Rug or RUG may refer to:

• Carpet or rug, a textile floor covering
• Rug (animal covering), a covering or garment to protect domesticated animals
• Really Useful Group, a company set up by Andrew Lloyd Webber
• Ghent University (Rijksunversiteit Gent)
• University of Groningen, (Rijksuniversiteit Groningen)
• Rugby railway station (National Rail code)

Rhug (normally Y Rug in Welsh; sometimes given the antiquarian spelling Rûg) is a township in the parish of Corwen, Denbighshire, Wales, formerly in the old cantref of Edeirnion and later a part of Merionethshire, two miles from Corwen and ten miles north east of Bala. It includes the hamlet of Bonwen. It is situated near the River Dee, under Berwyn range. About 1150, it was ruled by the Maer Du or "Black Mayor of Rhug" and later became part of the lands of the barons of Edeirnion (see Hughes of Gwerclas) who ruled from Gwerclas Castle.