Are there any Christian denominations that deny the existence of an afterlife? The Sadducees in ancient Israel rejected the very idea of there being an afterlife. They claimed that the punishment and curses as well as the blessings and rewards described throughout the Bible are earthly.

Many Jewish held beliefs carry over into Christianity, but are there any Christian denominations that believe this?
I would have to say no.

Now, I'm not an expert on ABSOLUTELY EVERY denomination, but I have never heard of a denomination that denies the existence of consciousness after death.

Note that there may be small groups that are nondemoninational, who have unconventional beliefs. Seeing that nondemoninational is such a general term, we can't really give an answer, seeing that a small church in somewhere might believe that.

But to my knowledge, there are no other denominations (other than nondemoninational, as stated) that deny the existence of an afterlife, though the idea of the afterlife might be morphed a bit across denominations.