White, 25, is currently in his third season with the Vikings, and becomes the sixth player to pen fresh terms at the club in the past 10 days.
He said: “This year you can see a big difference in us as a team. Since day one the bond has always been strong but this year we have really kicked on.
“Denis is doing a great job in developing young players and he’s really helped me to become a more rounded player. Things are going really well at the moment and the Club is a great place to be around. We are looking forward to really pushing on even further as we head into the next stage of the season.
“From a person viewpoint, I knew that I was going into my final year of contract at Widnes and I wanted to start strongly and I feel like I have done. I’ve had a few injuries but I feel I’m over them now and improving. The more game time I get will help me do that and I’m pleased I’ll be here for another couple of years.”
Coach Denis Betts said: “Lloyd’s potential is limitless. I’m really excited about the next couple of years for him as I believe we will see a really good player emerging. He’s already a good player but there’s so much more to come from him.”