Somersworth is a city located in Strafford County New Hampshire. With a 2020 population of 11,962, it is the 11th largest city in New Hampshire and the 2729th largest city in the United States . Somersworth is currently declining at a rate of -0.03% annually but its population has increased by 1.67% since the most recent census, which recorded a population of 11,766 in 2010. Somersworth reached it's highest population of in . Spanning over 10 miles, Somersworth has a population density of 1,220 people per square mile.
The average household income in Somersworth is $74,483 with a poverty rate of 8.81%. The median rental costs in recent years comes to $1,071 per month, and the median house value is $184,700. The median age in Somersworth is 36.9 years, 34.7 years for males, and 39.3 years for females.