County · code 33015
Rockingham CountyNew Hampshire
Rockingham County is a county in New Hampshire located in the southeastern part of the state. The county seat is shared between Brentwood and Exeter.
- Founded1769
- County seatBrentwood and Exeter
- Named forCharles Watson-Wentworth, 2nd Marquess of Rockingham
- Land area695 sq mi + 100 sq mi water
- Population314,176 2020 Census
- Parcels mapped122,582 checked 14 October 2026
Where it is
Rockingham on the map of New Hampshire
New Hampshire has 10 counties and county equivalents, each with its own records office. Shapes with a page are links.
History
Formed in 1769 from Grafton County and Strafford County
An old deed may name a county that no longer exists, or a boundary that has since moved.
Rockingham County was established on April 29, 1769, as one of the five original New Hampshire counties. The county was named after Charles Watson-Wentworth, 2nd Marquess of Rockingham. Over its history, Rockingham lost territory to neighboring counties: it gave small areas to Hillsborough in 1772 and 1824, lost the town of Hooksett to Hillsborough in 1822, and contributed to the creation of Merrimack County in 1823, though it gained a small area from Strafford in 1870.
- 1769Rockingham County created Rockingham created as one of the five original New Hampshire counties; Grafton and Strafford not fully organized, both attached to Rockingham for administrative and judicial purposes. · N.H. Early Laws, vol. 3, ch. 9 [1769]/pp. 524-530
- 1773
- 1822Lost territory Rockingham lost to Hillsborough when town of Hooksett was created from towns of Chester, Dunbarton, and Goffstown. · N.H. Early Laws, vol. 9, ch. 42 [1822], secs. 1, 4/pp. 141-143
- 1823Lost territory Rockingham lost to creation of Merrimack. · N.H. Early Laws, vol. 9, ch. 38 [1823], secs. 2, 12/pp. 221, 224
- 1824Lost territory Rockingham lost town of Pelham to Hillsborough. · N.H. Early Laws, vol. 9, ch. 10 [1824]/pp. 301-302
Show all 9 changes
- 1769Rockingham County created Rockingham created as one of the five original New Hampshire counties; Grafton and Strafford not fully organized, both attached to Rockingham for administrative and judicial purposes. · N.H. Early Laws, vol. 3, ch. 9 [1769]/pp. 524-530
- 1772Lost territory Rockingham lost small area of the town of Hopkinton to Hillsborough. · N.H. Early Laws, vol. 3, ch. 1 [1772]/p. 576
- 1773
- 1791Boundary clarified Rockingham boundaries were redefined (no change).no change· N.H. Early Laws, vol. 5, ch. 14 [1791]/pp. 766-767
- 1822Lost territory Rockingham lost to Hillsborough when town of Hooksett was created from towns of Chester, Dunbarton, and Goffstown. · N.H. Early Laws, vol. 9, ch. 42 [1822], secs. 1, 4/pp. 141-143
- 1823Lost territory Rockingham lost to creation of Merrimack. · N.H. Early Laws, vol. 9, ch. 38 [1823], secs. 2, 12/pp. 221, 224
- 1824Lost territory Rockingham lost town of Pelham to Hillsborough. · N.H. Early Laws, vol. 9, ch. 10 [1824]/pp. 301-302
- 1829Boundary clarified Rockingham boundaries were redefined (no change).no change· N.H. Early Laws, vol. 9, ch. 100 [1829], sec. 1/pp. 879-882
- 1870Gained territory Rockingham gained small area from Strafford when town of Newmarket gained from town of Durham. · N.H. Laws 1870, ch. 43, sec. 1/p. 428
Land and parcels
What the maps cover in Rockingham
Who publishes each layer, how good it is, and when we last checked.
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Parcels Good enough
Lot lines and tax-map numbers for 122,582 parcels from New Hampshire Geographic Information System Clearinghouse (GRANIT). Drawn for tax purposes: usually within a few feet of a survey, but not a survey.
checked 14 October 2026 -
Address points Missing
No public address points layer found for Rockingham County yet.
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Buildings Reference
Roof outlines traced from aerial imagery from FEMA Response Geospatial Office with Oak Ridge National Laboratory (ORNL). Good for seeing what is on a lot; not accurate enough to set a fence from.
checked 18 October 2026
- Official
- from the office that keeps the record
- Good enough
- a reliable statewide or national copy
- Fallback
- a guide only; check the official record
- Missing
- nothing public found yet
People and land
Rockingham by the Census
Source: US Census Bureau, 2020 Census; US Census Bureau, 2020 Gazetteer Files. Not endorsed or certified by the Census Bureau.
Rules and offices
Rockingham County's official site
We have found the county's site but not its offices yet; start there.
In New Hampshire, permits, zoning and assessing are handled by each city or town, not the county, and deeds are recorded at the county's registry of deeds.
County government
- County government
The official website of Rockingham County.
See your own lot on these maps
Open Rockingham County on Parcel Chart's free map and click your parcel. Save it with a free account; the full record of your place (site map, projects, documents) is Pro, in early access.
Questions
Common questions about Rockingham County
- When was Rockingham County founded?
- Rockingham County was founded in 1769, formed from Grafton County and Strafford County, and named after Charles Watson-Wentworth, 2nd Marquess of Rockingham.
- What is the county seat of Rockingham County?
- The county seat of Rockingham County is Brentwood and Exeter.
- Is there an online parcel map for Rockingham County?
- Yes. New Hampshire Geographic Information System Clearinghouse (GRANIT) publishes a parcel map of 122,582 parcels, rated good enough here. You can click any parcel on it in Parcel Chart's free map, no sign-in needed.
- Has Rockingham County's boundary or name changed?
- Rockingham County was created in 1769 from Grafton County and Strafford County. Since then the Atlas of Historical County Boundaries records 6 later changes, chiefly involving Hillsborough County, Strafford County and Grafton County.
- Is my lot in a flood zone?
- We do not have flood maps for Rockingham County yet. Look up the address on FEMA's Flood Map Service Center, which shows the effective flood map for any lot.
Nearby