Towns
| State | City/Town | Town Title |
|---|---|---|
| Illinois | Rolling Meadows | Rolling Meadows, IL |
| Illinois | Rome | Rome, IL |
| Illinois | Romeoville | Romeoville, IL |
| Illinois | Roodhouse | Roodhouse, IL |
| Illinois | Rosamond | Rosamond, IL |
| Illinois | Roscoe | Roscoe, IL |
| Illinois | Roselle | Roselle, IL |
| Illinois | Roseville | Roseville, IL |
| Illinois | Rosiclare | Rosiclare, IL |
| Illinois | Rossville | Rossville, IL |
| Illinois | Round Lake | Round Lake, IL |
| Illinois | Round Lake Park | Round Lake Park, IL |
| Illinois | Roxana | Roxana, IL |
| Illinois | Royal | Royal, IL |
| Illinois | Royalton | Royalton, IL |
| Illinois | Rushville | Rushville, IL |
| Illinois | Russell | Russell, IL |
| Illinois | Rutland | Rutland, IL |
| Illinois | Sadorus | Sadorus, IL |
| Illinois | Sailor Springs | Sailor Springs, IL |
| Illinois | Saint Anne | Saint Anne, IL |
| Illinois | Saint Augustine | Saint Augustine, IL |
| Illinois | Saint Charles | Saint Charles, IL |
| Illinois | Saint David | Saint David, IL |
| Illinois | Saint Elmo | Saint Elmo, IL |