Kolb, who had been back-up for Donovan McNabb before he was traded to NFC East division rival Washington in the off-season, was given a one-year extension and bonus that locked him up through the 2011 season, the club said.
"When given the chance, Kevin has proven to have good command of this offense and we're looking forward to having him operate as the number one quarterback for the Philadelphia Eagles."
The 25-year-old Kolb was the second-round draft choice of the Eagles in 2007.
After McNabb was injured early last season, Kolb stepped into the starting lineup and became the first NFL quarterback to pass for 300 yards in his first two starts. He threw for 391 yards against New Orleans and passed for 327 yards a week later against Kansas City.
"It will be a different feel but, at the same time, it feels right," Kolb told a news conference about taking charge of the offense. "It feels right to be the starter."
The Eagles also have former All-Pro quarterback Michael Vick on the roster. Vick played a limited role last season after missing two NFL seasons while serving jail time for his role in a dogfighting ring.
(Writing by Larry Fine, Editing by Justin Palmer)