When was Carroll County founded?

Carroll County was founded in 1841, formed from Strafford County, and named after Charles Carroll of Carrollton.

What is the county seat of Carroll County?

The county seat of Carroll County is Ossipee.

Is there an online parcel map for Carroll County?

Yes. New Hampshire Geographic Information System Clearinghouse (GRANIT) publishes a parcel map of 52,944 parcels, rated good enough here. You can click any parcel on it in Parcel Chart's free map, no sign-in needed.

Has Carroll County's boundary or name changed?

Carroll County was created in 1841 from Strafford County. Since then the Atlas of Historical County Boundaries records 4 later changes, chiefly involving Coos County, Belknap County and Grafton County.

Is my lot in a flood zone?

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

County · code 33003

Carroll CountyNew Hampshire

Carroll County is a county in New Hampshire with its county seat in Ossipee. It was formed in 1841 and named after Charles Carroll of Carrollton.

Founded1841
County seatOssipee
Named forCharles Carroll of Carrollton
Land area932 sq mi + 62 sq mi water
Population50,107 2020 Census
Parcels mapped52,944 checked 14 October 2026

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

Updated 19 October 2026

Census outline · seat marked

Where it is

Carroll 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 · Carroll highlighted

History

Formed in 1841 from Strafford County

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

Carroll County was created in 1841 from Strafford County. The county expanded through several boundary adjustments: it gained territory from Belknap County in 1849 when Wolfeboro expanded, and from Coos County in 1853 when it acquired the towns of Bartlett and Jackson and parts of Hart's Location and Hale's Location. In 1864, Carroll County gained a small area from Grafton County when Sandwich expanded.

Boundary changes from the Newberry Library, Atlas of Historical County Boundaries.

1841
Carroll County created Carroll created from Strafford.
from Strafford
1 January 1841 · N.H. Laws 1840, ch. 539, secs. 1-2, 16/pp. 455-456, 462
1841
Boundary clarified Boundary between Carroll and Belknap through Lake Winnepesaukee was clarified (no change).
with Belknapno change
29 June 1841 · N.H. Laws 1841, ch. 621, sec. 1/pp. 547-548
1849
Gained territory Carroll gained from Belknap when town of Wolfeboro gained from town of Alton.
from Belknap
27 June 1849 · N.H. Laws 1849, ch. 859, sec. 1/p. 402
1853
Gained territory Carroll gained towns of Bartlett and Jackson and the gore of Hart's Location from Coos. Hale's Location remained part of Coos, although it was surrounded by Carroll.
from Coos
5 January 1853 · N.H. Laws 1853, ch. 1290, sec. 1/p. 1230
1853
Gained territory Carroll gained the gore of Hale's Location from Coos.
from Coos
22 June 1853 · N.H. Laws 1853, ch. 1425, sec. 1/p. 1348
1864
Gained territory Carroll gained from Grafton when town of Sandwich gained small area from town of Waterville.
from Grafton
16 July 1864 · N.H. Laws 1864, ch. 2891, sec. 1/p. 2850
1897
Boundary clarified Boundary between Carroll and Belknap through Lake Winnepesaukee was clarified.
with Belknapno change
23 March 1897 · N.H. Laws 1897-1898, ch. 199, sec. 1/pp. 197-198

Land and parcels

What the maps cover in Carroll

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

Parcels Good enough

Lot lines and tax-map numbers for 52,944 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 Carroll 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

Carroll by the Census

Population

50,107 2020 Census count

Housing units

39,670 2020 Census count

Land area

932 square miles

Water area

62 square miles

People per sq mi

54 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

Carroll 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 Carroll County.
carrollcountynh.net

See your own lot on these maps

Open Carroll 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 Carroll County

When was Carroll County founded?: Carroll County was founded in 1841, formed from Strafford County, and named after Charles Carroll of Carrollton.
What is the county seat of Carroll County?: The county seat of Carroll County is Ossipee.
Is there an online parcel map for Carroll County?: Yes. New Hampshire Geographic Information System Clearinghouse (GRANIT) publishes a parcel map of 52,944 parcels, rated good enough here. You can click any parcel on it in Parcel Chart's free map, no sign-in needed.
Has Carroll County's boundary or name changed?: Carroll County was created in 1841 from Strafford County. Since then the Atlas of Historical County Boundaries records 4 later changes, chiefly involving Coos County, Belknap County and Grafton County.
Is my lot in a flood zone?: We do not have flood maps for Carroll County yet. Look up the address on FEMA's Flood Map Service Center, which shows the effective flood map for any lot.

Nearby