Roderick (Rory) Macdonald (born 26 July 1949, Dornoch, Sutherland, Scotland.) is the bassist of the Scottish Celtic rock band Runrig, as well as their primary songwriter with his younger brother, Calum Macdonald. Rory tends to write the melody, and Calum the lyrics. Since former lead singer Donnie Munro left the band in 1997, Rory has taken lead vocal duties on songs in the band's catalogue written in the Scots Gaelic language, as the band's new lead singer, Bruce Guthro, is not a Gaelic speaker.

In the mid to the late sixties, Rory was a part of a band called The Skyvers.

Rory previously attended the Glasgow School of Art and had a promising career as a graphic designer until Runrig went 'professional'. Later putting these skills into practise, he designed the sleeve notes for Runrig's Recovery and Heartland albums.