Gregory James Tansey (born 21 November 1988) is an English professional footballer who plays for Scottish Premiership side Aberdeen as a midfielder.

Tansey started his career at Stockport County, progressing through the youth system before making his first-team debut in 2006. He was loaned out to Conference National side Altrincham towards the latter stages of the 2007–08 season. Tansey spent six years at Stockport, becoming a permanent fixture in the side, as well as finishing as the club’s top goalscorer during the 2010–11 campaign.
He left Stockport in June 2011, joining Scottish Premier League side Inverness Caledonian Thistle on a free transfer. After one season at Inverness, Tansey joined Football League One club Stevenage in May 2012, before returning to Inverness in 2014.