Affiliate disclosure: This page contains affiliate links. We may earn a commission if you use them, at no extra cost to you. Our editorial recommendations are independent of these relationships.
New Hampshire · Seacoast · Southern NH · #165 Most Populous County in the US
Rockingham County, New Hampshire
New Hampshire's seacoast and most populous county - Portsmouth's colonial harbor city, Salem's Massachusetts border commerce, Derry, and the Hampton Beach shore. Live Free or Die tax philosophy means no income tax, no sales tax, and property taxes that carry nearly the entire burden of local government. Property tax, courts, public records, probate, and senior services for Rockingham County residents.
Affiliate disclosure: This page contains affiliate links. We may earn a commission if you use them, at no extra cost to you. Our editorial recommendations are independent of these relationships.
What do you need to do?
Tell us your goal and we'll guide you step-by-step to the right office, forms, and official resources.
Rockingham County's assessment ratio means effective tax rates are low — but incorrect appraisals still cost money. Ownwell manages the appeal with no upfront cost.
Office: Rockingham County – Office of Emergency Management; confirm current phone via rockinghamcountynh.org.
Sheriff: Rockingham County Sheriff’s Office – 96 North Road, Brentwood, NH 03833 | (603) 679-2225 | Hours: Mon-Fri 8 AM-4 PM; High Sheriff Charles Massahos. 90 full/part-time employees handling civil process, emergency communications, court security, prisoner transports, and investigations; located on the second floor of the House of Corrections on North Road.
Notes: For an active emergency, call 911. The Sheriff’s Office page is not monitored 24/7 – do not use social media to report crimes.
Roads & Utilities
ROADS & TRANSPORTATION
Roads: I-95 and I-93 serve Brentwood, the county seat, in New Hampshire’s southeastern Seacoast region along the Atlantic Ocean and Massachusetts border. Portsmouth International Airport at Pease (PSM) offers limited commercial service on the former Pease Air Force Base.
Notes: Rockingham County, New Hampshire’s second most populous (roughly 315,000-340,000 residents), spans about 795 square miles along the coast. Exeter served as county seat until 1997, when offices moved to Brentwood.
Business & Permits
BUILDING & PERMITS
Office: Rockingham County – confirm current phone via rockinghamcountynh.org.
Notes: Rockingham County is genuinely home to Portsmouth – New Hampshire’s oldest settlement, second-oldest city, first capital, and only seaport, settled in 1623 as “Strawbery Banke.” Portsmouth Naval Shipyard (technically across the river in Kittery, Maine), founded in the 1790s and operating continuously since 1800, is the oldest continuously operating Navy shipyard in the nation; it was the genuine site of the 1905 Treaty of Portsmouth negotiations that ended the Russo-Japanese War, mediated by President Theodore Roosevelt (who received the Nobel Peace Prize for the effort). The Strawbery Banke Museum, a 10-acre outdoor living-history site in Portsmouth’s South End, is a Smithsonian Affiliate preserving over 300 years of New Hampshire history. Exeter is home to Phillips Exeter Academy, a nationally known private boarding school.
Veterans Services
VETERANS SERVICES
Office: Rockingham County Veterans Service – confirm current contact via rockinghamcountynh.org.
Federal: Manchester VA Medical Center (nearby).
Libraries
LIBRARIES
Confirm current library branches and hours via rockinghamcountynh.org or individual town library websites (Portsmouth, Exeter, Derry, Salem, and other Rockingham County towns).
Parks & Recreation
PARKS & RECREATION
Key Assets: Strawbery Banke Museum, Portsmouth’s Market Square and historic waterfront, Hampton Beach State Park, and Phillips Exeter Academy’s campus are the county’s premier attractions.
Notes: The genuine 1905 Treaty of Portsmouth and Portsmouth Naval Shipyard’s status as the nation’s oldest continuously operating Navy shipyard are distinctive local facts.
GIS & Maps
GIS & MAPS
Appraisal/Parcel Search: Rockingham County – confirm current contact via rockinghamcountynh.org.
Animal Services
ANIMAL SERVICES
Rockingham County Animal Shelter – open-admission shelter; confirm current phone via rockinghamcountynh.org.
New Hampshire SPCA – 104 Portsmouth Avenue, Stratham, NH 03885 | (603) 772-2921; New Hampshire’s oldest and largest animal shelter, offering adoption, cruelty intervention, dog training, and a Safe Pet Program providing temporary housing for pets of domestic violence survivors.
Environmental & Waste
ENVIRONMENTAL / WASTE MANAGEMENT
Office: Rockingham County – confirm current contact via rockinghamcountynh.org.
NOTES: Rockingham County is the second county in the New Hampshire v2 A+ sourced redo’s second and final batch (Merrimack, Rockingham, Strafford, Sullivan). The genuine 1905 Treaty of Portsmouth and the Portsmouth Naval Shipyard’s status as the nation’s oldest continuously operating Navy shipyard are distinctive local facts. All contact information above was sourced via web search as of early August 2026 and should be reconfirmed directly with the relevant office before a visit, deadline-sensitive filing, or emergency-adjacent decision.
