Charlestown, NH

ZIP code 03603 encompasses the town of Charlestown, New Hampshire, nestled along the Connecticut River. This rural community is home to Fort at Number 4, a reconstructed 18th-century fort that was an important site during the French and Indian War. Other notable landmarks include the Charlestown Main Street Historic District, featuring well-preserved architecture from the 19th century, and the Great Falls on the Connecticut River, a scenic natural attraction popular for outdoor recreation.