Thor Harris (born February 7, 1965) is an artist, sculptor, musician, painter, carpenter and handyman. He was the percussionist for Swans (2010–2016). He has performed with Shearwater (2001–2010), Bill Callahan, The Angels of Light, Lisa Germano, Yonatan Gat, Gretchen Phillips, Devendra Banhart, Rebecca Cannon, Xiu Xiu, Flock of Dimes & Amanda Palmer, Whalesong, and the Grand Theft Orchestra. He has recorded at least six instrumental albums with the Austin producer Rob Halverson. He also contributed to Ben Frost's 2014 album, Aurora. He joined the touring lineup of Xiu Xiu as a percussionist in February 2017 and he has enjoyed touring with Thor & Friends since 2015.

In the early 21st century, Harris wrote a short outline on "How To Tour In A Band Or Whatever". This set of '21 rules' spread widely across the internet. Harris also wrote and illustrated the 'zine/pamphlet, Ocean of Despair, about depression, as a companion to his recorded album of the same title.