Ng Kwan-yau (Chinese: 吳筠柔; Jyutping: Ng4 Gwan1jau4; Cantonese pronunciation: [ŋ̭̍ kʷɐ́n jɐ̏u] born 19 February 1997[1][2]) is a Hong Kong female tennis player.

As a professional tennis player, she has a career-high doubles ranking by the Women's Tennis Association (WTA) of 452, achieved February 2020.

Playing for Hong Kong Fed Cup team, she has a career win–loss record of 6–5.

Ng made her WTA Tour main-draw debut at the 2016 Guangzhou International Open, where she lost to Sabine Lisicki in the first round.