James Whalley went missing after being seen by his family at home in Holcombe, Somerset, at 10pm on Sunday April 3.
He had packed a bag to go to church camp on Sunday evening but when his mother, Sharon Whalley, went to wake him on Monday morning he was gone.
Police said he had taken the Nike holdall bag with him, along with his sleeping bag.
A spokesman for Avon and Somerset Police confirmed James was found on Tuesday morning.
"James Whalley, who was reported missing on Sunday, has been found safe and well," the force spokesman said.
"We'd like to thank the media and the public for their help with our original appeal."
The force spokesman declined to say where James was found or by whom.
Officers had been searching the local area, including Holcombe Quarry, and the police helicopter has also been deployed.
In an appeal on Monday night Mrs Whalley said her son was happy and popular.
"It is horrific but with my faith in God I know that God has got it in control," she told ITV News West Country.
"Yes, it is hard and, yes, we want him back and whatever he's done we'll forgive him - that's what we really want him to know.
"But there's lots and lots of people praying for him up and down the country, loads of people are offering to search and help.
"We just want him to know that he's loved and wanted back."