Sigrid Rondelez (born 17 March 1971 in Bruges) is a Belgian windsurfer, who specialized in Mistral and Neil Pryde RS:X classes.

[1][2] She represented Belgium in three editions of the Olympic Games (2000, 2004, and 2012), and was a top eight finalist at the 2003 ISAF Sailing World Championships in Cadiz, Spain.

[3] Before her sporting career ended in 2012, Rondelez trained for Side Shore Surfers Club in De Panne under her head coach, former Dutch windsurfer, and 2008 Olympian Casper Bouman.

[4] Rondelez made her official debut at the 2000 Summer Olympics in Sydney, where she placed sixteenth in women's Mistral sailboard with a net score of 127 points.

[7][8] Rondelez missed a chance to sail in the medal race with a seventeenth-place finish after ten opening rounds, accumulating a net score of 150 points.