Digital citizenship behaviour is the appropriate behaviour when engaging the digital technology ethically, responsibly, and safely by individuals. This study intends to investigate college students' digital citizenship behaviour based on background variables during the COVID-19 pandemic in Tamilnadu among the college students who chose different programmes from diploma to doctoral degree level. The Digital Citizenship Questionnaire by Nordin et al (2016) was used to collect data on digital citizenship behaviour of college students. With the help of snowball techniques, 304 online survey responses were obtained. The data was examined using percentages, mean, standard deviation, t-tests, and F-tests, and at 5% significance for table values the hypotheses were tested. Findings show (i) college students in Tamilnadu have a moderately high level of digital citizenship; (ii) gender, marital status, mode of study, type of college, and internet use hours significantly affect digital citizenship behaviour; and (iii) location, age group, level of study programme, and nature of college do not significantly affect the digital citizenship behaviour of the college students.