US location post office
ZIP Code 78543
- Zip Code: 78543
- Type: POBox
- Official USPS city name: Elsa
- Official USPS State Code: TX
- Official State Name: Texas
- ZCTA: TRUE
- Population: 8689.0
- Density: 563.8
- Primary Official County Code: 48215
- Primary Official County Name: Hidalgo
- Official County Name: Hidalgo
- Official County Code: 48215
- Imprecise: FALSE
- Military: FALSE
- Timezone: America/Chicago (16:26 PM Friday, July 25 2025-07-25 (GMT -0500))
- Geo Point: 26.29737, -97.99997
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