| Localité | Code postal |
|---|---|
| Arbutus, Baltimore | 21227 |
| Baldwin, Baltimore | 21013 |
| Baltimore, Baltimore | 21250 |
| Bentley Springs, Baltimore | 21120 |
| Boring, Baltimore | 21020 |
| Bradshaw, Baltimore | 21087 |
| Brooklandville, Baltimore | 21022 |
| Butler, Baltimore | 21023 |
| Catonsville, Baltimore | 21228 |
| Chase, Baltimore | 21027 |
| Cockeysville, Baltimore | 21030 |
| Dundalk, Baltimore | 21222 |
| Dundalk Sparrows Point, Baltimore | 21222 |
| Edgemere, Baltimore | 21219 |
| Essex, Baltimore | 21221 |
| Eudowood, Baltimore | 21204 |
| Fork, Baltimore | 21051 |
| Fort Howard, Baltimore | 21052 |
| Fowbelsburg, Baltimore | 21155 |
| Foxridge, Baltimore | 21133 |
| Freeland, Baltimore | 21053 |
| Garrison, Baltimore | 21117 |
| Glen Arm, Baltimore | 21057 |
| Glencoe, Baltimore | 21152 |
| Glyndon, Baltimore | 21071, 21136 |
| Gwynn Oak, Baltimore | 21207 |