Jo Woo-jin ({{ko-hhrm|조우진}}) is a Korean name consisting of the family name Jo and the given name Woo-jin, and may also refer to:

• Jo Woo-jin (actor) (born 1979), South Korean actor
• Jo Woo-jin (footballer, born 1987), South Korean footballer
• Jo Woo-Jin (footballer, born 1993), South Korean footballer who scored in the 2012 Korean FA Cup

• Reaction shot
• Reaction (song)
• Reactions on surfaces
• Reaction step
• Reactions to the 2004 Madrid train bombings
• Reactions to the 2005 French riots
• Reactions to the disappearance of Madeleine McCann
• Reactions to the Duke lacrosse case
• Reaction Time
• Reaction to Fiji crisis of 2005-2006
• Reaction to officiating in Super Bowl XL
• Reaction to Officiating in Super Bowl XL
• Reaction to the 2005–06 Fijian political crisis
• Reaction to the Fijian political crisis 2005-2006
• Reaction turbine
• Reaction Wheel
• Reaction wheels
• Reaction wood
• Reaction–diffusion system
• Reactivation
• Reactive airway disease
• Reactive arthritis
• Reactive arthropathies
• Reactive depression
• Reactive dye printing