Mónica Castaño Agudelo (born 5 June 1989)[2] is a Colombian beauty queen and model.

Castaño was selected to be one of the final fifteen contestants of the first cycle of Colombia's Next Top Model.

Castaño represented Pradera at the Señorita Valle 2011 pageant, where she was the virreina.

[6] In October 2014, she represented Colombia at the Miss Grand International 2014 pageant in Bangkok, where she finished as the fourth-runner-up to Daryanne Lees of Cuba.

[7] In the Miss Supranational 2015 pageant, she finished as the second runner-up to Stephania Stegman of Paraguay.