From the Wiki:
The first USAF squadron to operate F-22A's was the 43rd Fighter Squadron, at Tyndall AFB, Florida. The 43rd was re-established at Tyndall in 2002, and, in 2003, with a corps of 15 Raptor Instructor Pilots, began training student Raptor pilots for the 27th Fighter Squadron at Langley. The 43rd continues to produce new Raptor pilots, and will continually serve as the focal point for all F-22 training of combat USAF Raptor pilots and maintainers. Additionally Raptor units include the 422 Test and Evaluation Squadron, which is responsible for tactics development and evaluation for the F-22, and the 412th Test Squadron, which continues to fly developmental test of F-22 enhancements and modernization. The 27th Fighter Squadron became the first deployable F-22 unit in December 2005 after receiving sufficient numbers of trained Raptor pilots from the 43rd at Tyndall. The 94th Fighter Squadron, also at Langley, will be the second combat Raptor squadron, with additional squadrons to follow at Elmendorf AFB, Alaska, and Holloman AFB, New Mexico.