US location post office
ZIP Code 21529
- Zip Code: 21529
- Type: POBox
- Official USPS city name: Ellerslie
- Official USPS State Code: MD
- Official State Name: Maryland
- ZCTA: TRUE
- Population: 434.0
- Density: 46.3
- Primary Official County Code: 24001
- Primary Official County Name: Allegany
- Official County Name: Allegany
- Official County Code: 24001
- Imprecise: FALSE
- Military: FALSE
- Timezone: America/New_York (22:45 PM Monday, May 12 2025-05-12 (GMT -0400))
- Geo Point: 39.70616, -78.76852
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