Allen Falls is a 35-foot waterfall on West Branch Saint Regis River in St. Lawrence County, New York, in the Eastern Great Lakes Lowlands region. It lies about 6.5 miles east of Potsdam and roughly 109.1 miles north of Utica as the crow flies.
At 35 feet it is on the modest side for New York, where the typical waterfall with a recorded height stands around 50.5 feet; it ranks 114th of 184.
The Eastern Great Lakes Lowlands are a rolling plain of farmland and mixed forest south of Lake Ontario and Lake Erie. Creeks cut gorges through layered limestone and shale, dropping over ledges in waterfalls, most famously along the Niagara Escarpment. West Branch Saint Regis River carries 6 recorded waterfalls, and Allen Falls is the tallest of them.
St. Lawrence County holds 58 recorded waterfalls, and several are close by. Whitaker Falls, a dam waterfall, is about 2.5 miles away. Hannawa Falls, is about 6.8 miles away. Lower Colton Falls, is about 8 miles away.
Allen Falls is located at 44.6558° N, 74.8495° W. The listing is based on the World Waterfall Database, one of the sources compiled by the U.S. Geological Survey in its inventory of waterfalls and rapids of the conterminous United States. The creek name is confirmed against the federal Geographic Names Information System. The position was verified on aerial imagery. Details on trails, parking and access have not been documented for this waterfall yet.