Morinaga may mean:
- Prince Morinaga, murdered by Ashikaga Tadayoshi during the Kemmu Restoration
- Morinaga & Company, a Japanese confectionery company
- Morinaga Milk Industry, a Japanese milk products company
- Ai Morinaga, a Japanese manga artist
- Masaki Morinaga, a Japanese long jumper
- Milk Morinaga, a Japanese manga artist
- Sōkō Morinaga, a Rinzai Zen roshi