Jagielka has now made 48 appearances for Everton this season following his £4million move from Sheffield United last summer.
After initially struggling for games (10 of those appearances were as an early season sub), in recent months he has been preferred at centre-half by Everton manager David Moyes.
"I've got my feet firmly on the ground," he said following Sunday's 1-0 defeat at Arsenal. "I knew it was going to be a hard job to come here and break into a good team.
"Thankfully after the first couple of months that has happened and the results have taken care of themselves."