As of the census of 2000, there were 4,804 people, 1,967 households, and 1,335 families residing in the borough. The population density was 332.1 people per square mile (128.2/km²). There were 2,193 housing units at an average density of 151.6/sq mi (58.5/km²). The racial makeup of the borough was 98.36% White, 0.62% African American, 0.04% Native American, 0.27% Asian, 0.04% Pacific Islander, 0.04% from other races, and 0.62% from two or more races. Hispanic or Latino of any race were 0.83% of the population. A plurality of Jim Thorpe's residents are of Irish descent, typified by the connection to the Molly Maguires and large amount of Irish pride seen throughout the town (e.g. flags).
There were 1,967 households of which 28.2% had children under the age of 18, 50.6% were married couples living together, 12.3% had a female householder with no husband present, and 32.1% were non-families. 27.1% of all households were made up of individuals and 13.4% had someone living alone who was 65 years of age or older. The average household size was 2.42 and the average family size was 2.93.
In the borough the population was spread out with 21.0% under the age of 18, 8.2% from 18 to 24, 28.8% from 25 to 44, 24.9% from 45 to 64, and 17.1% who were 65 years of age or older. The median age was 41 years. For every 100 females there were 95.4 males. For every 100 females age 18 and over, there were 91.9 males.
The median income for a household in the borough was $35,976, and the median income for a family was $43,710. Males had a median income of $31,141 versus $23,490 for females. The per capita income for the borough was $17,119. About 7.8% of families and 10.0% of the population were below the poverty line, including 18.3% of those under age 18 and 6.8% of those age 65 or over.