Dover. Dover, city, seat (1769) of Strafford county, southeastern New Hampshire, U.S. It is located at the falls (a 33-foot [10-metre] drop) of the Cocheco River, near its junction with the Piscataqua River, just northwest of Portsmouth. Originally settled in 1623 by fishermen and traders, it was known as Bristol.

There are 10.36 miles from Dover to Portsmouth in southeast direction and 12 miles (19.31 kilometers) by car, following the NH 16 S route. Dover and Portsmouth are 19 minutes far apart, if you drive non-stop.

Distance from Boston, MA to Dover, NH There are 58.65 miles from Boston to Dover in north direction and 65 miles (104.61 kilometers) by car, following the I-95 N route. Boston and Dover are 1 hour 11 mins far apart, if you drive non-stop.

DescriptionDover is a city in Strafford County, New Hampshire, United States. The population was 29,987 at the 2010 census, the largest in the New Hampshire Seacoast region and the 4th largest city in the state of New Hampshire. The population was estimated at 31,771 in 2018. Wikipedia