The Porcupine Hills Formation is a stratigraphic unit of middle to late Paleocene age in the Western Canada Sedimentary Basin.

It takes its name from the Porcupine Hills of southwestern Alberta, and was first described in outcrop by George Mercer Dawson in 1883.

The sediments were derived from the Canadian Cordillera during tectonic uplift and erosion in the late stages of the Laramide Orogeny, and were transported eastward by river systems and deposited in fluvial and floodplain environments.

[3] The mudstones are characterized by well-developed paleosols and caliche nodules, and the sandstones are cross-bedded and cemented with calcite.

Its base is a thick sandstone that rests disconformably on a paleosol horizon of the underlying Willow Creek Formation.