Places beginning with BU in Illinois, United States
- Buckeye
- Buckeye, Township of
- Buckhart
- Buckhart, Township of
- Buckheart, Township of
- Buckhorn
- Buckhorn Corners
- Buckhorn, Township of
- Buckingham
- Buckley
- Buckner
- Bucks
- Bucktown
- Buck, Township of
- Buda
- Budd
- Buena Park (subdivision)
- Buena Vista
- Buena Vista
- Buena Vista, Township of
- Buffalo
- Buffalo Grove
- Buffalo Grove
- Buffalo Hart
- Buffalo Hart, Township of
- Buffalo Prairie
- Buffalo Prairie, Township of
- Buffalo, Township of
- Bulldog Crossing
- Bull Valley
- Bulpitt
- Buncombe
- Bungay
- Bunje
- Bunker Hill
- Bunker Hill, Township of
- Bunkum
- Burbank
- Bureau
- Bureau County
- Bureau, Township of
- Burgess
- Burgess, Township of
- Burke
- Burksville
- Burksville Station
- Burlingame
- Burlington
- Burlington, Township of
- Burnett
- Burnham
- Burnham Place (subdivision)
- Burning Tree
- Burns
- Burnside
- Burnside
- Burnside Election Precinct
- Burnside (historical)
- Burnside (subdivision)
- Burnside, Township of
- Burns, Township of
- Burnt Prairie
- Burnt Prairie, Township of
- Burritt, Township of
- Burr Oak Acres (subdivision)
- Burrowsville
- Burr Ridge
- Burt
- Burton
- Burtons Bridge
- Burton, Township of
- Burton, Township of
- Burton View
- Busenville
- Bush
- Bushnell
- Bushnell, Township of
- Bushs Corners
- Bushton
- Butler
- Butler Grove, Township of
- Butler, Township of
- Button, Township of
- Buzzville