P. Niroshan Wijekoon is a retired male badminton player from Sri Lanka.
Wijekoon competed in badminton at the 1992 Summer Olympics in men's singles. He lost in the first round to Hannes Fuchs, of Austria, 15-9, 15-11. In his home country he won several national championships. He also participated the World Badminton Championships in 1989 in the men's singles losing to Kim Hak-kyun of South Korea 7:15 and 7:15. In his home country, he won nine titles in the men's singles at the Sri Lankan National Badminton Championships between 1983 and 1992.