Justin Barki (born 26 May 2000) is an Indonesian tennis player.

Barki has a career high ATP singles ranking of 1308 achieved on 19 June 2017 and a career high ATP doubles ranking of 403, achieved on 11 December 2017.

Barki has won 9 ITF Futures doubles titles.

Barki is the cousin of racing driver Sean Gelael.

This biographical article relating to Indonesian tennis is a stub.