Manuels River Formation

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| type = Formation

| age = {{Geological range|Middle Cambrian}}

| period = Cambrian

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| country = Canada

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| unitof = Harcourt GroupNormore, L. S. 2012: GEOLOGY OF THE RANDOM ISLAND MAP AREA (Nts 2C/04), Newfoundland. Current Research (2012) Newfoundland and Labrador Department of Natural Resources Geological Survey Report 12-:121–145.

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| underlies = Elliott's Cove Formation

| overlies = Chamberlains Brook Formation

| thickness = {{convert|27.5|m|ft|abbr=on}} (Random Island)

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Manuels River Formation is a Middle Cambrian (Drumian) geological formation cropping out in the Random Island area of Newfoundland and elsewhere?. Its black/dark brown, finely laminated mudstones and thicker-bedded siltstones are occasionally interrupted by thin yellowish silty limestone horizons.