Serrao or Serrão is an Italian and Portuguese surname respectively. Notable people with the surname include:
Alliny Serrão (born 1985), Brazilian politician Carlos Serrao, American photographer Francis Serrao (born 1959), Indian Roman Catholic bishop Francisco Serrão (died 1521), Portuguese explorer Giovanni Andrea Serrao (1731–1799), Italian intellectual and churchman João Serrão (died 1521), Spanish navigator Joaquim Veríssimo Serrão (1925–2020), Portuguese historian José Carlos Serrão (born 1950), Brazilian football manager and former player Luella A. Varney Serrao (1865–1935), American sculptor Manuel Serrão, Portuguese nobleman Paolo Serrao (1830–1907), Italian composer Priya Serrao (born 1992), Australian lawyer, policy adviser, beauty pageant titleholder, and Miss Universe Australia 2019