Arroio do Tigre is a municipality in the state of Rio Grande do Sul, Brazil.

The municipality is partly flooded by the reservoir of the Dona Francisca Hydroelectric Plant on the upper Jacuí River.

In 1920 it began to be known as Vila Tigre, and found its first commercial buildings, Catholic and Evangelical churches, and later, the Hospital Santa Rosa de Lima and Colégio Sagrado Coração de Jesus.

In 1920 an agricultural cooperative, Cooperativa Agrícola Mista Linha Cereja (COMACEL), was founded, which is still active.

This geographical article relating to Rio Grande do Sul is a stub.