Roy Gelmi (born 1 March 1995) is a Swiss footballer, who plays for FC Schaffhausen in the Swiss Challenge League.
On 2 January 2024, Gelmi signed with FC Vaduz. On 30 April, Vaduz announced that they would not extend his contract after the end of the season.
On 1 November 2024, he joined FC Schaffhausen until the end of the year.
Born in Switzerland, Gelmi is the son of a Dutch mother.