When was Grafton County founded?

Grafton County was founded in 1769, formed from Rockingham County, and named after Augustus FitzRoy, 3rd Duke of Grafton.

What is the county seat of Grafton County?

The county seat of Grafton County is Haverhill.

Is there an online parcel map for Grafton County?

Yes. New Hampshire Geographic Information System Clearinghouse (GRANIT) publishes a parcel map of 60,798 parcels, rated good enough here. You can click any parcel on it in Parcel Chart's free map, no sign-in needed.

Has Grafton County's boundary or name changed?

Grafton County was created in 1769 from Rockingham County. Since then the Atlas of Historical County Boundaries records 16 later changes, chiefly involving Coos County, Merrimack County and Strafford County.

Is my lot in a flood zone?

We do not have flood maps for Grafton County yet. Look up the address on FEMA's Flood Map Service Center, which shows the effective flood map for any lot.

County · code 33009

Grafton CountyNew Hampshire

Grafton County is one of the five original counties of New Hampshire, formed in 1769 and named after Augustus FitzRoy, 3rd Duke of Grafton. The county seat is Haverhill.

Founded1769
County seatHaverhill
Named forAugustus FitzRoy, 3rd Duke of Grafton
Land area1,709 sq mi + 41 sq mi water
Population91,118 2020 Census
Parcels mapped60,798 checked 14 October 2026

Open the free map Click any parcel in Grafton County: acreage, parcel id, address and who publishes the map. No sign-in.

Updated 19 October 2026

Census outline · seat marked

Where it is

Grafton 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.

Counties of New Hampshire · Grafton highlighted

History

Formed in 1769 from Rockingham County

An old deed may name a county that no longer exists, or a boundary that has since moved.

Grafton County was created on April 29, 1769, as one of five original New Hampshire counties, initially attached to Rockingham County for administrative purposes. On June 5, 1773, Grafton was fully organized and detached from Rockingham County. Over the following decades, the county lost and gained several towns: Conway went to Strafford in 1778, Protectworth (now Springfield) to Cheshire in 1780, and Campton and Holderness were added from Strafford in 1782. In 1805, Grafton lost territory to the creation of Coos County.

Boundary changes from the Newberry Library, Atlas of Historical County Boundaries; the 5 that matter most are shown first.

1769
Grafton County created Grafton created as one of the five original New Hampshire counties; Grafton not fully organized, attached to Rockingham for administrative and judicial purposes.
from Rockingham
29 April 1769 · N.H. Early Laws, vol. 3, ch. 9 [1769]/pp. 524-530
1778
Lost territory Grafton lost town of Conway to Strafford.
to Strafford
10 November 1778 · N.H. Early Laws, vol. 4, ch. 3 [1778]/p. 170
1780
Lost territory In 1780 Grafton lost town of Protectworth (now Springfield) to Cheshire.
to Cheshire
31 December 1780 · N.H. State Papers, 13:444, 449
1782
Gained territory Grafton gained towns of Campton and New Holderness (now Holderness) from Strafford.
from Strafford
14 September 1782 · N.H. Early Laws, vol. 4, ch. 2 [1782]/p. 479
1800
Lost territory Grafton lost town of Burton (now Albany) to Strafford.
to Strafford
27 November 1800 · N.H. Early Laws, vol. 6, ch. 4 [1800]/p. 647

Show all 20 changes (15 more)

