In recent discussion there has been concern over mental health issues of adolescents, especially among customers of child welfare. Mental health services should have their focus on early interventions and basis as out-patient care near home. The on-going national reform of social and health care requires also empirical data of services at all levels. The aim of this study was to describe mental health services for adolescents in the Uusimaa region in the year 2014. All services were mapped with an adolescent-compatible modification of the ESMS-R. Services were explored by quantity and diversity, personnel resources of out-patient care and child welfare customers’ access to using mental health services. Risk factors and diversity of mental health services correlated with the size of the municipality. Personnel resources in out-patient care or outpatient-ratio did not associate with population or child welfare customers. There was also a shortage of day care and home-based services. The differences in personnel resources and their out-patient ratios mean that the service users are in unequal positions. This might be a consequence of the absent benchmark information and hence dissimilar political decisions. In on-going social and health care reform process it is important that all adolescents should have equal access to mental health care.