According to reports, the actor's body was discovered last week on 14 August. The cause of death is currently unknown.
"Police attended Minyon Falls, Whian Whian, responding to a concern for welfare," the NSW police statement read.
"The body of a 41-year-old man was located. The death has not been treated as suspicious."
Unwin played Jesse McGregor on Home and Away from 1996-2000 and then 2002-2005. In 1997 he was nominated for a British National Television award for his "outstanding performance as a newcomer" to the industry.
After leaving the popular TV soap he reportedly studied law and worked as a solicitor.
His former co-star Ada Nicodemou paid tribute to Unwin in a statement to Yahoo News, commenting: "I just woke up to the tragic news of Ben's passing, my heart goes out to his family."
Her character Leah Patterson-Baker had a brief romance with Unwin's character on the show.