Nigel Seton Avery (born 31 August 1967) is a former weightlifting competitor for New Zealand. He was born in Auckland.
At the 1998 Commonwealth Games in Kuala Lumpur he won a bronze medal in the 105+ kg snatch and the 105+ kg combined total.
He went to the 2002 Commonwealth Games in Manchester where he 2 gold medals in the 105+ kg clean and jerk and 105+ kg combined total, and gained a silver medal in the 105+ kg snatch. He was the Closing Ceremony flag bearer for New Zealand.
He competed at the 2000 Olympic Games in Sydney placing 17th in the 105+ kg men.
From 1991 - 1996 he was a member of the New Zealand Bobsleigh team.
He has appeared on the TV One program Downsize Me! to show the effect of a high-fat diet on a very fit person.