Several authors have shown that gamblers are more involved in delinquency than nongamblers and that there is an association between the severity of gambling and delinquency. However, current knowledge is limited regarding this relationship among adolescents, especially among young girls. Furthermore, these studies reveal very little regarding the types of offences committed by young male and female gamblers according to their gambling profiles. As part of a study on Internet gambling, 1870 students in secondary 3, 4 and 5 were recruited in schools from three Quebec regions. The DSMIVMR-J (Fisher, 2000) and MASPAQ (Le Blanc, 2010) instruments were used to measure the youths’ gambling habits and deviant behaviours. The objective of this article is to : 1 – draw a portrait of the gambling habits of the girls and boys in the sample ; and 2 – examine the relationships between gambling severity, Internet gambling and deviant behaviours, separately according to the gender of the youths in the sample. The main results show that gambling severity is linked to both clandestine and manifest deviant behaviours among male and female gamblers alike. Internet gambling among male and female gamblers is associated with a higher severity score for some clandestine and manifest deviant behaviours.