*DISCLAIMER: I make no claim to being a seer, nor do I claim to have access to the One Truth.
- Technically, a pagan is someone who isn’t a member of the big three: Judaism, Christianity, and Muslim, or an offshoot thereof.
- A wiccan is someone who is a member of wicca, or an offshoot thereof.
The 'typical' usage of this word is to denote an offshoot of one of Gardenerian Wicca, or a(n) branch/offshoot thereof.
However, most people use the term pagan to refer to a non-monotheistic religion, i.e.:
"pantheism, panethism, polytheism, duotheism." - sleeping_wolf
A wiccan is a pagan, but a pagan is not necessarily a wiccan.