Óscar Osvaldo Aguirregaray Acosta (born 25 October 1959, in Montevideo) is a former Uruguayan soccer player who played for Nacional, Defensor Sporting, Internacional de Porto Alegre, Palmeiras, Figueirense and Peñarol.
In 2006, he was head coach of Club Atlético River Plate in Uruguay alongside Pablo Bengoechea.