Jagielka has deputised as captain at times this season in the absence of Neville, but concedes that he is still getting used to the idea that he will be taking on the armband full-time.
"It's a strange one," he said. "Nev is still here and I am still vice-captain. It's not like he's retired or injured. He is going to play again.
"It hasn't sunk in properly, as technically it is not mine yet. Just being captain when he has not been here has been a fantastic honour.
"I've have been here for a decent amount of time. I pretty much know how the club works and it was brilliant when the manager pulled me in to confirm it.
"Different things can happen. New players can come in and they can take it, so it's good that it's me.
"It probably won't hit me until next season when I haven't got someone else to hide behind. It's something that I have got to look forward to - even if I have to sit next to the manager for the team photo!"