Ronaldinho (Ronaldo de Assis Moreira; born 1980) is a Brazilian football player.
Ronaldinho, a diminutive form of the given name "Ronaldo", often used as a term of endearment, may also refer to:
Ronaldo (Brazilian footballer) (Ronaldo Luís Nazário de Lima; born 1976), Brazilian football striker and businessman Ronaldinho Gomes (born 1979), Santomean footballer
See also Ronaldo (disambiguation)