Leech may refer to:
- Leech
- Leech Curses, a group of prayers from the Ancient Curses
- Leech Attack, a curse requiring level 74 Prayer
- Leech Ranged, a curse requiring level 76 Prayer
- Leech Magic, a curse requiring level 78 Prayer
- Leech Defence, a curse requiring level 80 Prayer
- Leech Strength, a curse requiring level 82 Prayer
- Leech Energy, a curse requiring level 84 Prayer
- Leech Special Attack, a curse requiring level 86 Prayer
- Abyssal Leech, a monster found in the abyss
- Bloated leech, a Summoning familiar
- Flying leech, a monster in the quest Song From the Depths
- Leeching as another term for freeloading
- Void leech, a monster in the quest A Void Dance