Juan Carlos Loustau (born July 13, 1947) is a former Argentine association football referee.
He also officiated the memorable 1990 World Cup qualifying victory of the United States over Trinidad and Tobago, as well as El Maracanazo.
He was promoted in 1975 and was appointed assistant referee for the 1976 Argentine Primera División final between Boca Juniors and River Plate, where Rubén Suñé's "ghost goal" won Boca Juniors the match.
[1] In 2010, the International Federation of Football History & Statistics selected Loustau as the 12th best referee of the previous twenty-five years.
[2] This biographical article related to Argentine football is a stub.