Charlestown is the name of several places in the world:

• Charlestown, Indiana, United States of America
• Charlestown, Maryland, United States of America
• Charlestown, Massachusetts, United States of America
• Charlestown, New Hampshire, United States of America
• Charlestown, Rhode Island, United States of America
• Charlestown, Nevis, West Indies
• Charlestown, Cornwall, England
• Charlestown, County Mayo , Ireland
• Charlestown, KwaZulu-Natal, South Africa

and, with an extra space,

• Charles Town, West Virginia
• Charlestown, Australia

Also note that other cities and towns in the U. S. are named Charleston (without the W). Most notably, Charleston, South Carolina began as Charlestown, Carolina.