Limestone Falls (French: Chute du Calcaire) is series of waterfalls on the Caniapiscau River in Nunavik, Quebec, Canada. The falls are both the largest and tallest of a series of waterfalls on the Caniapiscau River, which includes the smaller but equally powerful Pyrite Falls located about 7 km (4.3 mi) upstream.

The flow of the falls has been regulated by the KA-3 Dam of the Caniapiscau Reservoir since its completion in 1985.

• List of waterfalls by flow rate
• List of waterfalls of Canada

• Amateur video of Limestone Falls, 30 August 2009