Horizontina (Portuguese pronunciation: [oɾizõˈtʃĩnɐ]) is a municipality in Rio Grande do Sul, in southern Brazil, with 19,389 inhabitants in 2020.

The first settlers were German, Italian and Polish immigrants who arrived in the region in 1927.

A unit of US company John Deere is installed in Horizontina, generating about 80% of the city's tax revenue.

[4] The German dialect Riograndenser Hunsrückisch is the most-spoken German dialect in Brazil and as such an integral part of the history of many municipalities throughout the state of Rio Grande do Sul, including Horizontina.

In 2012 the Legislative Assembly voted unanimously in favor of official recognition of Riograndenser Hunsrückisch as a piece of cultural heritage to be preserved and protected.