Cottonwood Island may refer to:
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Cottonwood Island (Nevada)
Cottonwood Island, a large island in the Colorado River, within Cottonwood Valley, in Clark County, Nevada. Cottonwood Island was a low-lying island about 10 miles long and up to 3 miles wide. It was forested by cottonwoods and also after the s ...
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Cottonwood Island (Washington)
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