- Bannockburn
- Barnett
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- Barrington Hills
- Bartlett
- Bartonville
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- Beach Park
- Beaver
- Beaverville
- Bedford Park
- Beecher
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- Belvidere
- Bement
- Bennington
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- Benson
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- Berwyn
- Big Grove
- Big Rock
- Blackberry
- Bloom
- Bloomingdale
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- Bloomington City
- Blount
- Blue Island
- Blue Ridge
- Bolingbrook
- Bonfield
- Bonnie Brae
- Bonus
- Boone
- Boulder Hill
- Bourbon
- Bourbonnais
- Bowdre
- Braceville
- Braceville
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- Bradley
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- Brenton
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- Brookfield
- Brookfield
- Brooklyn
- Brown
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- Buckeye
- Buckingham
- Buckley
- Buda
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- Buffalo Grove
- Bull Valley
- Burbank
- Burlington
- Burnham
- Burr Ridge
- Burton
- Burtons Bridge
- Butler
- Button
- Byron