Are all foxes found in the northern hemisphere?

No, not all foxes are found in the northern hemisphere. While most fox species are indeed found in the northern hemisphere, there are a few exceptions.

The gray fox (Urocyon cinereoargenteus) and the kit fox (Vulpes macrotis) are both found in North America, but they also range into the southern hemisphere, extending into Central America.

The hoary fox (Lycalopex vetulus) and the crab-eating fox (Cerdocyon thous) are both found in South America.

Additionally, the bat-eared fox (Otocyon megalotis) is found in Africa.