The purpose of this study was to examine the connections between gambling behaviour and prevalence and types of criminal convictions. Data from a total of 3993 respondents were used. This dataset combined responses from the Finnish Gambling 2019 population survey and register-based data. The findings show that about 14% of respondents had one or more criminal convictions. Convictions were more common among men (22%) than women (6%). Age, gender, and social disadvantage were strongly linked to having convictions. Engaging in at-risk gambling and risky alcohol use were also linked to having convictions. Respondents who gambled to escape and those played electronic gaming machines were more likely to have multiple convictions in general and to have financial or property crime convictions.