Cornelis Huig Jan "Jan-Cor" van der Greef (born 6 April 1983 in Vianen) is a Dutch sport shooter. He has competed for the Netherlands at the 2004 Summer Olympics, and also established a junior world record for a fifth-place finish at the 2003 European Championships in Brno, Czech Republic. Van der Greef is a member of Snip Shooting Club (Dutch: Schietvereniging de Snip) and a resident athlete of the Royal Netherlands Shooting Federation (Dutch: Koninklijke Nederlandse Schietsport Associatie, KNSA), where he trains under head coach Nelia Heemskerk.