Martin Tielli (born 28 February 1967, Italy) is a Canadian singer-songwriter. He was a member of the Rheostatics, and has also released material as a solo artist and with the side project Nick Buzz. As well, he has appeared as a guest musician on albums by Barenaked Ladies, Kevin Hearn, The Waltons, Jane Siberry, Ashley MacIsaac, Meryn Cadell and Mia Sheard. He is also a painter, and created most of the album covers for the Rheostatics.
Tielli's younger brothers are Doug Tielli and John Tielli. They were members of the band People From Earth. Martin co-produced People From Earth's 1997 album, Luvskull, with the band and Don Kerr.