Koldo Gil Pérez (born 16 January 1978 in Burlata, Navarra) is a former Spanish professional road racing cyclist who last rode for the UCI Continental team Liberty Seguros Continental.

His career highlights include winning a stage of the Giro d'Italia and leading the overall classification at the Tour de Suisse.

At the 2006 Tour de Suisse, Gil took stage 6 and held the leader's yellow jersey until the final stage when he was overtaken by 2004 winner Jan Ullrich in the final stage's individual time trial.

After Gil was unable to find a team for the 2009 season, he announced his retirement.

This biographical article related to a Spanish cycling person born in the 1970s is a stub.