Mass media coverage of government is often blamed for inciting anti-public sector sentiment. Yet there have been few empirical assessments of these claims. To address this gap in the literature, this study examines whether relationships between citizens’ expectations of public sector performance, satisfaction with public services, and levels of trust in government vary according to their use of online mass media for information about government. Using data collected in 2012 from a survey of 1,100 Seoul citizens, we find that greater use of online mass media to obtain information about government reinforces negative relationships between (1) expectations of public sector performance and satisfaction with public services, and (2) expectations of public sector performance and trust in government. Moreover, the size and strength of the negative indirect relationship between expectations of public sector performance and trust in government increase as respondents use online mass media more frequently for information about government.