| Name | What | Region | Country | Lat | Long | Elev ft. | Pop est |
|---|---|---|---|---|---|---|---|
| Factory Addition | city | Illinois | United States | 42.23 | -89.07 | 830 | |
| Fair Acres | city | Illinois | United States | 42.14 | -87.81 | 830 | |
| Fair Haven | city | Illinois | United States | 41.95 | -89.93 | 830 | |
| Fair Meadows | city | Illinois | United States | 42.14 | -87.83 | 830 | |
| Fair Oaks | city | Illinois | United States | 41.96 | -88.40 | 830 | |
| Fair Oaks | city | Illinois | United States | 42.14 | -87.79 | 830 | |
| Fairbanks | city | Illinois | United States | 39.72 | -88.53 | 830 | |
| Fairbury | city | Illinois | United States | 40.75 | -88.51 | 830 | |
| Fairdale | city | Illinois | United States | 42.10 | -88.93 | 830 | |
| Fairfax Village | city | Illinois | United States | 42.08 | -88.03 | 830 | |
| Fairfield | city | Illinois | United States | 42.22 | -88.06 | 830 | |
| Fairfield | city | Illinois | United States | 38.38 | -88.36 | 830 | |
| Fairfield Estates | city | Illinois | United States | 38.39 | -88.37 | 830 | |
| Fairgrange | city | Illinois | United States | 39.58 | -88.17 | 830 | |
| Fairland | city | Illinois | United States | 39.88 | -88.10 | 830 | |
| Fairman | city | Illinois | United States | 38.68 | -89.10 | 830 | |
| Fairmont | city | Illinois | United States | 41.56 | -88.06 | 830 | |
| Fairmont | city | Illinois | United States | 38.91 | -90.21 | 410 | |
| Fairmont City | city | Illinois | United States | 38.65 | -90.09 | 416 | |
| Fairmont Place | city | Illinois | United States | 39.16 | -89.50 | 830 | |
| Fairmount | city | Illinois | United States | 40.05 | -87.83 | 830 | |
| Fairview | city | Illinois | United States | 37.42 | -88.36 | 337 | |
| Fairview | city | Illinois | United States | 40.63 | -90.16 | 830 | |
| Fairview Heights | city | Illinois | United States | 38.59 | -89.99 | 830 | |
| Fairway Estates | city | Illinois | United States | 41.52 | -88.15 | 830 | |
| Faithorn | city | Illinois | United States | 41.43 | -87.61 | 830 | |
| Fall Creek | city | Illinois | United States | 39.78 | -91.30 | 830 | |
| Falling Spring | city | Illinois | United States | 38.53 | -90.19 | 830 | |
| Falmouth | city | Illinois | United States | 39.05 | -88.15 | 830 | |
| Family Manufactured Home Community | city | Illinois | United States | 42.22 | -89.08 | 830 | |
| Fancher | city | Illinois | United States | 39.27 | -88.77 | 830 | |
| Fancy Prairie | city | Illinois | United States | 40.00 | -89.60 | 830 | |
| Fandon | city | Illinois | United States | 40.37 | -90.76 | 830 | |
| Far View | city | Illinois | United States | 41.96 | -88.42 | 846 | |
| Fargo | city | Illinois | United States | 39.97 | -90.85 | 830 | |
| Faries Park (historical) | city | Illinois | United States | 39.87 | -88.88 | 830 | |
| Farina | city | Illinois | United States | 38.83 | -88.77 | 830 | |
| Farm Ridge | city | Illinois | United States | 41.23 | -88.91 | 830 | |
| Farm View Hills | city | Illinois | United States | 41.61 | -87.95 | 830 | |
| Farmdale | city | Illinois | United States | 40.67 | -89.51 | 830 | |
| Farmer City | city | Illinois | United States | 40.24 | -88.64 | 830 | |
| Farmersville | city | Illinois | United States | 39.44 | -89.65 | 830 | |
| Farmingdale | city | Illinois | United States | 39.82 | -89.81 | 830 | |
| Farmington | city | Illinois | United States | 42.17 | -88.04 | 830 | |
| Farmington | city | Illinois | United States | 41.72 | -88.12 | 830 | |
| Farmington | city | Illinois | United States | 41.94 | -88.32 | 830 | |
| Farmington | city | Illinois | United States | 40.70 | -90.01 | 830 | |
| Farmington Lakes | city | Illinois | United States | 41.71 | -88.31 | 830 | |
| Farmsville (historical) | city | Illinois | United States | 40.62 | -89.24 | 830 | |
| Farrington | city | Illinois | United States | 39.47 | -87.55 | 830 | |
| Fayette | city | Illinois | United States | 39.32 | -90.15 | 830 | |
| Fayetteville | city | Illinois | United States | 38.38 | -89.80 | 380 | |
| Fayville | city | Illinois | United States | 37.16 | -89.43 | 367 |