Vinoj Suranjaya De Silva Muthumuni also simply known as Vinoj De Silva or Vinoj Suranjaya (born 9 January 1995) is a Sri Lankan track and field athlete and a national record holder in men's 200m.
He made his South Asian Games debut representing Sri Lanka at the 2016 South Asian Games and claimed two gold medals in 200m and 4×100m relay events. In 2018 during the national trials for the 2018 Asian Games, he broke the 200m national record after 20 years which was held by former athlete Sugath Thilakaratne, clocking 20.68 seconds. He also represented Sri Lanka at the 2018 Commonwealth Games.
Vinoj also claimed silver in men's 200m event and was also part of the team which claimed new South Asian Games record for the men's 4×100m relay event on 6 December 2019 during the 2019 South Asian Games.