Do humans have Coelom?
Wikipedia actually covers this:


  Most bilateral animals, including all the vertebrates, are coelomates.


Now, some coelomates have subsequently lost their coelom but primates (actually, I believe, all vertebrates) are not among them. In humans, the coelom forms, amongst others, the pleural cavity.

So, yes: humans do have a coelom that partitions into different, unconnected body cavities during development.