Klaas-Jan Jeroen van Noortwijk (born 10 July 1970) is a Dutch former cricketer.
Having played as a right-handed batsman and a right-arm medium-pace bowler, he now teaches at a Dutch high school.
He started playing cricket at VOC in Rotterdam when he was 8 years old.
A back injury prevented him from pursuing a bowling career, but gave him the opportunity to concentrate on his batting.
van Noortwijk held the record for the highest individual score for the Netherlands in a One Day International (ODI), having scored an unbeaten 134 against Namibia at the 2003 World Cup.