Patrick Duignan (born May 1, 1972 in Canada) is a former rugby footballer, an Irish representative three-quarter who played in two pool matches of the 1998 Rugby World Cup.
Born in Canada and raised in Australia, Duignan has twice played internationally for Ireland. He made five appearances in the Celtic League in 2001-2002 for Connacht.
In 2003 and 2004 in Australia he coached 1st Grade at NSW suburban 2nd division club Petersham. He also made some appearances as a player-coach in his time at the club. Pat was known as "Two Caps" at Petersham for his two Irish internationals.
Following his involvememt with Petersham he was General Manager at Randwick Rugby Club in 2005-06.