Little Falls is a small waterfall along the Passaic River in the town of the same name. The name Little Falls is fitting, as it looks more like a rapid on the major Passaic River than an actual waterfall. Directly above the waterfall is a dam, which is commonly mistaken for Little Falls itself.

Despite having a town named after it, visiting the waterfall is actually somewhat difficult. Union Boulevard crosses the Passaic River just below the waterfall, and it is visible from the bridge. Unfortunately, Union Boulevard has no parking, and the nearest parking areas are reserved for residents of private companies. Downtown Little Falls on Main Street does have public parking, and visitors can walk to the waterfall from there.

The only viewing area is from the bridge itself. The area on the banks of the Passaic River area either private apartments or owned by the Passaic Valley Water Commission.

Little Falls marks the location where the Passaic River crosses the Second Watchung Mountain basalt. A short distance downstream, the much larger Great Falls of the Passaic crosses a similar geologic location at the First Watchung Mountain basalt. Despite being almost identical geologically, Little Falls is limited in size by the height of the crest of the Great Falls. The base of Little Falls can not be less than the crest of the Great Falls.