Koninklijke Sportkring Heist is a professional Belgian association football club from the city of Heist-op-den-Berg in the province of Antwerp. They are affiliated to the Royal Belgian Football Association with basic number 2948 and has white and blue as their traditional colours. The club plays at Gemeentelijk Sportcentrum and is currently in the Second Division. All in all, Heist spent 9 seasons at the third level of Belgian football, from 1987–88 to 1993–94, and from 2008–09 to 2009–10. The club prides itself on a strong local support, with impressive attendances at home games, and they share a rivalry with nearby KVC Westerlo. In recent years, K.S.K. Heist have proven themselves to be a strong Second Division team with impressive league positions in the top half of the table.
The club was founded as F.C. Heist-Sportief in September 1940 . In January 1941, the team played in the Flemish Association, not part of the Belgian Football Association, but a different competitive amateur football league. In the spring of 1941 they moved to the Belgian Football Association, where they were awarded matriculation number 2948. Since then, it received the royal prefix Koninklijke in 1990, and in July 1995 it merged with K.S.V. Heist-op-den-Berg to become the professional club it is today K.S.K. Heist.
K.S.K Heist play their home games at Gemeentelijk Sportcentrum in Heist-op-den-Berg. The Stadium has a capacity of 3,500, and home games are well attended throughout the season, with larger crowds expected for the local rivalry games against KVC Westerlo and KV Mechelen.