As of the census of 2000, there were 63,303 people, 25,726 households, and 17,056 families residing in the county. The population density was 73 people per square mile (28/km²). There were 34,852 housing units at an average density of 40 per square mile (15/km²). The racial makeup of the county was 97.48% White, 0.62% Black or African American, 0.21% Native American, 0.55% Asian, 0.01% Pacific Islander, 0.23% from other races, and 0.91% from two or more races. Hispanic or Latino of any race were 1.05% of the population. 17.9% were of Irish, 12.7% English, 11.4% Italian, 11.1% French, 10.6% German and 9.0% American ancestry according to Census 2000. 96.3% spoke English, 1.4% Spanish and 1.0% French as their first language.
There were 25,726 households out of which 30.70% had children under the age of 18 living with them, 51.90% were married couples living together, 10.40% had a female householder with no husband present, and 33.70% were non-families. 27.30% of all households were made up of individuals and 11.30% 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 2.93.
In the county the population was spread out with 24.00% under the age of 18, 7.50% from 18 to 24, 28.20% from 25 to 44, 25.10% from 45 to 64, and 15.20% who were 65 years of age or older. The median age was 39 years. For every 100 females there were 94.20 males. For every 100 females age 18 and over, there were 91.00 males.
The median income for a household in the county was $39,198, and the median income for a family was $46,793. Males had a median income of $32,922 versus $22,279 for females. The per capita income for the county was $20,727. About 7.20% of families and 9.70% of the population were below the poverty line, including 14.10% of those under age 18 and 5.90% of those age 65 or over.
Regular bus service from Queensbury to Glens Falls is provided by the Greater Glens Falls Transit System. These also include trolleys that run on the road. The trolleys go from Bolton Landing (four times a day) and usually turn around just north of Hearthstone Point Campground on Route 9N.
There are several state and county maintained roads in Warren County, making up a total of 1,246 miles (2,005 km) of roadway. The only U.S. Route is U.S. Route 9, which traverses the eastern portion of the county. The only interstate is Interstate 87, also known as the Adirondack Northway.
Only New York State Route 9N traverses the Lake Luzerne region of Warren County. There are 2 state-maintained routes in Glens Falls, Route 9L, which terminates in the city. The second is New York State Route 32, which leaves Warren for Washington County, where it terminates at New York State Route 196. Also, on the east side of the city, there is County Route 79 (Boulevard), a former alignment of NY 32. There is New York State Route 149, a 32 miles (51 km) long road that traverses Warren and nearby Washington Counties. There is also New York State Route 254, a 6 miles (9.7 km) road in southern part of the town and enters Washington County as well. The third and final state maintained route is New York State Route 9L, which traverses down the central portion of the town. Several county routes traverse through Stony Creek. These include County Route 3, County Route 12, County Route 22, and County Route 76.
There are several major routes in the town and village of Lake George. There is New York State Route 9N, which traverses north to south through the county. There is also County Routes 6 (Fort George Boulevard) and 59 (Bloody Pond Road). The latter is a continuation of New York State Route 9L and heads to terminate in Queensbury. In this town includes New York State Route 912Q, which is the Exit 22 connector/park & ride on the Northway.
Although the region for Bolton and Bolton Landing is large, there is only one state-maintained route, Route 9N, and there is County Route 11 (Bolton-Riverbank Road), which is a connector to Exit 24 on the Northway. Only 2 county or higher maintained roads traverse the hamlet of Diamond Point, Route 9N and County Route 35 (Diamond Point Road), which connects 9N to the Northway (Exit 23) and U.S. Route 9 in Warrensburg. New York State Route 8 enters the county at Johnsburg, NY, entering into the Town of Chester, where it merges with U.S. Route 9 for almost 4 miles, splitting off at the Landon Hill/Route 8/Route 9 intersection. New York State Route 8 terminates at an intersection with New York State Route 9N in the center of Hague. There are several state-maintained and county-maintained roads in the Warrensburg area. These include the termini of both New York State Route 28 and New York State Route 418 at US 9. There are also a few county routes including County Route 4 in Athol and County Route 10 (Horicon Road) in Warrensburg. Route 10 continues eastward, terminating in Bolton Landing.
Amtrak serves Glens Falls on its Adirondack daily route.