Summary: Immigrants and their descendants in Denmark are overrepresented among those convicted under the criminal code. In 2022, immigrants/descendants accounted for 29.7% of convicted offenders, but only 15.2% of the population aged 15-79, meaning that the conviction rate among them was about 2.4 times higher than among those born in Denmark. Immigrants/natives are over-represented in all types of crime, with the highest over-representation in murder/attempted murder, robbery and rape. Non-natives are significantly over-represented in Danish prisons, especially in Copenhagen prisons, despite being a minority of the population. Immigrants from Western countries and their descendants have conviction rates similar to those of Danes. Immigrants from non-Western countries, and especially their descendants, have much higher conviction rates than Danes. For men born in 1996 before the age of 24, more than 1 in 4 male non-Western immigrants/descendants had a conviction under the criminal code, compared to less than 1 in 10 men of Danish origin. The highest per capita conviction rate is concentrated among groups originating from the MENAPT region, while non-Western groups from outside the MENAPT region are only moderately overrepresented in the aggregate. Broken down by specific country of origin, several African and Middle Eastern groups have violent crime conviction rates 5-10 times higher than rates for those of Danish descent. In the 1985-1987 cohorts of men from some high-crime countries, the majority (>50%) had a conviction under the criminal code before age 30, compared with 18% of men of Danish descent. In later cohorts, the absolute level of convictions has declined somewhat, but the relative differences between groups have not changed much. These differences are not due to age structure or gender differences, as the rates for standard-age men continue to show a significant overrepresentation of descendants of non-Western European origin, especially for serious crimes. After adjusting for age and family income, the conviction rate among descendants of non-Western European men is still about 2.2 times higher than the rate for those of Danish descent, and the large differences between countries of origin continue into the second generation as well. The article argues that the remaining differences need to be explained based on pre-migration group characteristics that persist across generations (cultural and/or genetic transmission), and cites evidence from Scandinavian countries that the same groups tend to perform above average or below average in different destination countries.