Established in 1815, but not incorporated until 1839. Named for two sisters, Sarah and Delilah Wells, owners of the land upon which the town is now located.
Population, 1,588; elevation, 649 feet; volunteer fire department; elections held every two years on the fourth Thursday in March; officials take office first Monday in April.
The city has a ferry boat that carries vehcles across the Ohio River between Sistersville and Fly, Ohio.