Laurens County is a county located in the U.S. state of South Carolina. As of the 2020 census, its population was 67,539. Its county seat is Laurens.
 Laurens County is included in the Greenville-Anderson-Greer, SC Metropolitan Statistical Area.
 Laurens County was formed on March 12, 1785. It was named after Henry Laurens, the fifth president of the Continental Congress.
 One of nine modern counties of the Colonial Ninety-Six District, Laurens County hosted more "official" (i.e. officially recognized and contemporaneously documented by competent governments) battles than did half of the original colonies. The Battle of Musgrove Mill was the first time during the American Revolution that regular soldiers of Great Britain were defeated in battle by militia.
 According to the U.S. Census Bureau, the county has a total area of 722.93 square miles (1,872.4 km2), of which 712.87 square miles (1,846.3 km2) is land and 10.06 square miles (26.1 km2) (1.39%) is water.
 As of the 2020 census, there were 67,539 people, 25,901 households, and 16,961 families residing in the county.
 At the 2010 census, there were 66,537 people, 25,525 households, and 17,707 families living in the county. The population density was 93.2 inhabitants per square mile (36.0/km2). There were 30,709 housing units at an average density of 43.0 per square mile (16.6/km2). The racial makeup of the county was 70.4% white, 25.4% black or African American, 0.3% Asian, 0.2% American Indian, 0.1% Pacific islander, 2.3% from other races, and 1.3% from two or more races. Those of Hispanic or Latino origin made up 4.1% of the population. In terms of ancestry, 11.8% were American, 9.8% were Irish, 9.6% were German, and 8.8% were English.
 Of the 25,525 households, 32.9% had children under the age of 18 living with them, 46.6% were married couples living together, 17.2% had a female householder with no husband present, 30.6% were non-families, and 26.1% of all households were made up of individuals. The average household size was 2.51 and the average family size was 3.00. The median age was 39.9 years.
 The median income for a household in the county was $37,529 and the median income for a family was $45,769. Males had a median income of $36,807 versus $26,799 for females. The per capita income for the county was $18,757. About 14.1% of families and 19.2% of the population were below the poverty line, including 31.0% of those under age 18 and 14.6% of those age 65 or over.
 At the 2000 census, there were 69,567 people, 26,290 households, and 18,876 families living in the county. The population density was 97 people per square mile (37 people/km2). There were 30,239 housing units at an average density of 42 per square mile (16/km2). The racial makeup of the county was 71.57% White, 26.23% Black or African American, 0.28% Native American, 0.15% Asian, 0.05% Pacific Islander, 0.95% from other races, and 0.78% from two or more races. 1.94% of the population were Hispanic or Latino of any race.
 There were 26,290 households, out of which 32.50% had children under the age of 18 living with them, 51.10% were married couples living together, 15.60% had a female householder with no husband present, and 28.20% were non-families. 24.60% of all households were made up of individuals, and 9.80% had someone living alone who was 65 years of age or older. The average household size was 2.55 and the average family size was 3.01.
 In the county, the population was spread out, with 25.30% under the age of 18, 9.20% from 18 to 24, 28.50% from 25 to 44, 23.80% from 45 to 64, and 13.20% who were 65 years of age or older. The median age was 36 years. For every 100 females, there were 93.60 males. For every 100 females age 18 and over, there were 89.70 males.
 The median income for a household in the county was $33,933, and the median income for a family was $39,739. Males had a median income of $30,402 versus $21,684 for females. The per capita income for the county was $15,761. About 11.60% of families and 14.30% of the population were below the poverty line, including 19.60% of those under age 18 and 13.50% of those age 65 or over.
 As of December 2017, the county unemployment rate was 4.4%.
 During the 1870 South Carolina gubernatorial election, Joseph Crews was a county election commissioner in Laurens County, and in that capacity had ordered all ballot boxes to be set up in the county seat. This disadvantaged rural voters, but enabled him and the state militia to oversee the election process and to mobilize black voters. However, armed whites attacked the black militia and disarmed them; some were wounded, others murdered. "Like companies of Confederate cavalry", "heavily armed whites" pushed away black voters—until Federal troops came from twenty miles away, with Crews, and took the ballot boxes. but was murdered by Democrats in the run-up to the 1876 South Carolina gubernatorial election.
 Until 1948, Laurens County was a Democratic Party stronghold similar to the rest of the Solid South, with Democratic presidential candidates receiving near-unanimous margins of victory in most years. The 20 years from 1948 to 1968 were a highly transitional time for the politics of South Carolina and Laurens County, largely in part due to the Democratic Party's increasing support for African-American civil rights and enfranchisement. South Carolinian Dixiecrat Strom Thurmond won the county in 1948, and Democrats won it back from 1952 to 1960. Barry Goldwater's opposition to the Civil Rights Act led the county to turn Republican for the first time in 1964, which it remained for Richard Nixon's two electoral victories. The county flipped to the Democratic column to support Jimmy Carter from neighboring Georgia in 1976 and 1980, the last Democrat to win the county. From 1984, the county has been consistently Republican in presidential elections, often by wide margins of victory.
 There are three public school districts in the county. Laurens County District 55 covers what is generally the northeastern half of the county while District 56 covers the southwestern half. The Ware Shoals area is covered by the multi-county Greenwood County District 51. There are two public high schools in the county: Laurens (in Dist. 55) and Clinton (in Dist. 56).
 Public K-12 education includes M. S. Bailey Child Development Center, Clinton Elementary, Eastside Elementary, E.B. Morse Elementary, Ford Elementary, Hickory Tavern Elementary, Joanna-Woodson Elementary, Gray Court-Owings Elementary & Middle, Clinton Middle, Hickory Tavern Middle, Laurens Middle, Sanders Middle, Clinton High, and Laurens District 55 High.
 Private K-12 education includes Laurens Academy, Summit Classical Charter School, and Thornwell Charter School.
 Presbyterian College, located in Clinton, is a four-year liberal-arts school founded in 1880.