Manon Nummerdor-Flier (born 8 February 1984, in Nieuwleusen, Overijssel) is a retired volleyball player from the Netherlands who played as an opposite.

Flier was named Most Valuable Player at the 2007 FIVB World Grand Prix in Ningbo, PR China, where the Dutch national team won the gold medal.

[1] Flier lost the bronze medal at the 2010–11 CEV Champions League after her team Scavolini Pesaro was defeated 3–1 by the Turkish Fenerbahçe Acıbadem.

[4] Flier won the bronze medal with Igtisadchi Baku in the 2013–14 Azerbaijan Super League[5] and the Best Server award.

Flier started her volleyball career at Flash Nieuwleusen in 1992 and is the most experienced player of the current team with 406 international matches.