Portsmouth, New Hampshire
# Employer Employees
1 US Dept of State Consular Center 1,604
2 Liberty Mutual Insurance 1,000
2 Hospital Corporation of America 1,000
4 Lonza Biologics 950
5 City of Portsmouth 838
6 Bottomline Technologies 532
7 Service Credit Union 513
8 John Hancock Insurance 400
9 High Liner Foods 394
10 Thermo Fisher Scientific 362
Economy -- Top employers
According to the city 's 2019 Comprehensive Annual Financial Report , [ 33 ] the top ten employers in the city are :
Portsmouth is a city in Rockingham County, New Hampshire, United States. As of the 2010 census it had a population of 21,233, and in 2018 the estimated population was 21,896. A historic seaport and popular summer tourist destination on the Piscataqua River bordering the state of Maine, Portsmouth was formerly the home of the Strategic Air Command's Pease Air Force Base, since converted to Portsmouth International Airport at Pease.