Ryan Caldwell (born 1 September 1984) is a former Irish rugby union footballer. He last played for Exeter Chiefs in the English Premiership. Caldwell joined Ulster on a development contract in 2003 following a successful spell in the province's academy. He joined Bath before the 2011–12 season where he played for three seasons. He made his full Ireland debut against The Barbarians on 27 May 2008 in an uncapped match at Kingsholm Stadium in Gloucester and received his first cap as a sub against Canada on 23 May 2009 in Vancouver.