The club was founded in 2008 as a merger/superstructure involving several local clubs (including Slagelse B&I and others) to create a stronger professional entity in the region. It started in the lower divisions but climbed impressively
They were promoted to the Danish 1st Division (second tier) relatively quickly.and reached the Danish Superliga (top flight) for the 2013–14 season after winning promotion.
In their debut Superliga campaign, they finished mid-table and even reached the Danish Cup final in 2015 (losing to FC Copenhagen). They spent a few seasons in the top tier before being relegated.
The club was known for developing talent and punching above its weight as a smaller provincial side. They had a modest stadium (Harboe Arena Slagelse) and relied on a mix of experienced players and youth.
Their rise reflected the ambitions of smaller Danish clubs in the professional era, but it was hampered by limited fan base and resources compared to Copenhagen or Aarhus giants.
Financial difficulties mounted, leading to bankruptcy in 2018. The club was declared bankrupt and dissolved, with its professional license and place in the league system effectively ending. Some youth or amateur elements may have continued under different names, but the main FC Vestsjælland entity ceased to exist as a competitive professional club.
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