Robert Nathan Twaddle MNZM (born 21 August 1976) is a New Zealand former rower and Olympic medallist.

He competed at the 2008 Summer Olympics in Beijing, in the coxless pair rowing with his partner George Bridgewater and won a bronze medal.

[1] The pair began representing New Zealand together in 2004 and won bronze medals at the 2008 Summer Olympics in Beijing.

Twaddle crewed firstly for New Zealand at the World Championships in Milan Italy in 2003, qualifying for the Athens Olympics with pairs partner Robert Hellstrom.

In the 2009 New Year Honours, Twaddle was appointed a Member of the New Zealand Order of Merit, for services to rowing.