The rose city has been announced as next year's host weeks before Kansas City is set to host the 2013 edition.
"The Portland Timbers and their passionate fans have certainly earned the honor of hosting the 2014 AT&T MLS All-Star Game," MLS Commissioner Don Garber said in a press release. "This match will showcase to an international audience the incredible devotion to the game in the Pacific Northwest that serves as one of the most important stories for our league."
An opponent has yet to be announced.
Kansas City will host this year's edition on July 31, as the cream of MLS takes on Italian club AS Roma at Sporting Park.