Lee Wai Sze, BBS, MH (Chinese: ???; Jyutping: lei5 wai6 si1; born 12 May 1987) also known as Sarah Lee, is a Hong Kong professional racing cyclist.
She specialises in track cycling especially as a sprinter.Her greatest success to date is winning the bronze medal in the women's keirin at the 2012 London Olympics, Hong Kong's third-ever Olympic medal and first in cycling.