As of the census of 2000, there were 33,047 people, 10,159 households, and 8,096 families residing in the county. The population density was 124 people per square mile (48/km²). There were 10,726 housing units at an average density of 40 per square mile (16/km²). The racial makeup of the county was 60.93% White, 32.54% Black or African American, 0.42% Native American, 1.73% Asian, 0.15% Pacific Islander, 2.19% from other races, and 2.03% from two or more races. 4.92% of the population were Hispanic or Latino of any race.
There were 10,159 households out of which 41.90% had children under the age of 18 living with them, 63.50% were married couples living together, 12.20% had a female householder with no husband present, and 20.30% were non-families. 17.20% of all households were made up of individuals and 5.80% had someone living alone who was 65 years of age or older. The average household size was 2.76 and the average family size was 3.11.
In the county, the population was spread out with 25.10% under the age of 18, 13.60% from 18 to 24, 33.30% from 25 to 44, 20.80% from 45 to 64, and 7.30% who were 65 years of age or older. The median age was 32 years. For every 100 females there were 117.00 males. For every 100 females age 18 and over, there were 120.90 males.
The median income for a household in the county was $49,877, and the median income for a family was $53,750. Males had a median income of $37,363 versus $26,347 for females. The per capita income for the county was $20,196. About 6.50% of families and 8.00% of the population were below the poverty line, including 11.40% of those under age 18 and 8.30% of those age 65 or over.
Interstate Highways 95 and 295 pass through the county, as does north-south U.S. Route 301 and east-west U.S. Route 460. State Route 10 runs along the northern shore of the James River near several of the James River plantations located in the county.
Freight railroad service for the county is provided by CSX Transportation, which interchanges with Norfolk Southern at Petersburg. The famous 52-mile long tangent rail line between Petersburg and Suffolk of the former Norfolk and Petersburg Railroad was built by William Mahone in the 1850s, and now forms a vital link of the Norfolk Southern system. A Norfolk Southern Railway automobile transloading facility is located nearby. There are future plans underway for a large Intermodal freight transport railroad-trucking transfer facility in Prince George County as well.