According to the U.S. Census Bureau, the county has a total area of 757.62 square miles (1,962.2 km), of which 699.00 square miles (1,810.4 km) is land and 58.62 square miles (151.8 km) (7.74%) is water. The largest body of water is Lake Murray, while other waterways include the Broad River, the Saluda River and the Congaree River. Lexington County has urban, suburban, and rural landscapes. Much of the county's urbanization is in its eastern and northeastern areas. The elevation in the county is 392 feet (119 m).

Climate

Lexington County averages 47 inches (1,200 mm) of rain per year; the U.S. average is 38 inches (970 mm). The average snowfall is 1 inch (25 mm); the U.S. average is 28 inches (710 mm). The average number of days with any measurable precipitation is 103.

On average, there are 218 sunny days per year in Lexington County. The July high is around 92.3 °F (33.5 °C) and the January low is 33.2 °F (0.7 °C). The comfort index rates the county a 7.3 out of 10, where higher is more comfortable. The U.S. average on the comfort index is a 7 out of 10.

State and local protected areas

• Congaree Creek Heritage Preserve
• Lake Murray Dam North Recreational Area
• Peachtree Rock Heritage Preserve
• Saluda Shoals Park
• Shealy's Pond Heritage Preserve

Major water bodies

• Congaree River
• Lake Murray
• North Fork Edisto River
• Red Bank Creek
• Saluda River

Adjacent counties

• Richland County – east
• Orangeburg County – southeast
• Calhoun County – southeast
• Aiken County – southwest
• Saluda County – west
• Newberry County – northwest

Demographics

2020 census

As of the 2020 census, there were 293,991 people, 118,193 households, and 81,118 families residing in the county.

2010 census

At the 2010 census, there were 262,391 people, 102,733 households, and 70,952 families living in the county. The population density was 375.4 inhabitants per square mile (144.9 inhabitants/km). There were 113,957 housing units at an average density of 163.0 units per square mile (62.9 units/km). The racial makeup of the county was 79.3% white, 14.3% black or African American, 1.4% Asian, 0.4% American Indian, 2.7% from other races, and 1.9% from two or more races. Those of Hispanic or Latino origin made up 5.5% of the population. In terms of ancestry, 17.2% were German, 14.0% were American, 12.5% were English, and 11.8% were Irish.

Of the 102,733 households, 34.5% had children under the age of 18 living with them, 51.4% were married couples living together, 13.0% had a female householder with no husband present, 30.9% were non-families, and 24.9% of all households were made up of individuals. The average household size was 2.53 and the average family size was 3.01. The median age was 37.9 years.

The median income for a household in the county was $52,205 and the median income for a family was $64,630. Males had a median income of $44,270 versus $34,977 for females. The per capita income for the county was $26,393. About 8.5% of families and 11.1% of the population were below the poverty line, including 15.7% of those under age 18 and 8.4% of those age 65 or over.

2000 census

At the 2000 census, there were 216,014 people, 83,240 households, and 59,849 families living in the county. The population density was 309 people per square mile (119 people/km). There were 90,978 housing units at an average density of 130 units per square mile (50 units/km). The racial makeup of the county was 84.18% White, 12.63% Black or African American, 0.34% Native American, 1.05% Asian, 0.04% Pacific Islander, 0.79% from other races, and 0.98% from two or more races. 1.92% of the population were Hispanic or Latino of any race.

There were 83,240 households, out of which 35.50% had children under the age of 18 living with them, 56.60% were married couples living together, 11.60% had a female householder with no husband present, and 28.10% were non-families. 22.50% of all households were made up of individuals, and 6.90% had someone living alone who was 65 years of age or older. The average household size was 2.56 and the average family size was 3.01.

In the county, 26.10% of the population was under the age of 18, 8.30% was from 18 to 24, 31.60% from 25 to 44, 23.80% from 45 to 64, and 10.20% was 65 years of age or older. The median age was 36 years. For every 100 females, there were 94.50 males. For every 100 females age 18 and over, there were 91.30 males.

The median income for a household in the county was $44,659, and the median income for a family was $52,637. Males had a median income of $36,435 versus $26,387 for females. The per capita income for the county was $21,063. About 6.40% of families and 9.00% of the population were below the poverty line, including 11.10% of those under age 18 and 9.30% of those age 65 or over.

Law and government

Politics

Lexington County was one of the first areas of South Carolina to support the Republican Party. The last official Democratic candidate to carry the county at a presidential level was Franklin D. Roosevelt in 1944, and the official Democratic candidate last won 40 percent of the county's vote in 1952. It supported splinter Dixiecrat candidates in 1948 and 1956.

In the 2020 U.S. presidential election, Lexington County voted 64.2% in favor of Republican Donald Trump and 34.1% in favor of Democrat Joe Biden with 72.6% of the eligible electorate voting. This was the strongest performance by a Democratic candidate for president since 1976.

