When was Marion County founded?

Marion County was founded in 1842, formed from Harrison County and Monongalia County, and named after Francis Marion.

What is the county seat of Marion County?

The county seat of Marion County is Fairmont.

Is there an online parcel map for Marion County?

Yes. West Virginia University GIS Technical Center publishes a parcel map of 39,542 parcels, rated good enough here. You can click any parcel on it in Parcel Chart's free map, no sign-in needed.

Has Marion County's boundary or name changed?

Marion County was created in 1842 from Harrison County and Monongalia County. Since then the Atlas of Historical County Boundaries records 3 later changes, chiefly involving Taylor County.

Is my lot in a flood zone?

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

County · code 54049

Marion CountyWest Virginia

Marion County is a county in West Virginia with its seat in Fairmont, formed in 1842.

Founded1842
County seatFairmont
Named forFrancis Marion
Land area309 sq mi + 2.8 sq mi water
Population56,205 2020 Census
Parcels mapped39,542 checked 16 October 2026

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

Updated 20 October 2026

Census outline · seat marked

History

Formed in 1842 from Harrison County and Monongalia County

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

Marion County was created by Virginia in 1842 from Harrison and Monongalia counties. It was named after Francis Marion. Marion separated from Virginia and became a county in West Virginia on June 20, 1863.

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

1842
Marion County created Marion created by Virginia from Harrison and Monongalia.
from Harrison from Monongalia
14 January 1842 · Va. Acts 1841-1842, ch. 59, sec. 1/pp. 34-36
1843
Boundary clarified Boundaries of Marion clarified (no change).
no change
24 March 1843 · Va. Acts 1842-1843, ch. 55, sec. 1/p. 40
1844
Lost territory Marion lost to creation of Taylor.
to Taylor
19 January 1844 · Va. Acts 1843-1844, ch. 44, sec. 1/pp. 34-37
1847
Boundary clarified Boundary between Marion and Monongalia clarified (no change).
with Monongaliano change
15 March 1847 · Va. Acts 1846-1847, ch. 58, sec. 1/p. 57
1856
Lost territory Marion lost to Taylor.
to Taylor
20 February 1856 · Va. Acts 1855-1856, ch. 113, sec. 1/p. 98
1863
Became part of West Virginia Marion separated from Virginia and became a county in the state of West Virginia. 20 June 1863 · Swindler, 10:363

Land and parcels

What the maps cover in Marion

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

Parcels Good enough

Lot lines and tax-map numbers for 39,542 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, 27,910 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

Marion by the Census

Population

56,205 2020 Census count

Housing units

26,280 2020 Census count

Land area

309 square miles

Water area

2.8 square miles

People per sq mi

182 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

Marion 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 Marion County.
marioncountywv.com

See your own lot on these maps

Open Marion 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 Marion County

When was Marion County founded?: Marion County was founded in 1842, formed from Harrison County and Monongalia County, and named after Francis Marion.
What is the county seat of Marion County?: The county seat of Marion County is Fairmont.
Is there an online parcel map for Marion County?: Yes. West Virginia University GIS Technical Center publishes a parcel map of 39,542 parcels, rated good enough here. You can click any parcel on it in Parcel Chart's free map, no sign-in needed.
Has Marion County's boundary or name changed?: Marion County was created in 1842 from Harrison County and Monongalia County. Since then the Atlas of Historical County Boundaries records 3 later changes, chiefly involving Taylor County.
Is my lot in a flood zone?: We do not have flood maps for Marion County yet. Look up the address on FEMA's Flood Map Service Center, which shows the effective flood map for any lot.

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