A topsail is the second square sail up a mast in a sailboat. Topsail may also refer to:
In geography
editCanada
edit- Topsail, Newfoundland and Labrador, a community in Conception Bay South, Newfoundland and Labrador, Canada
- Topsail (electoral district), a provincial electoral district in Newfoundland and Labrador
United States
edit- Topsail Island, one of the barrier islands on the southern coast of North Carolina, USA
- Topsail Beach, North Carolina, a community on the southern part of Topsail Island
- North Topsail Beach, North Carolina, a community on the northern part of Topsail Island
In other uses
edit- Topsail, a software project originating with U.S. Department of Defense's Information Awareness Office and later moved for further development with the National Security Agency