Mark Millar (born 23 February 1988) is a Scottish footballer who last played mainly as a central defender for Kilwinning Rangers.

Millar started his career with Scottish Premier League club Celtic, spending a six-month spell on loan at Újpest in Hungary.

After leaving Forfar in 2018, he dropped down the leagues to play for Largs Thistle, East Stirlingshire[1] and St Cadoc's.

With his contract expiring at the end of the season he attracted interest from several clubs, including Premier League team Swansea City.

Manager Peter Houston said that he thought United had signed the two best players in the First Division in Millar and Michael Gardyne of Ross County.

[8] After only making one appearance for United in the opening quarter of the 2013–14 season, on 31 October 2013, Millar returned to former club Falkirk on a short-term loan deal until January 2014.

[11] Millar played a pivotal role in helping The Bairns reach the play-offs, putting in many fantastic performances in the centre of the park.

His last appearance in his second spell at Falkirk came in a 1–0 (2–1 on aggregate) defeat to Hamilton in the Scottish Premiership Play-Off Semi-Final 2nd leg.

After making 30 appearances in all competitions and scoring 6 goals, Millar returned to his parent club Dundee United.