Adédayọ̀ is both a surname and a given name of Yoruba origin, meaning "the crown or royalty became joyful". Notable people with the name include:
Adelayo Adedayo (born 1988), British actress Adedayo Adebayo (born 1970), Nigerian rugby union player Adedayo Clement Adeyeye (born 1957), Nigerian politician Adedayo Omolafe (1964–2021), Nigerian politician