How many private zoos are in the U.S?

As of my last knowledge update, there are approximately 2,000 privately owned zoos in the United States. These collections may include various wildlife, from common domestic animals to exotic and rare species. However, it's essential to note that the term "private zoo" is not strictly regulated, and some animal collections may operate with various levels of licensing or oversight. For the most up-to-date and accurate information, I recommend consulting reputable sources or contacting local animal welfare or wildlife management authorities in the United States.