if he died that would probably be the one death I was actually sad about

Same I got attached to Jim

He isn’t dead. There is a teaser or something like that where he is in Russia.

ALSO, go to youtube and look for "Stranger Things season 4 table read" You can see David Harbour there with the rest of the cast.

Jim Hopper isn’t died, he’s just alive. Just watch the post credits in the end of season three, teaser trailer of season four and table read of season four. Then you will see the proof that he’s alive! Just like the rest of us.

They frickin confirmed it multiple times.

I am almost 100% sure he's alive. Though, I don't know if they were referring to Hop at the end of Season 3.

They were.

Is it confirmed?

If you watch the teaser he’s alive and working for the russians