Pine River is a town in Lincoln County, Wisconsin, United States. The population was 1,877 at the 2000 census. The unincorporated community of Pine River is located in the town. According to the United States Census Bureau, the town has a total area of 64.3 square miles (166.4 km²), of which, 64.0 square miles (165.6 km²) of it is land and 0.3 square miles (0.8 km²) of it (0.47%) is water. As of the census of 2000, there were 1,877 people, 673 households, and 565 families residing in the town. The population density was 29.3 people per square mile (11.3/km²). There were 724 housing units at an average density of 11.3 per square mile (4.4/km²). The racial makeup of the town was 98.51% White, 0.05% African American, 0.59% Asian, 0.05% from other races, and 0.80% from two or more races. Hispanic or Latino of any race was 0.43% of the population.
There were 673 households out of which 38.3% had children under the age of 18 living with them, 74.7% were married couples living together, 5.3% had a female householder with no husband present, and 15.9% were non-families. 12.3% of all households were made up of individuals and 3.4% had someone living alone who was 65 years of age or older. The average household size was 2.79 and the average family size was 3.04. In the town the population was spread out with 27.0% under the age of 18, 6.6% from 18 to 24, 32.0% from 25 to 44, 25.4% from 45 to 64, and 9.1% who were 65 years of age or older. The median age was 37 years. For every 100 females there were 107.4 males. For every 100 females age 18 and over, there were 107.7 males.
The median income for a household in the town was $47,723, and the median income for a family was $50,455. Males had a median income of $31,818 versus $22,628 for females. The per capita income for the town was $18,449. About 3.3% of families and 4.7% of the population were below the poverty line, including 6.3% of those under age 18 and 12.4% of those ages 65 or over.