Beaver Falls is a hamlet in the town of Croghan, west of the village of Croghan, in Lewis County, New York, United States. The hamlet had a population of around 500 in 2007. The hamlet is split into two sections divided by the Beaver River, which flows down from the village of Croghan. Three bridges cross the river, two vehicle bridges at the upper and lo…Beaver Falls is a hamlet in the town of Croghan, west of the village of Croghan, in Lewis County, New York, United States. The hamlet had a population of around 500 in 2007. The hamlet is split into two sections divided by the Beaver River, which flows down from the village of Croghan. Three bridges cross the river, two vehicle bridges at the upper and lower ends of the hamlet, and a third railway trestle that crosses the river in the center. Main Street, once a busy district during the early 20th century, is now the site of Beaver River Central School, a blacktop business, Beaver Falls Health Clinic, the post office, two churches, a deli, a pizza restaurant and a town park, as well as the Omniafiltra plant, the Beaver Falls Library and the Beaver Falls Volunteer Fire Department.