On March 15, 1781, the Battle of Guilford Court House was fought just north of present-day Greensboro between Generals Charles Cornwallis and Nathanael Greene during the American Revolution. This battle marked a key turning point in the Revolutionary War in the South. Although General Cornwallis, the British Commander, held the field at the end of the battle, his losses were so severe that he decided to withdraw to the Carolina and Virginia coastline, where he could receive reinforcements and his battered army could be protected by the British Navy. His decision ultimately led to his defeat later in 1781 at Yorktown, Virginia, by a combined force of American and French troops and warships.
In 1779 the southern third of Guilford County became Randolph County. In 1785 the northern half of its remaining territory became Rockingham County.
Many of the county's residents were opposed to slavery before the Civil War. The county was a stop on the famous Underground Railroad, which provided escaped slaves with a route to freedom in the North. Levi Coffin, one of the founders of the "railroad", was a Guilford County native. He is credited with personally helping over 2,000 slaves escape to freedom before the war.
In 1891, the county became home to the state's first and only publicly supported institution of higher learning for women, the State Normal and Industrial School. In 1932, the school became the Women's College of North Carolina when it joined with the University of North Carolina at Chapel Hill and NC State University in Raleigh to form the Consolidated University of North Carolina. From the 1930s to the 1960s the Women's College was the third-largest women's university in the world. The school's name was changed a final time in 1963 when it began admitting men; it is now known as the University of North Carolina at Greensboro.
In 1960 Guilford County helped spark a major development in the American civil rights movement when four black students from the North Carolina A&T State University in Greensboro started the first civil rights sit-in. Known afterwards as the Greensboro Four, the four men deliberately sat at a "whites-only" lunch counter at the Woolworth's store in downtown Greensboro and asked to be served. They were arrested, but their action led to many other college students in Greensboro - including white students from Guilford College and the Women's College - to sit at the lunch counter in a show of support. Within two months the sit-in movement spread to 54 cities in 9 states; Woolworth's eventually agreed to desegregate its lunch counters and other restaurants in Southern towns and cities followed suit. A darker racial incident in 1979 was called the Greensboro massacre. In this incident the predominantly African American Communist Workers Party (CWP) led a march protesting the Ku Klux Klan and other white-supremacist groups through a black neighborhood in southeastern Greensboro. They were attacked and shot at by the Ku Klux Klan and members of the American Nazi Party, several of the Communist Party marchers were killed or wounded in the attack. The case received further national publicity when the accused shooters were found "not guilty" by an all-white jury.
The county is drained, in part, by the Deep and Haw Rivers.
There were 168,667 households out of which 30.40% had children under the age of 18 living with them, 48.00% were married couples living together, 13.40% had a female householder with no husband present, and 34.90% were non-families. 27.90% of all households were made up of individuals and 8.30% had someone living alone who was 65 years of age or older. The average household size was 2.41 and the average family size was 2.96.
In the county the population was spread out with 23.70% under the age of 18, 11.00% from 18 to 24, 31.40% from 25 to 44, 22.10% from 45 to 64, and 11.80% who were 65 years of age or older. The median age was 35 years. For every 100 females there were 92.00 males. For every 100 females age 18 and over, there were 88.60 males.
The median income for a household in the county was $42,618, and the median income for a family was $52,638. Males had a median income of $35,940 versus $27,092 for females. The per capita income for the county was $23,340. About 7.60% of families and 10.60% of the population were below the poverty line, including 13.80% of those under age 18 and 9.90% of those age 65 or over.
Part of Archdale and Kernersville are in Guilford County