Recent studies have suggested that day care may be a relatively unsafe environment. In this population-based study, the incidence of injuries in day care and home care were evaluated based on the number of hours children were exposed to each environment. In this population, 43.6% of children less than 5 years of age spent part of the year in day care. The rate of injuries in day care was 2.50 per 100,000 child-hours of exposure compared with a rate of 4.88 per 100,000 child-hours of exposure in the home environment. There were no differences in overall severity of injuries in the two groups. It was concluded that children are at no greater risk of injury in day-care settings than in the home environment.