The county was formed in 1841 from parts of Burke County and Wilkes County. It was named for Joseph Caldwell, presiding professor and the first president of the University of North Carolina. A series of reductions in the county's territory followed. In 1847 parts of Caldwell County, Iredell County, and Wilkes County were combined to form Alexander County. In 1849 parts of Caldwell County, Ashe County, Wilkes County, and Yancey County were combined to form Watauga County. In 1861, parts of Caldwell County, Burke County, McDowell County, Watauga County, and Yancey County were combined to form Mitchell County. Finally, in 1911 parts of Caldwell County, Mitchell County, and Watauga County were combined to form Avery County.
Geography
According to the U.S. Census Bureau, the county has a total area of, of which is land and is water. Caldwell County is divided into three distinct geographic sections: the Blue Ridge Mountains, which dominate the northern and western parts of the county; the gently rolling Piedmont country in the middle and southern parts of the county; and the Brushy Mountains, an isolated remnant of the Blue Ridge Mountains. The "Brushies", as they are often called, run across much of Caldwell County's eastern section. Hibriten Mountain, located within the city limits of Lenoir, the county's largest city, marks the western end of the Brushy Mountain range. In the western part of the county is the Wilson Creek area.
As of the census of 2010, there were 83,029 people, 33,388 households, and 23,456 families residing in the county. The population density was 176.1 people per square mile. There were 37,659 housing units at an average density of 79.9 per square mile. The racial makeup of the county was 90.24% White, 4.92% Black or African American, 0.52% Asian, 0.31% Native American, 0.03% Pacific Islander, 2.47% from other races, and 1.51% from two or more races. The Hispanic or Latino population was 4.57%. There were 33,388 households of which 32.40% had children under the age of 18 living with them, 52.16% were married couples living together, 12.52% had a female householder with no husband present, and 29.75% were non-families. 25.39% of all households were made up of individuals living alone and 41.16% of those households had someone living alone who was 65 years of age or older. The average household size was 2.46 and the average family size was 2.91. Of the county's entire population, 22.63% was under the age of 18, 18.33% were 18 to 34, 22.44% were 35 to 49, 21.17% were 50 to 64, and 15.44% were 65 years of age or older. The median age was 41.3 years. For every 100 females there were 96.84 males. For every 100 females age 18 and over, there were 95.06 males. The median income for a household in the county was $34,853, and the median income for a family was $47,028. Males had a median income of $36,429 versus $31,221 for females. The per capita income for the county was $19,397. About 15.3% of families and 20.50% of the population were below the poverty line, including 51.8% of single mothers and 13.2% of people age 65 or over.