California Gazetteer > California ZIP Codes > County ZIP Codes > Contra Costa ZIP Codes

Also see: ZIP Codes in Contra Costa with Associated Cities & Towns

ZIP Codes in Contra Costa County with Associated Cities & Towns

Alamo   94507
Antioch   94509
Antioch   94531
Bay Point   94565
Bethel Island   94511
Blackhawk   94506
Brentwood   94513
Briones   94553
Byron   94505
Byron   94514
Canyon   94516
Clayton   94517
Concord   94518
Concord   94519
Concord   94520
Concord   94521
Concord   94522
Concord   94523
Concord   94524
Concord   94527
Concord   94529
Crockett   94525
Danville   94506
 Danville   94526
Diablo   94528
Discovery Bay   94505
Discovery Bay   94514
El Cerrito   94530
El Sobrante   94803
El Sobrante   94820
Hercules   94547
Hilltop Mall   94806
Knightsen   94548
Lafayette   94549
Martinez   94553
Moraga   94556
Moraga   94570
Moraga   94575
N Richmond   94801
North Richmond   94801
Oakley   94561
Orinda   94563
Pacheco   94553
Pinole   94564
Pittsburg   94565
Pleasant Hill   94523
 Point Richmond   94801
Port Costa   94569
Pt Richmond   94801
Richmond   94801
Richmond   94802
Richmond   94803
Richmond   94804
Richmond   94805
Richmond   94806
Richmond   94807
Richmond   94808
Richmond   94820
Richmond   94850
Rodeo   94547
Rodeo   94572
San Pablo   94806
San Ramon   94582
San Ramon   94583
Walnut Creek   94595
Walnut Creek   94596
Walnut Creek   94597
Walnut Creek   94598

ZIP Codes - Key Concepts

  1. ZIP Codes are categories for grouping mailing addresses and are not exact geographic regions.
  2. The centroid of a ZIP Code may be in one County and the associated city/town in another.
  3. In rural areas, a single ZIP Code may be used for cities and towns in several different Counties.
  4. ZIP Code "areas" can overlap, be subsets of each other, or be artificial constructs with no geographic area.
  5. ZIP Codes are only loosely tied to cities.