The county's Republican bent is not limited to national politics; its voters frequently reject Democrats at the state level as well. The county has supported the Republican candidate for governor in every election since 1982 when Richard Riley carried every county in the state. The last Democratic senatorial nominee to manage even 30 percent of the county's vote was Inez Tenenbaum in 2004, and no Democrat has carried the county since Ernest "Fritz" Hollings did so in 1980. In 1986, it was the only county in the state to support Hollings' Republican opponent, future Governor Henry McMaster. It was one of the first areas where Republicans broke the long Democratic monopoly on state and local offices; today, longtime state senator Nikki Setzler is the only elected Democrat above the county level.

On November 4, 2014, Lexington County residents voted against a proposed sales tax increase. The money generated from this tax would have mostly been used to improve traffic conditions upon roadways. That same day, residents voted to repeal a ban on alcohol sales on Sundays within the county.

Law enforcement

In 2015, long-time county sheriff James Metts pled guilty to charges of conspiring to harbor and conceal illegal aliens. Metts accepted bribes to keep undocumented immigrants out of federal databases. Metts had been sheriff since 1972.

Economy

In 2022, the GDP was $16.7 billion (about $53,814 per capita), and the real GDP was $13.8 billion (about $44,563 per capita) in chained 2017 dollars.

The Saxe Gotha Industrial Park near Cayce houses multiple distribution sites for major national companies, including Amazon, Chick-fil-A, The Home Depot and Nephron Pharmaceuticals. Near Lexington is the Michelin tire-production plant. Other manufacturers include Shaw Industries, Southeastern Freight Lines, and Flex, at which president Biden spoke in July 2023.

Top Employers

Transportation

Interstates

• I-20 Interstate 20 travels from west to east and connects Columbia to Atlanta and Augusta in the west and Florence in the east. It serves the nearby towns and suburbs of Pelion, Lexington, West Columbia, Sandhill, Pontiac, and Elgin. Interstate 20 is also used by travelers heading to Myrtle Beach, although the interstate's eastern terminus is in Florence.
• I-26 Interstate 26 travels from northwest to southeast and connects the Columbia area to the other two major population centers of South Carolina: the Greenville-Spartanburg area in the northwestern part of the state and North Charleston – Charleston area in the southeastern part of the state.
• I-77 Interstate 77 begins in Lexington county and ends in Cleveland, Ohio and is frequently used by travelers on the east coast heading to or from Florida.

U.S. Routes

• US 1
• 
  US 1 Conn.
• US 176
• US 178
• US 321
• US 378

State Routes

• SC 6
• 
  SC 6 Conn.
• SC 12
• 
  SC 12 Conn.
• SC 113
• SC 245
• SC 302
• SC 391
• SC 602

Columbia Metropolitan Airport

The Columbia Metropolitan Airport serves as the main airport system for the greater Columbia area. In 2018, the airport served 1,197,603 passengers with 12,324 flights. Additionally, the airport is also the regional hub for UPS Airlines, transporting 136.7 million pounds of freight/mail in 2018. The airport was named Lexington County Airport, and during World War II, trained pilots for B-25 Mitchell crews.

Public Transportation

Public transportation in Lexington County is provided by the COMET, or officially the Central Midlands Regional Transit Authority (CMRTA). The bus system is the main public transit system for the greater Columbia area. In Lexington County, the bus system runs in the areas of West Columbia, Cayce, Irmo, Springdale, Seven Oaks, and Harbison. Additionally, COMET offers Dial-a-ride transit (DART), which provides personalized service passengers with disabilities.

Education

Attractions

• Lake Murray
• Riverbanks Zoo
• Riverbanks Botanical Garden
• Riverbanks Waterfall Junction and waterpark
• Lexington County Museum
• Lake Murray Dam
• Lexington County Baseball Stadium
• Cayce-West Columbia Riverwalk
• Fourteen-mile Creek Trail
• Columbiana Centre

Communities

Cities

• Cayce (partly in Richland County)
• Columbia (mostly in Richland County)
• West Columbia

Towns

• Batesburg-Leesville
• Chapin (partly in Richland County and Newberry County)
• Gaston
• Gilbert
• Irmo (partly in Richland County)
• Lexington (county seat and largest community)
• Pelion
• Pine Ridge
• South Congaree
• Springdale
• Summit
• Swansea

Census-designated places

• Edmund
• Fairview Crossroads
• Oak Grove
• Red Bank
• Seven Oaks
• White Knoll

Ghost town

• Granby

Population ranking

The population ranking of the following table is based on the 2020 census of Lexington County.

† = county seat

Notable person

• Floyd Spence, former representative for South Carolina's 2nd congressional district

See also

• List of counties in South Carolina
• National Register of Historic Places listings in Lexington County, South Carolina
• Birch County, South Carolina, proposed county that would include existing portions of Lexington County