US location post office
Rockville, Maryland ZIP Codes
| ZIP Code | Type | City | County | County Code |
|---|---|---|---|---|
| 20850 | Standard | Rockville | Montgomery | 24031 |
| 20851 | Standard | Rockville | Montgomery | 24031 |
| 20852 | Standard | Rockville | Montgomery | 24031 |
| 20853 | Standard | Rockville | Montgomery | 24031 |
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