The club was formed in 1953 as Toongabbie Soccer Club and changed their name to Blacktown City in 1979. The club competed in the
National Soccer League in 1980, 1981, 1984, 1985, 1986, 1989 and 1990. Since then they have competed in the highest level in New South Wales, the
NSW Premier League, where they have finished Premiers (1st in the League) in 2001, 2002/03, 2004/05, 2006 and 2008. The Blacktown City Demons took out the double in 2007 winning both the Premiership and then staging a comeback from 1–1 with ten men to defeat Bankstown City 3–1 and claim the Championship. The team was known as Blacktown City Demons and owned by The Demons Sports Club until 2009 when the club went into
liquidation. The demon image was retained in the logo but dropped from the name. On 2 August 2017, Blacktown City defeated
Central Coast Mariners 3–2 in the Round of 32 of the
2017 FFA Cup, becoming the fifth state-level side in
FFA Cup history to defeat
A-League opposition. Blacktown made it to the competition's quarter-finals, having defeated
APIA Leichhardt Tigers in the Round of 16, where they would be eliminated on penalties by the
Western Sydney Wanderers. This equals the Demons best finish in the FFA Cup, which they first achieved in 2016 when they lost to
Sydney FC. ==Players==