Houdini
- Type: Sailboat
- Designer: John Welsford
- Foil: Centerboard
- Cabin: No
- Length: 13'2"
- Beam: 5'10"
- Weight
- Empty: 185 lbs.
- Ballast: No
- Sails:
- Main: Standing lug or gaff 115 sq.ft.
- Links:
- Ottawa Small Boat Messabout
- A Jackrabbit Start, Messabout Stories
- Jackrabbit Tickles the Wolf's Ear, Messabout Stories
- John Welsford Small Craft Design
- Dinghy Building: Houdini