As of the census of 2000, there were 118,227 people, 45,863 households, and 26,141 families residing in the county. The population density was 296 people per square mile (114/km²). There were 49,289 housing units at an average density of 123 per square mile (48/km²). The racial makeup of the county was 78.05% White, 13.79% Black or African American, 0.39% Native American, 4.10% Asian, 0.02% Pacific Islander, 1.96% from other races, and 1.71% from two or more races. 4.46% of the population were Hispanic or Latino of any race.
There were 45,863 households out of which 28.30% had children under the age of 18 living with them, 44.60% were married couples living together, 9.40% had a female householder with no husband present, and 43.00% were non-families. 28.10% of all households were made up of individuals and 6.10% had someone living alone who was 65 years of age or older. The average household size was 2.36 and the average family size was 2.95.
In the county, the population was spread out with 20.30% under the age of 18, 21.00% from 18 to 24, 29.90% from 25 to 44, 20.40% from 45 to 64, and 8.40% who were 65 years of age or older. The median age was 30 years. For every 100 females there were 90.10 males. For every 100 females age 18 and over, there were 86.70 males.
The median income for a household in the county was $42,372, and the median income for a family was $59,874. Males had a median income of $39,298 versus $31,328 for females. The per capita income for the county was $24,873. About 6.20% of families and 14.10% of the population were below the poverty line, including 9.00% of those under age 18 and 7.40% of those age 65 or over. Orange County has the second highest property tax rate in NC at 0.998 per $100 of valuation.