Unfortunately, while a considerable amount of the world's cotton is grown in the US, nearly all of it is woven into fabric and printed overseas where labor's cheaper. Dan River was the last of the big ones to close up shop, and what's left supplies fabrics to clothing industry/home decor.
While I still shop JoAnn's for notions . . . my LQS is where I turn for fabric. Frankly . . .when JoAnn's stopped being "ClothWorld" and became "everything under the sun, JoAnn's", focus on fabric declined substantially.