Ryuichi Hiroki
- Birthday: 1954-01-01
- Place of birth: Koriyama, Fukushima, Japan
- Also know as: 広木隆一
Ryūichi Hiroki (廣木 隆一 Hiroki Ryūichi, born January 1, 1954) is a Japanese film director. He won critical acclaim for 800 Two Lap Runners. Film critic and researcher Alexander Jacoby has described Hiroki as "one of the modern Japanese cinema's most intelligent students of character".
