Yes, I believe there was a thread on here not too long ago saying that West Paw Design (probably
www.westpawdesign.com) makes some of theirs in the US. They gave a list (posted in a thread here somewhere) of the toys that are not made in the US and all the rest are.
I also found a squeaky ball at Petsmart that is made in the US. It is made by Toy Shoppe though and some of their other stuff is made in China.