The original Hellboy (2004), had a mid-credits scene featuring Jeffory Tambor. In it he is looking around the bad guy’s labyrinth, wondering where everyone went. An okay throw-away joke at best. You can currently watch the the old Hellboy on Netflix.
YES! The new Hellboy does have post credits scenes. Both a mid-credits scene and one at the very end.
If you do stick around for these scenes, please consider picking up your soda and popcorn bag. The ushers have less time to clean between showings and by helping take out the big stuff, they can focus on sweeping up the small stuff.