The aim of this study was to compare levels of dental care utilization, receipt of dental services, and oral hygiene habits between a sample of individuals with Down syndrome (DS) and their siblings. Data were collected by means of a recently validated, French‐language, questionnaire measured of oral health and its related problems for individuals with DS. A cross‐sectional survey was undertaken of parents of children with DS attending a national meeting for families and carers of individuals with DS in France. Older individuals with DS were significantly more likely to visit a dentist regularly than their older non‐DS siblings, but the group with DS was significantly less likely to have received any dental treatment. The group with DS was significantly more likely to have difficulty finding both medical and dental services. Parents were nearly twice as likely to report problems finding dental services for their child with DS as they were medical services. In a multiple logistic regression analysis within the DS group, it was found that older age, regular speech therapy and ophthalmology consultations, and reports of no difficulty finding a dentist were independently associated with increased odds for regular dental consultations. Analysis of the findings suggests that the parents of children with DS in France frequently encounter problems of access to oral health care and that individuals with DS are less likely to receive dental services than are their non‐DS siblings.