This dataset includes data from the published article "Measuring the Callous-unemotional Traits in Spanish Juvenile Offenders: Properties and Functioning of the INCA Questionnaire in This Population", published in the journal Psychiatry, Psychology and Law (http://dx.doi.org/10.1080/13218719.2025.2497785). More especifically it includes data about 202 Spanish young offenders (82.2% male) from Tarragona (Spain), with ages between 14 and 19 years old. This sample of young offenders was recruited from open intervention programs in the province of Tarragona (Catalonia, Spain). These programs are measures of criminal responsibility that are carried out in the social and family environment of the young person, so they do not involve deprivation of liberty. The data includes their ages, gender, socioeconomic level, kind of offence commited and responses to the Inventory of Callous-unemotional traits and Antisocial behaviour (INCA questionnaire). It also includes their scores for the questionnaire of aggression I-DAQ and for the questionnaire of impulsivity BIS-11c.