Arnold, MD ZIP Codes
1
Total ZIPs
21,317
Total Population
ZIP Codes in Arnold, MD
| ZIP Code | Population | Density | Timezone |
|---|---|---|---|
| 21012 | 21,317 | 843 | America/New_York |
All data sourced from the U.S. Census Bureau, American Community Survey (ACS) 5-Year Estimates (2023).
PlainZIP is not affiliated with the U.S. Census Bureau or any government agency.