Poplar Grove Airport is a small general aviation airport located in Poplar Grove, Illinois, United States. The airport was founded in 1972 as Belvidere Airport and renamed in 1994. It is located 3 miles south of Poplar Grove, Illinois, and 3 miles north of Belvidere, Illinois. It is the home of the Poplar Grove Vintage Wings and Wheels Museum and BelAir Estates, a residential fly-in neighborhood.