Estebán Blanco Uhlenhaut (born 16 December 1981) is a Costa Rican former swimmer, who specialized in sprint freestyle events.

He achieved a FINA B-standard entry time of 23.87 from the Central American and Mexican Championships in his hometown San José.

[2][3] Swimming in heat three, Blanco powered past the entire field to a top seed in a new Costa Rican record of 23.72.

However, Blanco's blistering triumph was not enough to put him through to the semifinals, as he placed forty-fifth overall out of 80 swimmers in the prelims.

This biographical article related to a Costa Rican swimmer is a stub.