Marquinhos or Marquinho is a diminutive name of Marcos or Marcus, may refer to:
- Marquinhos
- Marcus Alfredo de Araújo (born 1972), Brazilian footballer
- Marcos Antônio da Silva Gonçalves (born 1989), Brazilian footballer
- Marcos Antônio Malachias Júnior (born 1982), Brazilian-born Bulgarian footballer
- Marcos Aurélio Lima Barros (born 1982), Brazilian footballer
- Marcos Corrêa dos Santos (born 1971), Brazilian footballer
- Marcos Gomes de Araujo (born 1976), Brazilian footballer
- Marcos José Franklin Macena de Melo (born 1977), Brazilian footballer
- Marcos Antônio Abdalla Leite (born 1952), Brazilian basketball player
- Marcos Roberto da Silva Barbosa (born 1982), Brazilian footballer
- Marcos Vicente dos Santos (born 1979), Brazilian footballer
- Marcus Vinicius Vieira de Souza, Brazilian basketball player
- Weimar Marcos Rodrigues, (born 1984), Brazilian footballer
- Marquinhos Paraná, real name Antônio Marcos da Silva Filho, (born 1977), Brazilian footballer
- Marcos Aoás Corrêa (born 1994), Brazilian footballer
- Marquinho
- Marcus Vinicius da Cruz Alves Nóbrega (born 1979), Brazilian footballer
- Marco Aurélio Pereira Alves (born 1982), Brazilian footballer
- Marco Antônio de Mattos Filho (born 1986), Brazilian footballer
- Other
- Marquinho, Paraná, a location in Brazil (see List of municipalities in Paraná)