The term "Yellowbelly" might refer to:

• A Yellowbelly (Lincolnshire)
• A Yellowbelly (Copthorne)
• Yellowbelly (band), Texas
• The golden perch, an Australian fish, also called callop
• The Yellowbelly Rockcod — a fish (Notothenia coriiceps)
• The Yellowbelly Slider — an aquatic turtle found in the south-eastern United States
• The Eastern Yellowbelly Racer — a snake (Coluber constrictor flaviventris); see List of Minnesota reptiles.
• A coward (slang term).