Russellton is a census-designated place (CDP) in Allegheny County, Pennsylvania, United States. The population was 1,440 at the 2010 census.
Russellton is located at 40°36′39″N 79°50′13″W (40.610886, -79.837056).
According to the United States Census Bureau, the CDP has a total area of 1.4 square miles (3.7 km2), all of it land.
Russellton was really at one point two towns, Russellton #1 and Russellton #2, named after the mines that were in each area. Russellton #1 was originally Grays Mill; the name changed about 1907.
At the 2000 census there were 1,530 people, 616 households, and 450 families living in the CDP. The population density was 1,065.3 people per square mile (410.2/km2). There were 645 housing units at an average density of 449.1/sq mi (172.9/km2). The racial makeup of the CDP was 98.17% White, 0.39% African American, 0.13% Native American, 0.52% Asian, and 0.78% from two or more races. Hispanic or Latino of any race were 0.65%.
There were 616 households, 29.9% had children under the age of 18 living with them, 56.7% were married couples living together, 12.7% had a female householder with no husband present, and 26.9% were non-families. 23.2% of households were made up of individuals, and 10.4% were one person aged 65 or older. The average household size was 2.48 and the average family size was 2.94.
The age distribution was 22.3% under the age of 18, 6.6% from 18 to 24, 28.8% from 25 to 44, 27.5% from 45 to 64, and 14.8% 65 or older.