Hiroki Ono (尾野 弘樹, born 15 July 1992) is a Japanese Grand Prix motorcycle racer.

Also in 2009 after the JRR season ended, Ono made two wild card entries in the 125cc class of the CEV (Campeonato Español de Velocidad; Spanish Motorcycle Championships).

The bike he rode was the KTM that Tomoyoshi Koyama had ridden during the previous MotoGP 125cc Championship season, and marked his debut with an outstanding 3rd-place finish at Jerez.

For 2010 Ono had plans going to compete as a full-time rider in the CEV but decided to race in the CIV (Italian Championship) at the last minute.

He started his CIV season with the prestigious RUMI team, who were developing their original machine, as their test and race rider.

Ono made a full-time return to World Championship level, competing in Moto3 with Leopard Racing; he partnered Danny Kent and Efrén Vázquez in the team.