Little is known about the use of psychotherapy to treat common mental disorders in a major city in a middle-income country. Our data come from in-home interviews with a stratified random sample of 2000 community residents aged 18 to 65 years in the city of São Paulo, Brazil. The information obtained included sociodemographic characteristics; psychotropic drugs; mental status; and lifetime, previous 12 months, and current use of psychotherapy. Logistic regression was used to examine determinants of use of psychotherapy. Of the sample, 22.7% met General Health Questionnaire-12 criteria for common mental disorders. Lifetime, previous 12 months, and current use of psychotherapy were reported by 14.6%, 4.6%, and 2.3% of the sample, respectively. Users typically were women, were more educated, had higher income, were not married, were unemployed, and had common mental disorders. Further analysis found that 47% (with higher education and income) paid out-of-pocket, and 53% used psychotropic medication. Psychotherapy does not seem to be the preferred treatment of common mental disorders.