A random sample of 1298 non-medical mental health workers in West Berlin was asked to fill out a questionnaire concerning professional training, description of their working place, clients treated, financing, special professional qualifications and continuing education. An analysis was made of the distribution of therapists within the city. About half were engaged in intensive counselling only and the rest also practised psychotherapy. Results indicate that there are large differences in the rates per 100,000 inhabitants between the districts for all professional groups (e. g. medical doctors generally, psychiatrists, non-medical psychotherapists (total), medical psychotherapists in private practice, psychologists and social workers). In addition clear differences in the proportions of university and postuniversity training qualifications were found between districts. The same pattern of maldistribution was found for all therapists regardless of their theoretical background, and for major areas of work, for most service institutions and for the major diagnostic groups of clients treated. Highly significant correlations between socio-demographic variables of the twelve districts and therapist variables were found indicating that significantly more therapists and therapist with a higher degree of training are practising in the more affluent districts.