Vacaria is a municipality in the northeast of the southern Brazilian state of Rio Grande do Sul.
It is located at a latitude of 28° 30' 44" South and a longitude of 50° 56' 02" west, with an altitude of 971 meters. Its population in 2020 was estimated to be 66,575 inhabitants. The total area of the city is 2105.6 km². The city is known in Brazil for its climate and its production of apples.
Its Catedral Nossa Senhora da Oliveira is the episcopal see of the Roman Catholic Diocese of Vacaria, which was founded in 1937 as a territorial prelature.