Police and paramedics were called to a street near busy Mandurah Forum after reports someone was injured on Wednesday.
It’s understood emergency services arrived to find a body on the side of a footpath along Owen Street about 5:19am.
Police closed the road for a short time until the scene was cleared.
St John Ambulance were also at the scene, however, they do not transport those who are declared deceased on site.
It’s understood the death is not being treated as suspicious.