Just over 685,000 children made more than one million visits to EDs in Ontario in 2005–2006. Newborns and babies up to one year of age had the highest proportion of ED visits (802 per 1,000 children). This high visit rate reflects that 42.6% of newborns and babies up to one year of age came to the ED more than once in the year. The lowest rate of ED visits—279 per 1,000—was for children aged 10 to 14 years.