The available evidence suggests that the foreign-born are not disproportionately involved in crime nor in victimization in Australia. There are reports that both foreign terrorist organizations and crime sydnicates use Australia as one of their bases, but there is no public evidence of this. There are some immigrant groups, however, disproportionately represented in crime statistics. These are immigrants from New Zealand, Germany, and Yugoslavia. It is clear that the second generation of immigrant families have higher crime rates than the first generation. Various crime-cause theories help explain this phenomenon, including the delinquent-generations hypothesis, the frustration-aggression hypothesis, and the culture conflict hypothesis. Any view of immigrant criminality based on official statistics must be a tentative one because of methodological limitations in data acquisition and the tendency of many ethnic groups to handle their own deviancy problems rather than report them to the authorities. 39 footnotes.