There are hints, that online-gambling has a higher addictive potential than offline-gambling. In this study prevalence and sociodemographic distribution of online- vs. offline-gambling in Austria are gathered and possible relations discussed. Problematic gambling-behavior was assessed via Lie-and-Bet questionnaire from Johnson. The results indicate a tendency of younger gamblers and particularly problematic gamblers towards online-gambling. Considering the substantial addictive potential of online-gambling and hints of a future trend away from offline- towards online-gambling, preventive measures like public restrictions for online providers and awareness campaigns for consumers about the dangers of online-gambling offers are reasonable.