Viliamu Afatia (born 24 May 1990) is a samoan rugby union player. He plays prop for Samoa on international level. Afatia also plays for Agen in their Top 14 campaign.
Viliamu Afatia made his debut for Samoa coming off the bench against Tonga in the 2012 IRB Pacific Nations Cup. Afatia then was named in the Samoan squad for their 2012 end-of-year rugby union test matches against Canada, Wales and France.