Judo at the 2016 Summer Olympics in Rio de Janeiro took place from 6 to 12 August at the Carioca Arena 2 inside the Barra Olympic Park in Barra da Tijuca. Around 386 judoka competed in 14 events.

The Barra Olympic Park, originally the City of Sports Complex, is a cluster of nine sporting venues in Barra da Tijuca, in the west zone of Rio de Janeiro, Brazil. The park, which served as the Olympic Park for the 2016 Summer Olympics and the 2016 Summer Paralympics, was originally built for the 2007 Pan American Games, consisting of three venues. The complex was later expanded to nine venues for the Olympics, two of which are temporary structures, and became the site of the Olympic Training Center.