| Name | What | Region | Country | Lat | Long | Elev ft. | Pop est |
|---|---|---|---|---|---|---|---|
| Babcock | city | Illinois | United States | 41.53 | -90.40 | 830 | |
| Babylon | city | Illinois | United States | 40.59 | -90.35 | 830 | |
| Bachs Addition | city | Illinois | United States | 42.14 | -87.84 | 830 | |
| Back of the Yards | city | Illinois | United States | 41.81 | -87.67 | 830 | |
| Bader | city | Illinois | United States | 40.17 | -90.37 | 830 | |
| Bafalo Grouvas | city | Illinois | United States | 42.15 | -87.96 | 830 | |
| Bailey Falls (historical) | city | Illinois | United States | 41.28 | -89.04 | 830 | |
| Baileyville | city | Illinois | United States | 42.20 | -89.59 | 944 | |
| Bainbridge | city | Illinois | United States | 37.73 | -88.99 | 830 | |
| Baker | city | Illinois | United States | 41.56 | -88.81 | 830 | |
| Bakers Acres | city | Illinois | United States | 41.95 | -88.35 | 830 | |
| Bakers Crossroads | city | Illinois | United States | 37.63 | -89.11 | 830 | |
| Bakerville | city | Illinois | United States | 38.26 | -88.90 | 830 | |
| Bakerville | city | Illinois | United States | 40.06 | -89.20 | 830 | |
| Balcom | city | Illinois | United States | 37.41 | -89.21 | 830 | |
| Bald Bluff | city | Illinois | United States | 41.02 | -90.85 | 830 | |
| Bald Mound | city | Illinois | United States | 41.85 | -88.41 | 830 | |
| Baldwin | city | Illinois | United States | 38.18 | -89.84 | 830 | |
| Baldwin | city | Illinois | United States | 42.14 | -88.06 | 830 | |
| Baldwin Beach | city | Illinois | United States | 40.35 | -90.03 | 830 | |
| Baldwin Heights | city | Illinois | United States | 38.45 | -89.14 | 830 | |
| Ballou | city | Illinois | United States | 41.28 | -88.10 | 830 | |
| Bancroft Corners | city | Illinois | United States | 42.42 | -87.86 | 830 | |
| Bando | city | Illinois | United States | 39.83 | -89.71 | 830 | |
| Banklick | city | Illinois | United States | 37.83 | -88.70 | 830 | |
| Banner | city | Illinois | United States | 40.52 | -89.91 | 830 | |
| Bannister | city | Illinois | United States | 38.62 | -88.86 | 830 | |
| Bannockburn | city | Illinois | United States | 42.19 | -87.87 | 830 | |
| Barbers Corners | city | Illinois | United States | 41.71 | -88.07 | 830 | |
| Barclay | city | Illinois | United States | 39.87 | -89.52 | 830 | |
| Bardolph | city | Illinois | United States | 40.50 | -90.56 | 830 | |
| Barlow Park | city | Illinois | United States | 40.31 | -87.62 | 830 | |
| Barnard Mill (historical) | city | Illinois | United States | 42.42 | -88.36 | 846 | |
| Barnes | city | Illinois | United States | 40.50 | -88.90 | 830 | |
| Barnett | city | Illinois | United States | 39.26 | -89.70 | 830 | |
| Barnett | city | Illinois | United States | 38.85 | -89.88 | 830 | |
| Barnhill | city | Illinois | United States | 38.28 | -88.36 | 390 | |
| Barr | city | Illinois | United States | 39.96 | -89.70 | 830 | |
| Barr | city | Illinois | United States | 39.40 | -90.10 | 830 | |
| Barreville | city | Illinois | United States | 42.28 | -88.26 | 830 | |
| Barrington | city | Illinois | United States | 42.15 | -88.14 | 849 | |
| Barrington Center | city | Illinois | United States | 42.11 | -88.19 | 859 | |
| Barrington Hills | city | Illinois | United States | 42.14 | -88.16 | 830 | |
| Barrington Woods | city | Illinois | United States | 42.15 | -88.06 | 830 | |
| Barrow | city | Illinois | United States | 39.51 | -90.40 | 830 | |
| Barry | city | Illinois | United States | 39.69 | -91.04 | 830 | |
| Barstow | city | Illinois | United States | 41.52 | -90.36 | 830 | |
| Bartelso | city | Illinois | United States | 38.54 | -89.47 | 830 | |
| Bartlett | city | Illinois | United States | 42.00 | -88.19 | 830 | |
| Bartonville | city | Illinois | United States | 40.65 | -89.65 | 830 | |
| Basco | city | Illinois | United States | 40.33 | -91.20 | 830 | |
| Basham Carriage Manor Estates | city | Illinois | United States | 41.63 | -88.02 | 830 | |
| Batavia | city | Illinois | United States | 41.85 | -88.31 | 830 | |
| Batavia Junction | city | Illinois | United States | 41.80 | -88.24 | 830 | |
| Batchtown | city | Illinois | United States | 39.03 | -90.66 | 830 | |
| Bates | city | Illinois | United States | 39.72 | -89.85 | 830 | |
| Batestown | city | Illinois | United States | 40.12 | -87.70 | 830 | |
| Bath | city | Illinois | United States | 40.19 | -90.14 | 830 | |
| Baum | city | Illinois | United States | 39.33 | -90.32 | 830 | |
| Bay City | city | Illinois | United States | 37.25 | -88.50 | 400 | |
| Bay View Garden | city | Illinois | United States | 40.81 | -89.52 | 830 | |
| Bayberry Ridge | city | Illinois | United States | 41.73 | -88.04 | 830 | |
| Bayle City | city | Illinois | United States | 39.11 | -89.17 | 830 | |
| Baylestown | city | Illinois | United States | 39.09 | -89.88 | 830 | |
| Baylis | city | Illinois | United States | 39.73 | -90.91 | 843 |