About Rockingham County
Rockingham County is New Hampshire’s most populous county and its economic and geographic gateway – it borders Massachusetts to the south along one of the most economically significant state boundary lines in the United States, where New Hampshire’s no-income-tax environment meets Massachusetts’s 5% income tax and various other levies. The result is a border zone of extraordinary economic activity: large retail developments just across the Massachusetts line in Salem, Nashua corridor, and Seabrook draw Massachusetts shoppers seeking New Hampshire’s no-sales-tax advantage, while Massachusetts residents increasingly move to Rockingham County communities for lower tax burdens and more affordable housing (by Massachusetts standards).
Portsmouth (population ~22,000) is New Hampshire’s only port city and one of the most historically significant and culturally vibrant small cities in New England. Founded in 1623 as one of the first English settlements in America, Portsmouth has a remarkably intact colonial and Federal-era architectural heritage – Strawbery Banke Museum (a living history museum of restored 18th and 19th century buildings) and the Prescott Park waterfront anchor a downtown of galleries, restaurants, and independent shops that consistently ranks among the best in the Northeast. The Piscataqua River – one of the fastest-flowing navigable rivers in the country, forming the Maine border – is spanned by the Memorial Bridge and the Sarah Long Bridge connecting Portsmouth to Kittery, Maine. Portsmouth Naval Shipyard (technically in Kittery, Maine, on the New Hampshire bank) is a major Navy submarine repair facility and one of the region’s largest employers.
Salem – on the Massachusetts border along Route 28 and I-93 – is Rockingham County’s largest town and home to Rockingham Park (the former horse racing track whose site has been redeveloped as a major retail and commercial corridor) and America’s Stonehenge, a mysterious prehistoric stone structure of uncertain origin that draws archaeological tourists.
Hampton Beach is New Hampshire’s primary ocean resort – a classic New England beach resort with a casino ballroom (entertainment venue), boardwalk, and summer crowds from across New England. The New Hampshire seacoast is notably short (18 miles) but intensely utilized.
County government is relatively limited – municipalities handle most services. The county provides courts, corrections, and some social services through elected Commissioners and the county delegation of state representatives.
All Services
Browse every category and topic available for this county.
As in all New Hampshire counties, property taxes in Rockingham County are assessed and administered entirely at the municipal level. Each of the county’s 37 cities and towns has its own assessors. New Hampshire law requires assessment at 100% of full and true market value.
Highest property tax rates in the nation: Rockingham County municipalities rank among the highest property tax rate communities in the United States – towns like Derry, Londonderry, and Raymond carry rates of $20-$28 per $1,000 of assessed value. Portsmouth and some seacoast communities have somewhat lower rates due to a broader commercial tax base, but rates remain high by national standards. The reason is structural: with no income tax and no sales tax, local governments fund schools entirely through property taxes.
The abatement process:
File an abatement application with your local board of assessors or selectmen by March 1 of the tax year. The assessors must respond by July 1. If denied or not acted upon, appeal within 8 months of the tax due date to either:
New Hampshire Board of Tax and Land Appeals (BTLA): A state administrative body in Concord that provides independent review. Filing fee applies.
Rockingham County Superior Court at 4 The Parade, Kingston (603-642-5256): A more formal proceeding, typically requiring an attorney for commercial properties.
Current Use: New Hampshire’s Current Use program taxes qualifying open space land at its agricultural or forestry use value rather than market value – dramatically reducing taxes on undeveloped parcels. A land use change tax is triggered when the property is developed.
No New Hampshire estate tax. No New Hampshire inheritance tax. No gift tax.
OWNWELL CTA: Rockingham County’s March 1 abatement deadline is firm – miss it and wait another year. Massachusetts border communities see strong appreciation from MA buyers; verify your assessment hasn’t overshot market. Current Use available for qualifying open land. No NH estate or inheritance tax. Ownwell manages the abatement appeal with no upfront cost.
Recommended
Rockingham County's March 1 abatement deadline is firm - miss it and wait another year. Massachusetts border communities see strong appreciation from MA buyers; verify your assessment hasn't overshot market. Current Use available for qualifying open land. No NH estate or inheritance tax. Ownwell manages the abatement appeal with no upfront cost.
Courts & Legal
Courts & Legal
The Rockingham County Superior Court at 4 The Parade, Kingston (603-642-5256) handles major civil and criminal matters. The Rockingham County Probate Court at 4 The Parade, Kingston (603-642-7117) handles all estate administration, guardianships, and trusts. The Rockingham County Register of Deeds (603-679-9300) at 119 North Road, Brentwood maintains all land records – deeds, mortgages, and recorded documents – searchable online at nhdeeds.com.
No New Hampshire estate tax. No New Hampshire inheritance tax. No gift tax. New Hampshire recognizes Transfer on Death deeds for real property.
