Barneveld is a hamlet (and census-designated place) located within the Town of Trenton in Oneida County, New York, United States. The population was 284 at the 2010 census, when it was an incorporated village. The name is derived from the name of the Dutch statesman Johan van Oldenbarnevelt (1547–1619).
Barneveld is located at 43°16′27″N 75°11′19″W / 43.27417°N 75.18861°W / 43.27417; -75.18861 (43.274087, -75.188710).
According to the United States Census Bureau, the village has a total area of 0.2 square miles (0.52 km), all of it land.
As of the census of 2000, there were 332 people, 126 households, and 87 families residing in the village. The population density was 1,749.7 people per square mile (674.7/km²). There were 132 housing units at an average density of 695.7 per square mile (268.2/km²). The racial makeup of the village was 97.59% White, 0.90% African American, 0.30% Asian, 0.90% from other races, and 0.30% from two or more races. Hispanic or Latino of any race were 0.30% of the population.
There were 126 households out of which 38.1% had children under the age of 18 living with them, 52.4% were married couples living together, 10.3% had a female householder with no male present, and 30.2% were non-families. 27.8% of all households were made up of individuals and 7.1% had someone living alone who was 65 years of age or older. The average household size was 2.63 and the average family size was 3.24.
In the village, the population was spread out with 31.3% under the age of 18, 7.5% from 18 to 24, 26.2% from 25 to 44, 25.3% from 45 to 64, and 9.6% who were 65 years of age or older. The median age was 36 years. For every 100 females, there were 98.8 males. For every 100 females age 18 and over, there were 96.6 males.
The median income for a household in the village was $41,071, and the median income for a family was $50,000. Males had a median income of $31,458 versus $26,667 for females. The per capita income for the village was $19,459. About 3.7% of families and 4.8% of the population were below the poverty line, including none of those under the age of eighteen or sixty-five or over.