Richard Michael Duffy (born 30 August 1985) is a Welsh professional footballer who plays for Northern Premier League Division One South East club Kidsgrove Athletic.
A versatile player who can play either on the right or at the centre of defence, he won 13 caps for Wales between 2005 and 2008.
He is the younger brother of Robert Duffy.
He began his career at Swansea City, making his debut as a 16-year-old in December 2001, before winning a six-figure sum move to Premier League side Portsmouth in January 2004.
He never broke into the first team picture at Fratton Park, and instead enjoyed numerous loan moves at Burnley, Coventry City, and former club Swansea.
He switched to Millwall in February 2009, before signing with Exeter City in July 2009.
He joined Port Vale in July 2012, and helped the club to secure promotion out of League Two in 2012–13.
He stayed at the club for four years before joining Notts County via Eastleigh in June 2016.