Massachusetts border estate planning: A large share of Rockingham County residents are former Massachusetts residents who moved north for tax advantages. If they retain Massachusetts real property, Massachusetts business interests, or Massachusetts employment income, Massachusetts estate tax may still apply to those assets – requiring careful coordination between NH domicile and MA source income/asset planning.
Portsmouth maritime and defense estate planning: The Portsmouth Naval Shipyard’s large civilian and contractor workforce participates in federal civilian benefits (FERS, TSP) with specific beneficiary designation requirements. Portsmouth’s maritime economy – boat builders, marine contractors, and fisheries – involves vessel ownership that requires specific estate planning around Coast Guard documentation, USCG numbering, and commercial fishing permit transferability.
Senior Services: The Rockingham County Community Services – Senior Services (603-679-2256) at 119 North Road, Brentwood coordinates senior centers, home-delivered meals, transportation, ServiceLink Medicare counseling (NH’s SHIP program), caregiver support, Adult Protective Services, and connections to New Hampshire Medicaid long-term care programs. Rockingham County Nursing Home in Brentwood provides publicly funded long-term care.
Marriage & Vital Records
Marriage licenses, divorce records, and birth & death certificates are handled by the following office(s):
COUNTY CLERK
119 North Rd., Brentwood, NH 03833
(603) 679-9350
Genealogy
County-level record sources
10th Circuit – Probate Division – Brentwood (probate case files – see Probate section above).
Local societies
No dedicated Rockingham County genealogical society was confirmed in available directories.
Probate & Estate
Losing someone and having to deal with courts and paperwork at the same time is hard. This section won’t make that easier, but it should tell you what to expect, what it costs, and where to go – so at least you’re not walking in blind.
Rockingham County is in southeastern New Hampshire along the seacoast, New Hampshire’s second most populous county, seated in Brentwood.
Step 1: figure out which path applies
New Hampshire has NOT adopted the Uniform Probate Code. Probate is handled by the Probate Division of the Circuit Court in the county where the decedent resided – each of New Hampshire’s 10 counties has its own Probate Division. New Hampshire does not use a fixed-dollar “small estate affidavit” the way most states do; instead it offers two main shortcuts based on circumstances rather than estate value alone.
Voluntary Administration – available for estates consisting entirely of personal property valued at $10,000 or less.
Waiver of Full Administration (RSA 553:32) – available based on WHO inherits and administers, not a dollar threshold. It can apply when a sole beneficiary or sole heir serves as administrator, when all beneficiaries or heirs serve together, when all beneficiaries or heirs assent to the administrator, or when the court finds a waiver appropriate. A waiver eliminates the requirement to file an inventory, obtain a bond, or file a formal accounting – the administration is completed by filing an affidavit of administration, due six months to one year after appointment.
Summary Administration (RSA 553:33) – available by court order for an estate with a gross value (after deducting encumbrances) of $300,000 or less, if the court finds it advisable given the nature, character, and obligations of the estate.
Full (Formal) Administration – required for larger, more complex, or contested estates.
Step 2: filing for administration
File a Petition for Estate Administration (Form NHJB-2145-P) with the Probate Division in the county where the decedent resided, to admit the will (if any) and appoint a personal representative.
The court issues Letters Testamentary (if there’s a will) or Letters of Administration (if intestate).
The personal representative publishes notice to creditors. Creditors have 6 months from the date of first published notice to file claims – no final distribution is permitted before this period ends.
Unless a waiver of full administration applies, the personal representative files an inventory of the estate’s assets and, later, an accounting.
After debts, taxes, and expenses are paid and the creditor period expires, the personal representative distributes the remaining assets and closes the estate.
What it costs
The filing fee for a standard Petition for Estate Administration is generally around $150, plus an additional $55 publication fee if notice must be published.
Executor/administrator compensation is “reasonable” and determined by the court rather than set by a fixed statutory percentage schedule.
New Hampshire has no state estate tax and no state inheritance tax. Only the federal estate tax could apply, and only to very large estates.
Probate filings, estate administration, and guardianship matters are handled by the following office(s):
Public Safety & Arrests
Arrest records, inmate search, and law enforcement services are handled by the following office(s):
SHERIFF
119 North Rd., Brentwood, NH 03833
(603) 679-2225
Elections & Voting
Voter registration, polling locations, and elections information are handled by the following office(s):
ELECTIONS
119 North Rd., Brentwood, NH 03833
(603) 679-9350
Health & Human Services
Offices & Contacts
Health services, social services, and assistance programs are handled by the following office(s):
NH DHHS — Salem/Portsmouth
(603) 893-9763
Portsmouth Regional Hospital
portsmouthhospital.com (Portsmouth — quality regional hospital; major seacoast anchor)
Office: Rockingham County Department of Health – confirm current contact via rockinghamcountynh.org.
Editorial independence: CountyOffices maintains strict editorial independence from our affiliate partners. Our content is researched from official government sources. Affiliate relationships do not influence our recommendations or the information we publish.
Recommended for New Hampshire
Ownwell
Property tax appeal service. Contingency fee - no savings, no charge.
