The first European settlement in the interior of North Carolina and what became the United States was made by Spanish in 1567, when they built Fort San Juan at the large Native American settlement of Joara near present-day Morganton. They renamed the settlement Cuenca. In 1568 the natives killed the Spanish and burned the fort. The Spanish never returned to this area, and it was centuries before the next Europeans tried to settle there.
Burke County is part of the Hickory–Lenoir–Morganton Metropolitan Statistical Area.
As of the census of 2000, there were 89,148 people, 34,528 households, and 24,342 families residing in the county. The population density was 176 people per square mile (68/km²). There were 37,427 housing units at an average density of 74 per square mile (29/km²). The racial makeup of the county was 86.01% White, 6.71% Black or African American, 0.30% Native American, 3.48% Asian, 0.21% Pacific Islander, 2.17% from other races, and 1.11% from two or more races. 3.57% of the population were Hispanic or Latino of any race.
There were 34,528 households out of which 31.00% had children under the age of 18 living with them, 54.90% were married couples living together, 11.00% had a female householder with no husband present, and 29.50% were non-families. 25.50% of all households were made up of individuals and 9.90% had someone living alone who was 65 years of age or older. The average household size was 2.48 and the average family size was 2.94.
In the county the population was spread out with 24.00% under the age of 18, 8.90% from 18 to 24, 29.60% from 25 to 44, 24.00% from 45 to 64, and 13.40% who were 65 years of age or older. The median age was 37 years. For every 100 females there were 100.00 males. For every 100 females age 18 and over, there were 97.70 males.
The median income for a household in the county was $35,629, and the median income for a family was $42,114. Males had a median income of $27,591 versus $21,993 for females. The per capita income for the county was $17,397. About 8.00% of families and 10.70% of the population were below the poverty line, including 13.60% of those under age 18 and 12.50% of those age 65 or over.