What Duolingo score do you need for Rivier University?

Scores are official only when sent directly to Rivier University or when Rivier can verify them electronically. The page gives no Duolingo validity period or subscore rule.

For comparison, the same page sets IELTS at 5.5, per Rivier University.

You may not need a test if you hold a US high school, college or university degree, completed two years of full-time study in a US degree programme, are a citizen of an Anglophone country, or completed English courses at a CEA-accredited institution.

Requirements vary by programme and change between admissions cycles. The score that binds you is the one on your Rivier programme page and in your offer letter, so check it there before you book a test.