Oswaldo (Spanish for "Oswald") is a Spanish masculine given name.
It may refer to:
Carlos Oswaldo Fernández (born 1984), Peruvian footballer
Oswaldo Castillo, Nicaraguan-American gardener/construction worker-turned-actor
Oswaldo Cruz (1872–1917), Brazilian physician, bacteriologist, epidemiologist and public health officer
Oswaldo Cruz Filho, Brazilian chess master
Oswaldo de la Cruz, Peruvian politician and a Congressman
Oswaldo de Oliveira (born 1950), Brazilian football manager
Oswaldo de Rivero (born 1936), Peruvian career diplomat
Oswaldo Frota-Pessoa (1917–2010), Brazilian physician, biologist and geneticist
Oswaldo Goeldi (1895–1961), Brazilian artist and engraver
Oswaldo Guayasamín (1919–1999), Quechua Indian and Ecuadorian painter and sculptor
Oswaldo Handro (1908–1986), Brazilian botanist, specialist in pteridophytes and spermatophytes
Oswaldo Henríquez (born 1989), Colombian football defender
Oswaldo Ibarra (born 1969), Ecuadorian football player and goalkeeper
Oswaldo López Arellano (1921–2010), President of Honduras, 1963–1971, 1972–1975
Oswaldo Louzada (1912–2008), Brazilian actor
Oswaldo Luizar (born 1962), Peruvian politician
Oswaldo Mairena (born 1975), baseball player
Oswaldo Minda (born 1983), Ecuadorian footballer
Oswaldo Moncayo (1923–1984), Ecuadorian painter
Oswaldo Navarro (born 1984), Venezuelan baseball player
Oswaldo Payá (born 1952), political activist and dissident in Cuba
Oswaldo Peraza (born 1962), baseball player
Oswaldo Ramírez (born 1947), former Peruvian football striker
Oswaldo Sánchez (born 1973), Mexican international goalkeeper
Oswaldo Sosa (born 1985), Venezuelan baseball player
Oswaldo Viteri (born 1931), neo-figurative artist
Oswaldo Zambrana (born 1981), Bolivian chess master
Rubén Oswaldo Díaz (born 1946), former Argentine footballer