Ethnic disparities were found to be much higher among children with acute rheumatic fever than among children with GAS pharyngitis in a comparison of cases in Auckland during 2010–2016. Based on 1,257,058 throat swab samples, estimates of GAS pharyngitis occurred with similar incidence (≈19%) in children aged 5–14 years across ethnic groups. There were 792 hospitalisations for acute rheumatic fever during the same period with Māori and Pacific Island children at a higher risk than children of European/other ethnicity.