Marcelo is a given name, the Spanish and Portuguese form of Marcellus. The Italian version of the name is Marcello, differing in having an additional "l". Marcelo may refer to:

• Marcelo Costa de Andrade (born 1967), Brazilian serial killer, rapist, and necrophile
• Marcelinho Carioca (Marcelo Pereira Surcin born 1971 in RJ), Brazilian international midfielder in 1990s
• Marcelinho Machado (born 1975), Brazilian professional basketball player
• Marcelinho Paraíba (Marcelo dos Santos b. 1975 in Paraíba state), Brazilian international midfielder
• Marcelinho Paulista (Marcelo José de Souza born 1973 in SP state), Brazilian youth international in 1996 Olympics
• Marcelo (footballer, born January 1987), Brazilian footballer
• Marcelo (footballer, born May 1987), Brazilian footballer, who played for Lyon
• Marcelo (footballer, born 1988), Brazilian footballer, who played for Real Madrid
• Marcelo (footballer, born 1989), Brazilian footballer, who plays for Paços Ferreira
• Marcelo Arriagada (born 1973), Chilean road cyclist
• Marcelo Barovero (born 1984), Argentine football goalkeeper
• Marcelo Barticciotto (born 1967), Argentine-born Chilean former footballer and manager
• Marcelo Bordon (born 1976), Brazilian footballer
• Marcelo Cabo (born 1966), Brazilian football manager
• Marcello Caetano (1906–1980), Portuguese politician
• Marcelo Carrusca (born 1983), Argentine-Australian professional footballer
• Marcelo Cassaro (born 1970), Brazilian author of comics
• Marcelo Chamusca (born 1966), Brazilian professional football manager and former player
• Marcelo Chierighini (born 1991), Brazilian competitive swimmer
• Marcelo Cirino (born 1992), Brazilian footballer
• Marcelinho (footballer, born 1978) (born 1978 in Paraná state), Brazilian footballer
• Marcelo Del Debbio (born 1974), Brazilian architect and writer
• Marcelo Demoliner (born 1989), Brazilian tennis player
• Cello Dias, bass guitarist for American alternative rock band Against All Will
• Marcelo Díaz (born 1986), Chilean professional footballer
• Marcelo Djian (born 1966), Brazilian footballer of Armenian descent
• Marcelo (footballer, born 1969), Brazilian striker most famous for his time at Birmingham City
• Marcelo Fromer (1961–2001), guitarist of Brazilian rock band Titãs
• Marcelo Garraffo (born 1957), Argentine retired field hockey player
• Marcelinho (footballer, born 1990) (born 1990), Brazilian striker
• Marcelo Aguiar Quarterole (born 1978 RJ state), striker
• Marcelinho (footballer, born 1994) (AKA Marcelinho, born 1994), Brazilian footballer
• Marcelo José da Silva (born 1976), known as Marcelo Silva, Brazilian former footballer
• Marcelo Lipatín (born 1977), Uruguayan football (soccer) player
• Marcelo Melo (born 1983), Brazilian tennis player

Marcelo Diaz Brazilian jiujitsu competitor

• Marcelinho (footballer, born August 1984), Brazilian-born Bulgarian footballer
• Marcelo Negrão (born 1972), volleyball player from Brazil
• Marcelinho (footballer, born September 1984) (born 1984), Brazilian striker with A. Naval 1º de Maio
• Marcelo Pelé (born 1976), Brazilian striker
• Marcelo Ramos (footballer, born 1973), Brazilian former soccer player as a striker
• Marcelo Rebelo de Sousa (born 1946), current President of Portugal
• Marcelo Ríos (born 1975), Chilean former World No. 1 tennis player
• Marcelinho (footballer, born January 1987), Brazilian striker
• Marcelinho (footballer, born 1981), Brazilian midfielder for Botafogo
• Marcelo Signorelli (born 1963), Italian-Uruguayan professional basketball coach, book author and former player
• Marčelo (born 1983), Serbian hip-hop artist
• Marcelinho (footballer, born June 1987), Brazilian footballer playing for Indian Super League club Hyderabad
• Marcelo Diaz Brazilian jiujitsu competitor

• All pages with titles beginning with Marcelo
• All pages with titles beginning with Marcelinho