United manager Sir Alex Ferguson has said he's really keen to sign the star.
But reports from Merseyside suggest Rooney might prefer to go to Newcastle rather than Old Trafford.
Thanks to fans
In a statement to fans Rooney said: "I hope Everton's fans will understand my decision.
"This has been one of the hardest decisions of my life but I feel the time is now right for me to move forward with my career," added the striker.
Rooney then thanked fans for their support, and said he hoped Everton would benefit from the transfer fee.