- Bakersfield (Population: 247,057)
- Baldwin Park (Population: 75,837)
- Banning (Population: 23,562)
- Barstow (Population: 21,119)
- Bay Point (Population: 21,534)
- Bayview (Population: 2,359)
- Bayview-Montalvin (Population: 5,004)
- Baywood-Los Osos (Population: 14,351)
- Beale AFB (Population: 5,115)
- Bear Valley Springs (Population: 4,232)
- Beaumont (Population: 11,384)
- Bell (Population: 36,664)
- Bell Gardens (Population: 44,054)
- Bellflower (Population: 72,878)
- Belmont (Population: 25,123)
- Belvedere (Population: 2,125)
- Ben Lomond (Population: 2,364)
- Benicia (Population: 26,865)
- Berkeley (Population: 102,743)
- Bermuda Dunes (Population: 6,229)
- Bertsch-Oceanview (Population: 2,238)
- Bethel Island (Population: 2,312)
- Beverly Hills (Population: 33,784)
- Big Bear City (Population: 5,779)
- Big Bear Lake (Population: 5,438)
- Big Pine (Population: 1,350)
- Big River (Population: 1,266)
- Biggs (Population: 1,793)
- Biola (Population: 1,037)
- Bishop (Population: 3,575)
- Black Point-Green Point (Population: 1,143)
- Blackhawk-Camino Tassajara (Population: 10,048)
- Bloomington (Population: 19,318)
- Blue Lake (Population: 1,135)
- Blythe (Population: 12,155)
- Bodega Bay (Population: 1,423)
- Bodfish (Population: 1,823)
- Bolinas (Population: 1,246)
- Bonadelle Ranchos-Madera Ranchos (Population: 7,300)
- Bonita (Population: 12,401)
- Bonsall (Population: 3,401)
- Bootjack (Population: 1,588)
- Boron (Population: 2,025)
- Boronda (Population: 1,325)
- Borrego Springs (Population: 2,535)
- Bostonia (Population: 15,169)
- Boulder Creek (Population: 4,081)
- Boyes Hot Springs (Population: 6,665)
- Brawley (Population: 22,052)
- Brea (Population: 35,410)
- Brentwood (Population: 23,302)
- Bret Harte (Population: 5,161)
- Brisbane (Population: 3,597)
- Broadmoor (Population: 4,026)
- Buellton (Population: 3,828)
- Buena Park (Population: 78,282)
- Buena Vista (Population: 1,704)
- Burbank (Population: 100,316)
- Burlingame (Population: 28,158)
- Burney (Population: 3,217)
- Buttonwillow (Population: 1,266)
- Bystrom (Population: 4,518)
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