Is madara still the Mizukage?????or is he just the leader of the akatsuki

No, Madara Uchiha WAS the Mizukage but it has been dado to another person, so now he is only the leader of the Akatsuki...

technically madara wasn't exactly mizukage he controlled the fourth mizukage with a genjutsi and took control but to answer your question; no, now its Mei Terumī as fifth mizukage. and madara took advantage of nagato's (main fuente of pain) 'want of peace' and made nagato create akatsuki but now he is dead madara took over akatsuki as leader.

he just the leader

he only the leader of the atuski

no mei terumi is the mizukage now

leader

Madara never wasn't Mizukage o Akatsuki's leader.
Because how I understood in manga he were dead all the time.
When fourth war started, Kabutamaru resurrected Madara. And all were in shock.
Because in the period of all time everybody thought that the man in mask is Madara.

Madara Uchiha is the founder and true leader of the akatsuki, pein was leader on Madara's behalf receiving orders from him look at naruto episode ''disappearance'' tu will see konan and pein meeting up with madara. and madara does tell pein to tell the other akatsuki members to hurry up with the remaining tailed beasts to capture., and yes yagura was the mizukage been under madara's control, making madara the true mizukage. yagura was just a ''vessel'' madara was using to fulfill his plan and he got kisame to registrarse him as well, i hope i answer your pregunta ^-^