* Domestic Cats: There are estimates, but no accurate count. Organizations like the World Society for the Protection of Animals (WSPA) have estimated that there are around 600 million domestic cats globally, but this is based on surveys and projections.
* Feral Cats: These are wild cats that have descended from domesticated cats, and their numbers are even harder to track. Estimates vary widely, but some suggest there could be hundreds of millions of feral cats worldwide.
* Wild Cats: This category includes species like lions, tigers, leopards, jaguars, and many others. Their populations are constantly monitored and studied, but they fluctuate due to habitat loss, poaching, and other factors.
To summarize: You can find estimates for specific populations (like domestic cats), but there's no single, definitive answer for the total "population of cats."