When was Harrison County founded?

Harrison County was founded in 1784, formed from Monongalia County, and named after Benjamin Harrison V.

What is the county seat of Harrison County?

The county seat of Harrison County is Clarksburg.

Is there an online parcel map for Harrison County?

Yes. West Virginia University GIS Technical Center publishes a parcel map of 55,116 parcels, rated good enough here. You can click any parcel on it in Parcel Chart's free map, no sign-in needed.

Has Harrison County's boundary or name changed?

Harrison County was created in 1784 from Monongalia County. Since then the Atlas of Historical County Boundaries records 13 later changes, chiefly involving Randolph County, Taylor County and Barbour County.

Is my lot in a flood zone?

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

County · code 54033

Harrison CountyWest Virginia

Harrison County is in West Virginia with its county seat in Clarksburg. It was created in 1784 from Monongalia County and named after Benjamin Harrison V.

Founded1784
County seatClarksburg
Named forBenjamin Harrison V
Land area416 sq mi + 0.5 sq mi water
Population65,921 2020 Census
Parcels mapped55,116 checked 16 October 2026

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

Updated 20 October 2026

Census outline · seat marked

History

Formed in 1784 from Monongalia County

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

Harrison County was created by Virginia from Monongalia County on July 20, 1784. Over the following decades, parts of the county were lost to the creation of Randolph, Wood, Lewis, Marion, Ritchie, and Barbour counties, while it gained territory from Monongalia, Randolph, and Ohio counties. On June 20, 1863, Harrison County separated from Virginia and became a county in the state of West Virginia.

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

1784
Harrison County created Harrison created by Virginia from Monongalia.
from Monongalia
20 July 1784 · Hening, 11:366-368
1787
Lost territory Harrison lost to creation of Randolph.
to Randolph
1 May 1787 · Hening, 12:393-395
1799
Lost territory Harrison lost to creation of Wood.
to Wood
1 May 1799 · Shepherd, 2:170-171
1800
Gained territory Harrison gained from Monongalia.
from Monongalia
1 January 1800 · Shepherd, 2:203
1863
Became part of West Virginia Harrison separated from Virginia and became a county in the state of West Virginia. 20 June 1863 · Swindler, 10:363

Show all 15 changes (10 more)

1784
Harrison County created Harrison created by Virginia from Monongalia.
from Monongalia
20 July 1784 · Hening, 11:366-368
1787
Lost territory Harrison lost to creation of Randolph.
to Randolph
1 May 1787 · Hening, 12:393-395
1799
Lost territory Harrison lost to creation of Wood.
to Wood
1 May 1799 · Shepherd, 2:170-171
1800
Gained territory Harrison gained from Monongalia.
from Monongalia
1 January 1800 · Shepherd, 2:203
1802
Gained territory Harrison gained from Randolph.
from Randolph
2 January 1802 · Shepherd, 2:345-346
1805
Gained territory Harrison gained from Ohio.
from Ohio
1 May 1805 · Shepherd, 3:174-175
1816
Lost territory Harrison lost to creation of Lewis.
to Lewis
18 December 1816 · Va. Acts 1816-1817, ch. 85, sec. 1/pp. 152-153
1842
Lost territory Harrison lost to creation of Marion.
to Marion
14 January 1842 · Va. Acts 1841-1842, ch. 59, sec. 1/pp. 34-36
1843
Lost territory Harrison lost to creation of Ritchie.
to Ritchie
18 February 1843 · Va. Acts 1842-1843, ch. 52, sec. 1/pp. 35-37
1843
Lost territory Harrison lost to creation of Barbour.
to Barbour
3 March 1843 · Va. Acts 1842-1843, ch. 53, sec. 1/pp. 37-40
1844
Lost territory Harrison lost to creation of Taylor.
to Taylor
19 January 1844 · Va. Acts 1843-1844, ch. 44, sec. 1/pp. 34-37
1845
Lost territory Harrison lost to creation of Doddridge.
to Doddridge
4 February 1845 · Va. Acts 1844-1845, ch. 42, sec. 1/pp. 42-45
1863
Became part of West Virginia Harrison separated from Virginia and became a county in the state of West Virginia. 20 June 1863 · Swindler, 10:363
1863
Lost territory Harrison lost small area to Taylor to accommodate local landowners.
to Taylor
9 October 1863 · W. Va. Acts 1863, 1st sess., ch. 62, sec. 1/p. 60
1871
Boundary clarified Boundary between Harrison and Barbour clarified (no change).
with Barbourno change
16 February 1871 · W. Va. Acts 1871, 9th sess., ch. 49, sec. 1/p. 68

Land and parcels

What the maps cover in Harrison

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

Parcels Good enough

Lot lines and tax-map numbers for 55,116 parcels from West Virginia University GIS Technical Center. Drawn for tax purposes: usually within a few feet of a survey, but not a survey.
checked 16 October 2026
Address points Official

One point per address, 35,639 in all from WV GIS Technical Center (WVGISTC, West Virginia University — the state's GIS clearinghouse) serving WV Division of Homeland Security and Emergency Management (WVDHSEM) SAMS-II address points.
checked 13 October 2026
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

Harrison by the Census

Population

65,921 2020 Census count

Housing units

30,480 2020 Census count

Land area

416 square miles

Water area

0.5 square miles

People per sq mi

158 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

Harrison County's official site

We have found the county's site but not its offices yet; start there.

County government

County government
The official website of Harrison County.
harrisoncountywv.com

See your own lot on these maps

Open Harrison 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 Harrison County

When was Harrison County founded?: Harrison County was founded in 1784, formed from Monongalia County, and named after Benjamin Harrison V.
What is the county seat of Harrison County?: The county seat of Harrison County is Clarksburg.
Is there an online parcel map for Harrison County?: Yes. West Virginia University GIS Technical Center publishes a parcel map of 55,116 parcels, rated good enough here. You can click any parcel on it in Parcel Chart's free map, no sign-in needed.
Has Harrison County's boundary or name changed?: Harrison County was created in 1784 from Monongalia County. Since then the Atlas of Historical County Boundaries records 13 later changes, chiefly involving Randolph County, Taylor County and Barbour County.
Is my lot in a flood zone?: We do not have flood maps for Harrison County yet. Look up the address on FEMA's Flood Map Service Center, which shows the effective flood map for any lot.

Nearby