Major highways

• U.S. Route 48
• U.S. Route 50
• U.S. Route 220
• West Virginia Route 28
• West Virginia Route 42
• West Virginia Route 55
• West Virginia Route 93

Adjacent counties

• Mineral County (northeast)
• Hardy County (east)
• Pendleton County (south)
• Randolph County (southwest)
• Tucker County (west)
• Preston County (northwest)
• Garrett County, Maryland (northwest)

National protected areas

• Monongahela National Forest (part)
• Spruce Knob–Seneca Rocks National Recreation Area (part)

2020 census

As of the 2020 census, there were 10,976 people and 4,147 households residing in the county. There were 5,598 housing units in Preston. The racial makeup of the county was 95.6% White, 0.8% African American, 0.2% Asian, 0.2% Native American, 0.5% from other races, and 2.8% from two or more races. Hispanics or Latinos of any race were 0.8% of the population.

Of the 12,510 households, 48.9% were married couples living together, 24.3% had a female householder with no spouse present, 23.1% had a male householder with no spouse present. The average household and family size was 3.49. The median age in the county was 46.3 years with 19.6% of the population under 18. The median income for a household was $47,224 and the poverty rate was 12.1%.^[13]

2010 census

As of the 2010 United States census, there were 11,937 people, 4,941 households, and 3,435 families living in the county.^[14] The population density was 25.0 inhabitants per square mile (9.7/km²). There were 6,366 housing units at an average density of 13.3 units per square mile (5.1 units/km²).^[15] The racial makeup of the county was 97.7% white, 0.7% black or African American, 0.2% Asian, 0.2% American Indian, 0.5% from other races, and 0.9% from two or more races. Those of Hispanic or Latino origin made up 1.0% of the population.^[14] In terms of ancestry, 26.9% were German, 15.0% were American, 9.3% were Irish, and 5.3% were English.^[16]

Of the 4,941 households, 29.3% had children under the age of 18 living with them, 56.3% were married couples living together, 8.3% had a female householder with no husband present, 30.5% were non-families, and 25.7% of all households were made up of individuals. The average household size was 2.39 and the average family size was 2.84. The median age was 44.0 years.^[14]

The median income for a household in the county was $35,593 and the median income for a family was $46,193. Males had a median income of $35,000 versus $24,643 for females. The per capita income for the county was $19,358. About 10.6% of families and 12.9% of the population were below the poverty line, including 15.0% of those under age 18 and 12.8% of those age 65 or over.^[17]

2000 census

As of the census of 2000, there were 11,299 people, 4,591 households, and 3,273 families living in the county. The population density was 24 people per square mile (9.3 people/km²). There were 6,105 housing units at an average density of 13 units per square mile (5.0 units/km²). The racial makeup of the county was 98.33% White, 0.67% Black or African American, 0.26% Indigenous American, 0.14% Asian, 0.02% Pacific Islander, 0.13% from other races, and 0.45% from two or more races. 0.55% of the population were Hispanic or Latino of any race.

There were 4,591 households, out of which 30.20% had children under the age of 18 living with them, 59.50% were married couples living together, 8.20% had a female householder with no husband present, and 28.70% were non-families. 24.50% of all households were made up of individuals, and 11.30% had someone living alone who was 65 years of age or older. The average household size was 2.43 and the average family size was 2.87.

In the county, the population was spread out, with 22.70% under the age of 18, 7.80% from 18 to 24, 27.50% from 25 to 44, 26.80% from 45 to 64, and 15.30% who were 65 years of age or older. The median age was 39 years. For every 100 females there were 97.70 males. For every 100 females age 18 and over, there were 94.50 males.

The median income for a household in the county was $28,916, and the median income for a family was $33,813. Males had a median income of $24,796 versus $18,354 for females. The per capita income for the county was $15,696. About 12.60% of families and 16.30% of the population were below the poverty line, including 21.00% of those under age 18 and 18.70% of those age 65 or over.

City

• Petersburg (county seat)

Town

• Bayard

Magisterial districts

• Grant
• Milroy
• Union

Unincorporated communities

Federal Politics

Grant County lies within West Virginia's 2nd congressional district. The current representative of the district is Alex Mooney (R).

Politically, Grant County was historically a major outlier in West Virginia. While the rest of the state did not become a Republican bastion until the 21st century after having leaned heavily Democratic between the New Deal and Bill Clinton’s presidency, Grant County has always been among the most strongly Republican counties in the country. Since Grant County was created in 1866, no Democrat has managed to receive 40 percent of the county's vote in any Presidential election. The only Republican to ever lose Grant County has been William Howard Taft in 1912 when the GOP was divided and Progressive Theodore Roosevelt claimed the majority of the county's vote.

The county's Republican bent has held even in national Democratic landslides. Franklin Delano Roosevelt never tallied more than 26.8 percent of the vote in any of his four successful campaigns, and Lyndon Johnson only managed 37.8 percent in 1964. Jimmy Carter is the only other Democrat besides LBJ to have cracked the 30 percent barrier.

Notably, in 2016 and 2020, Donald Trump received the highest percentage of the vote ever cast for a presidential candidate in this county, holding Democratic candidates Hillary Clinton and Joe Biden to 10% and 11% of the vote, respectively.

State Politics

At the state level, Grant County voted for popular Democratic governor Joe Manchin over his GOP opponent Russ Weeks by over 20 points in 2008.^[20]

Grant County is represented in one Senate district with two Senators in the West Virginia Senate. Senate members Senate members Jay Taylor (R) and Randy Smith (R) both serve in West Virginia's 14th Senate district.^[21] The county is represented in the West Virginia House of Delegates by one Delegate. The Delegate for Grant County is John Paul Hott (R) for district 85.^[22]

County government

Grant County's government consists the County Administrator and the County Commission. The County Administrator is the county executive that handles all administrative duties for and reports to the County Commission. The position of the Grant County Administrator is currently held by Michelle Sites.^[23]

The Grant County Commission consists of three members. The current members of the County Commission are Kevin P. Hagerty, Scotty Miley and Tyson Riggleman.^[24]