O’Fallon, IllinoisO’Fallon is located in Saint Clair County 83 miles (as the crow flies) from Springfield, Illinois. It has a population of 16,073 residents and covers over 15 square kilometers of land.
O’Fallon, IllinoisO’Fallon is located in Saint Clair County 83 miles (as the crow flies) from Springfield, Illinois. It has a population of 16,073 residents and covers over 15 square kilometers of land.
