About 78 thousand people.

Rivera sits right on the border with Brazil, so closely joined to the Brazilian city of Livramento that a single street separates the two countries. It is a lively place where two languages and cultures blend together.
You can put one foot in Uruguay and one in Brazil at the shared plaza, shop in the busy stores, and hear people speaking a fun mix of Spanish and Portuguese. The green hills around town are pretty for a stroll.
A shared open plaza lets you stand in Uruguay and Brazil at the same time, which is a very cool thing to do.
People here blend Spanish and Portuguese into a friendly local way of talking called portunol.