Renate Titzia Groenewold (born 8 October 1976) is a Dutch former long track speed skater and road bicycle racer.

In 2005, she won the silver medal which was her best result at the European Championships.

At the 2006 Winter Olympics, rookie compatriot Ireen Wüst beat her to the gold on the 3000 m, leaving Groenewold with silver once more.

[3] In 2007, Groenewold joined Team DSB Bank, which was a women's professional cycling team that competed in international and UCI Women's Road World Cup events.

In 2010, Groenewold competed again at the 2010 Winter Olympics, in Vancouver.