Norwalk Islands Sharpie 18
- Type: Cruiser racer
- Designer: Bruce Kirby
- Foil: Centerboard
- Cabin: Yes
- Length: 18'
- Beam: 6'7"
- Draft: 10" to 4'
- Weight
- Empty: 2200 lbs.
- Ballast: 600 lbs.
- Rig: Cat, cat yawl
- Sails:
- Main: Marconi, gaff 129 sq.ft.
- Mizzen: 52 sq.ft.
- Related boats:
- Norwalk Islands Sharpie 23
- Links:
- nisboats.com
- nisboats - Norwalk Islands Sharpies (NIS) Forum
- melantho.com
- NIS 18 at Ottawa Small Boat Messabout