OBJECTIVE To analyze the use of health services in the Brazilian population by sociodemographic factors, according to data from the 2013 Brazilian National Health Survey. METHODS The study analyzed data from 205,000 Brazilian citizens in all age groups who participated in the Brazilian National Health Survey, a cross-sectional study carried out in 2013. Prevalence and confidence intervals were estimated for indicators related to access to and use of health services according to age group, level of education of head of household, and Brazilian macroregions. RESULTS Among individuals who sought health services in the two weeks prior to the survey, 95.3% (95%CI 94.9–95.8) received care in their first visit. Percentages were higher in the following groups: 60 years of age and over; head of household with complete tertiary education; living in the South and Southeast regions. In addition, 82.5% (95%CI 81.2–83.7) of individuals who received health care and prescriptions were able to obtain all the necessary medicines, 1/3 of them from SUS. Less than half the Brazilian population (44.4%; 95%CI 43.8–45.1) visited a dentist in the 12 months prior to the survey, with smaller percentages among the following groups: 60 years of age or older; head of household with no education or up to incomplete elementary; living in the North region of Brazil. CONCLUSIONS People living in the South and Southeast regions still have greater access to health services, as do those whose head of household has a higher level of education. The (re)formulation of health policies to reduce disparities should consider differences encountered between regions and social levels.