Objective To elucidate the prevalence of illnesses and healthcare utilization processes among the general population, including infants, in rural Senegal.Methods We selected 29 households from a farming village V1 and 21 households from a fishing village V2 by systematic random sampling. Using a survey questionnaire, face to face interviews were conducted to assess illnesses experienced during the past 3 months and type of treatment chosen. Healthcare utilization processes were visually summarized in tree diagrams. Prevalence was calculated separately by age group and illness.Results The number of valid respondents was 182 in V1 and 128 in V2. In V1 and V2, the total number of illnesses experienced across all respondents was 254 and 198, with a prevalence of 1.4 and 1.5, respectively. The most common first and second healthcare utilization behaviors in V1 were using a Western style dispensary n 146 57 and again using the dispensary n 36 46 , and in V2 were using Western over the counter drugs n 59 29 and using a health post where nationally qualified nurses are available n 16 42 .Conclusions Although there was little difference in prevalence between the two villages, they differed in terms of illness structure and prevalence by age group, suggesting the need for health and medical care measures that take into account locality and age. The study highlights a gradual transition in the healthcare utilization processes among residents from primary to specialized medical care.