The village was incorporated in 1828.
The village is adjacent to the Black River.
Brownville is on New York State Route 12E and County Route 53.
There were 419 households out of which 32.5% had children under the age of 18 living with them, 55.8% were married couples living together, 10.0% had a female householder with no husband present, and 30.3% were non-families. 26.5% of all households were made up of individuals and 12.6% had someone living alone who was 65 years of age or older. The average household size was 2.44 and the average family size was 2.94.
In the village the population was spread out with 24.6% under the age of 18, 7.2% from 18 to 24, 25.6% from 25 to 44, 26.9% from 45 to 64, and 15.7% who were 65 years of age or older. The median age was 40 years. For every 100 females there were 85.8 males. For every 100 females age 18 and over, there were 83.6 males.
The median income for a household in the village was $37,500, and the median income for a family was $44,881. Males had a median income of $35,294 versus $25,583 for females. The per capita income for the village was $18,862. About 4.0% of families and 8.4% of the population were below the poverty line, including 10.3% of those under age 18 and 7.0% of those age 65 or over.