," "Participation/Engagement," and "Critical Resistance." Based on these comprehensive and interconnected categories of digital citizenship, the author argues that digital citizenship needs to be understood as a multidimensional and complex concept in connection with an interrelated but non-linear relationship with offline (place-based) civic lives.