Newspaper reports have been linking the Wales international with a summer move to almost promoted Leicester City but Johnson says he is happy to remain at the Hawthorns for the rest of his playing career.
"There have been these stories about Leicester but I don't know anything about it," he said.
"I am contracted to Albion and, as far as I am concerned, I am staying. I love the club. I don't want to leave, but you don't know what can happen or what lies around the corner.
"I am realistic enough to know that things aren't going well for us on the pitch and we will have to see.
"But the children are happy, the wife is happy, there's no reason for me to go, and I'd like to think I could even end my career here."