Bom Retiro, Santa Catarina is a municipality in the state of Santa Catarina in the South region of Brazil. As of the 2020 estimate, Bom Retiro had a population of 10,060.
Bom Retiro was discovered on 12 April 1791, and it became a municipality on 4 October 1922.
According to the Köppen climate classification, Bom Retiro has an oceanic climate (Köppen: Cfb), the annual temperature on summer is 24ðC, and the average temperature on winter are 18ðC.