- Bagnell
- Baker
- Ballwin
- Baring
- Barnard
- Barnett
- Barnhart
- Bates City
- Battlefield
- Bel-Nor
- Bel-Ridge
- Bell City
- Bella Villa
- Belle
- Bellefontaine Neighbors
- Bellerive
- Bellflower
- Belmont Landing
- Bennett Springs
- Benton
- Benton City
- Berger
- Bernie
- Bertrand
- Bethany
- Bethel
- Bevier
- Biehle
- Big Lake
- Big Spring
- Bigelow
- Birch Tree
- Black Jack
- Blackburn
- Blackwater
- Blairstown
- Bland
- Blodgett, Sandywoods Township
- Bloomfield
- Bloomsdale
- Blue Eye
- Blue Springs
- Blythedale
- Bogard
- Bolckow
- Bolivar
- Bonne Terre
- Boonville
- Bosworth
- Bourbon
- Bragg City
- Brandsville
- Branson
- Branson West
- Brashear
- Braymer
- Breckenridge
- Breckenridge Hills
- Brentwood
- Brewer
- Bridgeton
- Brimson
- Bronaugh
- Brookfield
- Brooklyn Heights
- Browning
- Brownington
- Brumley
- Bucklin
- Buckner
- Bull Creek
- Bunceton
- Bunker
- Burgess
- Burlington Junction
- Butterfield
- Byrnes Mill
