Carlos Longo Esteban[a] (born 5 February 1982 in Huelva, Andalusia) is a badminton player from Spain.

[1] He won his first senior title at the National Championships in 2004 partnered with Rafael Fernández.

[2] A year later, he played at the 2005 World Badminton Championships in Anaheim, United States.

[3] He also played the 2006 World Championships in men's singles, and he was defeated in first round by Roman Spitko of Germany.

[4] Longo also won the mixed doubles title at the National Championships in 2009 and 2010 with Haideé Ojeda.