Nathan Frederick Cayless (born 28 March 1978) is a former New Zealand international rugby league footballer who was a long-time captain of the Parramatta Eels in the National Rugby League.
His position of choice was prop forward.
He is also a former captain of the New Zealand national team, whom he led to World Cup glory against Australia in 2008.
Cayless was the head coach of Intrust Super Premiership NSW side The Wentworthville Magpies from 2016 to 2018.