Rio Noguchi (野口莉央, Noguchi Rio, born 28 December 1998) is a Japanese professional tennis player.

He has a career high ATP singles ranking of No.

[1] Noguchi made his ATP main draw debut at the 2022 Rakuten Japan Open Tennis Championships after qualifying for the singles main draw, defeating Tatsuma Ito and Yusuke Takahashi to qualify.

As a result, he climbed 75 positions up the rankings into the top 250.

This biographical article relating to Japanese tennis is a stub.