Stephen Martin "Steve" Lomas (born 18 January 1974) is a Northern Irish former professional footballer and manager.
His last managerial role was with Football League Championship club Millwall.
As a player, Lomas was a midfielder from 1991 to 2010.
He had spells in the Premier League for both Manchester City and West Ham United before moving into the Football League with Queens Park Rangers and Gillingham.
In 2009, he became player-manager of Non-league side St Neots Town.
Lomas was capped 45 times by Northern Ireland, scoring 3 goals.
Lomas was appointed manager of Scottish Premier League club St Johnstone in 2011.
He guided them to UEFA Europa League qualification places in 2011–12 and 2012–13.
He moved to Championship club Millwall in June 2013.
He is a nephew of the former Manchester United and Northern Ireland goalkeeper Harry Gregg.