The Olympic Aquatics Stadium was a temporary aquatics center in the Barra Olympic Park in Rio de Janeiro. The venue hosted the swimming events, Synchronized swimming finals and water polo finals at the 2016 Summer Olympics, and the para-swimming events for the 2016 Summer Paralympics.

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.