Juan Bautista Borja (born 3 February 1970) is a former Grand Prix motorcycle road racer from Spain.

Having won the FCIM 125cc European championship in 1992, he first raced on the world stage at the 1993 FIM motorcycle Grand Prix at the Circuito del Jarama, Madrid, but retired on lap 19 in the 250cc class riding a privateer Honda.

For 1994, he gained a series of one-off privateer rides in the 250cc class, starting with an Aprilia at the 1994 Australian motorcycle Grand Prix, and finishing the season on a Honda, placing him 30th in the championship.

He then spent two seasons on the ELF 500 ROC sponsored by Pepsi and then Shell, placing 14th in 1996 and 17th in 1997 on an under-developed and hence unreliable bike.

[1] In light of their sponsorship from Sterilgarda for the 2004 season, the DFX team choose Italian rider Marco Borciani.