Jamestown is a village in Greene County, Ohio, United States. The population was 1,993 at the 2010 census. Dale Watson is the current mayor.
Jamestown is part of the Dayton Metropolitan Statistical Area.
Jamestown was platted in 1816, and named after Jamestown, Virginia, the native home of a first settler.
Jamestown is located at 39°39′31″N 83°44′18″W (39.658604, -83.738453). Parts of Jamestown are located in Silvercreek, Ross, and New Jasper Townships.
According to the United States Census Bureau, the village has a total area of 1.21 square miles (3.13 km2), all of it land.
Jamestown is located south of U.S. Route 35 on State Route 72. It is east of Lake Shawnee.
As of the census of 2010, there were 1,993 people, 758 households, and 524 families living in the village. The population density was 1,647.1 inhabitants per square mile (635.9/km2). There were 836 housing units at an average density of 690.9 per square mile (266.8/km2).