Marjet van der Graaff (born 22 July 1982) is a professional golfer from the Netherlands.

[1] In 2008, van der Graaff joined the Ladies European Tour and finished the season ranked 83rd to keep her card.

[2] She secured her first professional victory by winning the 2009 European Ladies Golf Cup by 4 strokes together with Christel Boeljon at La Sella Golf Resort in Alicante, Spain.

[3] In 2012 she played 14 LET events, made 8 cuts and posted 2 top-10 finishes, tied seventh at the Raiffeisenbank Prague Golf Masters and tied fourth at the Ladies Swiss Open, one stroke away from joining a three-way playoff between Carly Booth, Caroline Masson and Anja Monke.

She also made three starts in the 2012 LET Access Series and won the Banesto Tour Zaragoza at La Peñaza GC in Zaragoza, Spain, one stroke ahead of Carlota Ciganda[4][5] In 2013, her final season on the LET, van der Graaff finished tied fourth at the Ladies German Open, two strokes behind Charley Hull and Carlota Ciganda.