St. Louis County, Missouri ZIP Codes
- ZIP records
63 - Cities represented
13 - Sum of listed ZIP population estimates
1,308,579
Population sum includes positive estimates in these ZIP records; it is not an official county population.
Top ZIP Codes by Population
| Rank | ZIP Code | City | Population estimate |
|---|---|---|---|
| 1 | 63021 | Ballwin | 55,666 |
| 2 | 63129 | Saint Louis | 51,553 |
| 3 | 63031 | Florissant | 50,196 |
| 4 | 63123 | Saint Louis | 49,077 |
| 5 | 63026 | Fenton | 45,354 |
| 6 | 63017 | Chesterfield | 43,243 |
| 7 | 63033 | Florissant | 43,056 |
| 8 | 63116 | Saint Louis | 42,170 |
| 9 | 63122 | Saint Louis | 41,634 |
| 10 | 63136 | Saint Louis | 40,929 |
Cities in St. Louis County
- Ballwin
- Bridgeton
- Chesterfield
- Earth City
- Eureka
- Fenton
- Florissant
- Hazelwood
- Maryland Heights
- Saint Ann
- Saint Louis
- Valley Park
- Wildwood
ZIP Directory
- ZIP 63005
- ZIP 63011
- ZIP 63017
- ZIP 63021
- ZIP 63025
- ZIP 63026
- ZIP 63031
- ZIP 63033
- ZIP 63034
- ZIP 63038
- ZIP 63040
- ZIP 63042
- ZIP 63043
- ZIP 63044
- ZIP 63045
- ZIP 63074
- ZIP 63088
- ZIP 63101
- ZIP 63102
- ZIP 63103
- ZIP 63104
- ZIP 63105
- ZIP 63106
- ZIP 63107
- ZIP 63108
- ZIP 63109
- ZIP 63110
- ZIP 63111
- ZIP 63112
- ZIP 63113
- ZIP 63114
- ZIP 63115
- ZIP 63116
- ZIP 63117
- ZIP 63118
- ZIP 63119
- ZIP 63120
- ZIP 63121
- ZIP 63122
- ZIP 63123
- ZIP 63124
- ZIP 63125
- ZIP 63126
- ZIP 63127
- ZIP 63128
- ZIP 63129
- ZIP 63130
- ZIP 63131
- ZIP 63132
- ZIP 63133
- ZIP 63134
- ZIP 63135
- ZIP 63136
- ZIP 63137
- ZIP 63138
- ZIP 63139
- ZIP 63140
- ZIP 63141
- ZIP 63143
- ZIP 63144
- ZIP 63146
- ZIP 63147
- ZIP 63155
Browse all ZIP data for Missouri
Methodology: Records are grouped by the source file's listed county and state. Population sums add positive ZIP-level estimates and are not official county totals; city counts use distinct city labels in the source.