43
Zip Codes
2,140,138
Est. Population
592.5
Square Miles
27
Cities/Areas
All Zip Codes in Contra Costa County
94505
Byron
Pop: 79,616
94506
Black Hawk
Pop: 38,635
94507
Alamo
Pop: 22,036
94509
Antioch
Pop: 20,229
94511
Bethel Island
Pop: 12,847
94513
Brentwood
Pop: 432,288
94514
Byron
Pop: 87,564
94517
Clayton
Pop: 153,034
94518
Concord
Pop: 9,496
94519
Concord
Pop: 20,951
94520
Concord
Pop: 15,043
94521
Concord
Pop: 44,845
94523
Pleasant Hill
Pop: 9,560
94525
Crockett
Pop: 3,412
94526
Danville
Pop: 55,406
94528
Danville
Pop: 3,622
94530
El Cerrito
Pop: 19,095
94531
Antioch
Pop: 30,458
94547
Hercules
Pop: 14,554
94548
Oakley
Pop: 3,367
94549
Lafayette
Pop: 93,646
94553
Pacheco
Pop: 209,705
94556
Moraga
Pop: 52,183
94561
Oakley
Pop: 104,610
94563
Orinda
Pop: 83,866
94564
Pinole
Pop: 33,208
94565
Shore Acres
Pop: 100,991
94569
Port Costa
Pop: 7,354
94572
Rodeo
Pop: 15,031
94575
Moraga
Pop: 978
94582
Black Hawk
Pop: 53,944
94583
San Ramon
Pop: 39,466
94595
Walnut Creek
Pop: 10,214
94596
Walnut Creek
Pop: 12,505
94597
Pleasant Hill
Pop: 16,748
94598
Walnut Creek
Pop: 34,566
94801
Richmond
Pop: 35,200
94803
El Sobrante
Pop: 23,964
94804
Richmond
Pop: 24,340
94805
Richmond
Pop: 6,466
94806
San Pablo
Pop: 19,305
94850
Richmond
Pop: 451
95391
Byron
Pop: 85,339