Cimarron River may refer to:
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Cimarron River (Arkansas River tributary), a tributary of the Arkansas River with headwaters in New Mexico
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Cimarron River (Canadian River tributary), a tributary of the Canadian River entirely within New Mexico
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Cimarron River (Gunnison River tributary)
The Cimarron River is a U.S. Geological Survey. National Hydrography Dataset high-resolution flowline dataThe National Map, accessed March 18, 2011 tributary that joins the Gunnison River in Curecanti National Recreation Area near Cimarron, Colo ...
, a tributary of the Gunnison River in Colorado
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