Ijuí is a Brazilian municipality of Rio Grande do Sul, situated 395 kilometres from the state capital, Porto Alegre. In 2020 its population …Ijuí is a Brazilian municipality of Rio Grande do Sul, situated 395 kilometres from the state capital, Porto Alegre. In 2020 its population was 83,764, making it the third most populous city of the Missões region, behind Passo Fundo and Erechim.