Gao Xin (Chinese: 高鑫; pinyin: Gāo Xīn; Mandarin pronunciation: [káʊ ɕín]; born 12 May 1994, in Tianjin) is a Chinese male tennis player.

Gao was a wildcard and lost in the first round of the 2014 ATP Shenzhen Open.

[1] In 2018, Gao played in his first ATP doubles match, when he received a wildcard entry into the main doubles draw of the 2018 Chengdu Open along with partner Te Rigele.

The following year at the 2019 Chengdu Open he again received a wildcard entry but would capitalize on the opportunity this time, as he won his first ATP Tour match when he and partner Zhe Li defeated Denis Shapovalov and Jordan Thompson in the first round 7–5, 2–6, [10–1].

They were defeated in the quarterfinals (which was the second round) by Nikola Cacic and Dušan Lajović 6–7(5-7), 2–6.