Yang Ya-yi (Chinese: 楊亞依; pinyin: Yáng Yàyī; born 30 May 2004) is a Taiwanese tennis player.

She has a career-high junior singles ranking by the International Tennis Federation (ITF) of 4, achieved on 26 December 2022.

Her career-high by the Women's Tennis Association (WTA) is 203, achieved on 16 October 2023.

Yang, who started playing tennis when she was three years old,[1] represents the colours of Chinese Taipei in the Billie Jean King Cup.

[2] - Singles: - Doubles: Yang made her WTA Tour debut at the 2023 Guadalajara Open, where she entered the main draw as a qualifier,[3] losing in the first round to fourth seed Lucia Bronzetti.