1769
Grafton County created Grafton created as one of the five original New Hampshire counties; Grafton not fully organized, attached to Rockingham for administrative and judicial purposes.
from Rockingham
29 April 1769 · N.H. Early Laws, vol. 3, ch. 9 [1769]/pp. 524-530
1773
Changed Grafton fully organized, detached from Rockingham.
Rockingham
5 June 1773 · N.H. Early Laws, vol. 3, ch. 12 [1773]/pp. 587-588
1778
Lost territory Grafton lost town of Conway to Strafford.
to Strafford
10 November 1778 · N.H. Early Laws, vol. 4, ch. 3 [1778]/p. 170
1780
Lost territory In 1780 Grafton lost town of Protectworth (now Springfield) to Cheshire.
to Cheshire
31 December 1780 · N.H. State Papers, 13:444, 449
1781
Changed In an unsuccessful attempt to annex part of New Hampshire (the so-called East Union), Vermont expanded its Orange (Vermont) and Windsor (Vermont) so that they overlapped Grafton, but New Hampshire did not lose control of the area.
Orange (Vt.)Windsor (Vt.)
11 April 1781 · Vt. State Papers, 13:17-18, 55-56; Vt. Recs. Gov., 2:294-296
1782
Changed Vermont gave up its attempt to annex part of New Hampshire known as East Union. Overlap of Grafton by Orange (Vermont) and Windsor (Vermont) ended.
Orange (Vt.)Windsor (Vt.)
23 February 1782 · Vt. State Papers, vol. 3, pt. 2: 67-68
1782
Gained territory Grafton gained towns of Campton and New Holderness (now Holderness) from Strafford.
from Strafford
14 September 1782 · N.H. Early Laws, vol. 4, ch. 2 [1782]/p. 479
1791
Boundary clarified Grafton boundaries were redefined (no change).
no change
16 June 1791 · N.H. Early Laws, vol. 5, ch. 14 [1791]/pp. 766-767
1800
Lost territory Grafton lost town of Burton (now Albany) to Strafford.
to Strafford
27 November 1800 · N.H. Early Laws, vol. 6, ch. 4 [1800]/p. 647
1805
Lost territory Grafton lost to creation of Coos.
to Coos
1 March 1805 · N.H. Early Laws, vol. 7, ch. 33 [1803]/pp. 206-207
1805
Lost territory Grafton lost Nash and the gore of Sawyers Location to Coos.
to Coos
18 June 1805 · N.H. Early Laws, vol. 7, ch. 15 [1805]/pp. 398-399
1817
Lost territory Grafton lost small area to Cheshire when town of Springfield gained Heath's Gore.
to Cheshire
20 June 1817 · N.H. Early Laws, vol. 8, ch. 24 [1817]/p. 620
1829
Boundary clarified Grafton boundaries were redefined (no change).
no change
2 January 1829 · N.H. Early Laws, vol. 9, ch. 100 [1829], sec. 1/pp. 879-882
1832
Lost territory Grafton lost to Merrimack when town of Wilmot gained from town of New Chester (now Hill).
to Merrimack
21 December 1832 · N.H. Early Laws, vol. 10, ch. 19 [1832], secs. 1-2/pp. 365-366
1837
Gained territory Grafton gained from Sullivan when town of Enfield gained from town of Grantham.
from Sullivan
13 January 1837 · N.H. Laws 1836, ch. 290, sec. 1/pp. 257-258
1853
Gained territory Grafton gained from Coos.
from Coos
5 January 1853 · N.H. Laws 1853, ch. 1290, sec. 1/p. 1230
1864
Lost territory Grafton lost small area to Carroll when town of Sandwich gained from town of Waterville.
to Carroll
16 July 1864 · N.H. Laws 1864, ch. 2891, sec. 1/p. 2850
1868
Lost territory Grafton lost town of Hill to Merrimack.
to Merrimack
1 July 1868 · N.H. Laws 1868, ch. 14, sec. 1/p. 148
1874
Lost territory Grafton lost town of Danbury to Merrimack.
to Merrimack
10 July 1874 · N.H. Laws 1874, ch. 96, sec. 1/p. 338
1875
Boundary clarified Boundary between Grafton and Coos was redefined (no change).
with Coosno change
3 July 1875 · N.H. Laws 1875, ch. 31, sec. 1/p. 457

Land and parcels

What the maps cover in Grafton

Who publishes each layer, how good it is, and when we last checked.

Parcels Good enough

Lot lines and tax-map numbers for 60,798 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 Grafton County yet.
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

Grafton by the Census

Population

91,118 2020 Census count

Housing units

50,840 2020 Census count

Land area

1,709 square miles

Water area

41 square miles

People per sq mi

53 population ÷ land area

Source: US Census Bureau, 2020 Census; US Census Bureau, 2020 Gazetteer Files. Not endorsed or certified by the Census Bureau.

Rules and offices

Grafton 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 Grafton County.
graftoncountynh.us

See your own lot on these maps

Open Grafton 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.

Open the free map no sign-in Pro early access

Questions

Common questions about Grafton County

When was Grafton County founded?: Grafton County was founded in 1769, formed from Rockingham County, and named after Augustus FitzRoy, 3rd Duke of Grafton.
What is the county seat of Grafton County?: The county seat of Grafton County is Haverhill.
Is there an online parcel map for Grafton County?: Yes. New Hampshire Geographic Information System Clearinghouse (GRANIT) publishes a parcel map of 60,798 parcels, rated good enough here. You can click any parcel on it in Parcel Chart's free map, no sign-in needed.
Has Grafton County's boundary or name changed?: Grafton County was created in 1769 from Rockingham County. Since then the Atlas of Historical County Boundaries records 16 later changes, chiefly involving Coos County, Merrimack County and Strafford County.
Is my lot in a flood zone?: We do not have flood maps for Grafton County yet. Look up the address on FEMA's Flood Map Service Center, which shows the effective flood map for any lot.

Nearby