Casimiro or Casemiro may refer to:
Given name Casemiro do Amaral (1892–1939), Brazilian footballer Casemiro Mior (born 1958), Brazilian football manager and former footballer Casimiro de Abreu (1839–1860), Brazilian poet, novelist and playwright Casimiro Alegre (1741–1825), Argentine militia officer and landowner Casimiro Asumu Nze (born 1975), Equatoguinean sprinter Casimiro Berenguer (1909–2000), Puerto Rican nationalist Casimiro Castro (1826–1889), Mexican painter and lithographer Casimiro Díaz (1693–1746), Spanish Augustinian friar Casimiro Gennari (1839–1914), Italian Catholic cardinal Casimiro Gómez Ortega (1741–1818), Spanish physician and botanist Casimiro Monteiro (1920–1993), Portuguese Goan assassin Casimiro Montenegro Filho (1904–2000), Brazilian army and air force officer Casimiro Olañeta (1795–1860), Bolivian politician Casimiro de Oliveira (1907–1970), Portuguese racing driver Casimiro Radice (1834–1908), Italian painter Casimiro Sainz (1853–1898), Spanish painter Casimiro Torres (1906-?), Chilean footballer Casimiro Ynares III (born 1973), Filipino politician Casimiro (streamer) (born 1993), Brazilian sports journalist and streamer
Surname Acácio Casimiro (born 1949), Portuguese footballer Augusto Casimiro (1889–1967), Portuguese journalist Bayani Casimiro (1918–1989), Filipino dancer Carlos Casimiro (born 1976), Dominican Republic baseball player Casemiro (Carlos Henrique Casimiro; born 1992), Brazilian footballer Didier Casimiro (born 1966), Russian businessman, a VP of Rosneft Fernando Casimiro (1931–2014), Portuguese sprinter Gisela Casimiro (born 1984), Portuguese writer and activist Henrique Casimiro (born 1986), Portuguese cyclist Isabel Casimiro, Mozambican sociologist Joaquim Casimiro (1808–1862), Portuguese composer and organist Julie Casimiro (born 1962), American politician Luis Casimiro, Spanish basketball coach Manuel Casimiro (born 1941), Portuguese painter