Nope. Satanism is NOT atheistic.
Why?
Satan is a deity. (even in Christianity he is at least a dime-god, being a son of god, only like a bad Jesus)
Followers worship that deity.
Satanists generally believe in a god, besides Satan, they just put Satan first before the god worshiped by Christians, Jews and Muslims.

Atheists on the other hand don't believe in deities of any kind, and don't worship them, because they don't actually exist.

Given that you are not thinking straight about atheist, we are all happy to laugh at you.

Satanism is not an atheistic religion. (Sorry if this has been commented already.)

Atheists lack a belief in a god(s), therefore we cannot have a belief in Satan.

One is the same as the other, invisible and fictional.

Actually is Satanism truly an atheistic. I mean they do worship Satan and isn't that the exact opposite of atheism.

Wait a minute here. Last time I checked, this Satan fella is on the big list of supernatural beings manufactured by Big Boy Blue in the Beyond. Belief in that guy would be a belief in a supernatural deity who hasn't gained the rank and stature of the Big Guy in the Sky. The word 'atheist' doesn't apply here. Back up a few paces and try again there, daniellaws.

I would consider myself one

Isn’t ‘atheistic religion’ self contradictory?

Satanism is theist and does not belong on an agnostic or atheist site. It starts believing in a false magic and goes downhill from there.

As I understand, the members of the Church of Satan are basically humanist atheists. They do not believe in a literal Satan. It is only a symbol representing a stand against Christian privilege in this country as well as hypocritical and harmful Christian beliefs. And, they use their status as a religion to let the Christians know that in this country, the US, they have no higher standing in the Constitution than any other religion--if they want their Ten Commandments on public property, then all religious monuments should be allowed--that sort of thing.

No Sir, not me. I wanted to be a wiccan once, but i didnt go for the horned god or venus the moon. So..., i never finished the classes. Oh, they loved me though. I just couldnt do it.

Um - no. In order to believe in "satan", you have to believe in god. Satanism is the "opposite" of Xtianity (specifically - I don't know if other major or minor religions have an analogous diety). It's rather on the order of "love" vs "hate" - like those, satan/god are the opposite sides of the same coin. The actual opposite of love/hate is indifference; the actual opposite of satan/god is atheism.

"Satanism" comes in two forms. 1: the low IQs that think some "dark lord" is coming back to reign for a thousand years of darkness. 2: the "Left Hand Path" who simply focus on base self gratification.
Satanism is a Christian denomination, as "Satan" is a Christian construct.

You can’t be an atheist if you have a deity , satanist are not atheist