Oroz was involved with Spanish national age-group teams at several levels and with much success, being a member of the under-17 squad that claimed the bronze medal at the 2013 UEFA Women's Under-17 Championship, silver at the 2014 FIFA U-17 Women's World Cup and gold at the 2015 UEFA Women's Under-17 Championship; the under-19 squad which reached the final of the 2016 UEFA Women's Under-19 Championship then won the 2017 tournament; and the under-20 squad who were runners-up at the 2018 FIFA U-20 Women's World Cup, having also been involved in the 2016 edition.