After mulling over interest from a number of schools including Stanford, UNLV, Oregon and North Carolina, the 6-foot-8 power forward out of Las Vegas (Nev.) Bishop Gorman informed Scout.com of his decision.
"I'm going to Stanford," Allen said.
"It's a school close to home and knowing that I would get the best education there and being able to compete in a good league like the PAC-12," Allen said when asked why he went with the Cardinal.
Allen, who took official visits to Stanford, UNLV and Oregon, said his visits played a major role in the decision making process.
"I had never been on campus to Stanford before and I thought it was a neat place," Allen told Scout.com. "It definitely stood out to me. I definitely could see myself going there. I saw the campus and just fit in with the guys very easy."
"I've wanted to go there for a while, but I kind of wanted to check some other places out in case my mind would change, but it didn't."
Johnny Dawkins and assistant Mike Schrage have been recruiting Allen for over three years and he said their consistency stood out to him.
"He's been recruiting me since my freshman year so I've known him for a long time, him and coach Schrage," he said. "I've seen them coming to games and coming to practices and just being consistent and I just built a great relationship with them."
Scout.com's No. 72nd ranked prospect also cited Stanford's academic reputation and likes that they can help him once he's done with basketball.
"It definitely mattered a lot to me," he said of Stanford's academics. "I know that one day basketball is going to end and I just have to look forward to the future and I think with Stanford behind me will give me a better job."
Allen is Stanford's third commitment for the 2012 class and their second ranked among the top 100 prospects. He joins 6-foot-10 big man Grant Verhoeven and sharp shooter Christian Sanders to make up their current class.