There are several factors to consider when calculating the population and steets of a town or city. The age of people living in a city should be taken into consideration, as the average age in Black River, NY is 38 years old. The city's median age includes both native and foreign-born residents. A chart illustrating the distribution of Black River, NY households by car ownership buckets may be helpful. The chart shows that the largest share of households in Black River, NY own two cars.
The Leyden brothers owned large tracts of land in Black River. The town's growth was largely due to their logwood trade. Black River's population grew considerably in the 18th century, and by the mid-nineteenth century, the city became the economic and transhipment center of St. Elizabeth. The city was also a significant slave trading port. Slaves were sold at the Farquharson Wharf, once the Town Wharf.
The city is home to a large population of Ho-Chunk people. A study by author Michael Lesy in 1973 highlighted the harshness of life in Black River Falls. The book was adapted into a movie in 1999, which included scenes from the city as it appeared then. In addition to historical information, the book has photos and newspaper clippings that depict the town's early years. It is also home to the Black River Falls Karner Blue butterfly. The Karner Blue Butterfly Festival is held annually on the third Saturday in July.