A survey was conducted to assess the prevalence of intestinal parasitism in 65 native-born preschool and school-age children living in an unincorporated area of northern Florida. Fifty-seven percent of the children were found to be infected with intestinal parasites. Sixty-eight percent of males surveyed and 47% of females had either single or multiple infections. Prevalence was greatest in the five-10-year-old age group. For the total child population surveyed, parasitic infections in order of most to least prevalent were ascariasis (32%); giardiasis (29%); trichuriasis (14%); and hookworm (2%).