Eugênio de Castro is a municipality of the northern part of the state of Rio Grande do Sul, Brazil. The population is 2,352 (2020 est.) in an area of 419.32 km².^[2] It is located 435 km west of the state capital of Porto Alegre, northeast of Alegrete.

• Entre-Ijuís
• Coronel Barros
• Augusto Pestana
• Jóia
• São Miguel das Missões

• List of municipalities in Rio Grande do Sul

• http://www.citybrazil.com.br/rs/eugeniodecastro/^{[permanent dead link‍]} (in Portuguese)