Reagan's parents Jack and Nelle, moved to Dixon in 1920, when Reagan was 9 years old. Dixon is a beautiful old river town with a population of 15,000 and is the Petunia Capital of Illinois. The annual Petunia Festival is one of the premier festivals in the state and is held over the 4th of July holiday. The Victory Arch Memorial has greeted travelers on Galena Avenue since 1919.