Catalina Castaño Álvarez (American Spanish: [kata'lina kas'ta?o 'alßares]; born 7 July 1979) is a retired tennis player from Colombia.
Her highest singles WTA ranking of 35 she achieved in 2006.
In her career, she won ten titles on the ITF Women's Circuit, six in singles, as well as one doubles title on tournaments of the WTA 125K series.
Castano has defeated top 20 players such as Nicole Vaidišová, Anna-Lena Grönefeld, Patty Schnyder, Paola Suárez, Li Na and Lucie Šafárová.
She was coached by Peruvian-born British citizen Pablo Giacopelli since 2004.