ZIP Code 57481: Westport, SD
County: Brown
Coordinates: 45.67050, -98.58020
ZIP Type: Standard
Time Zone: Central Time (CT)
This profile provides an in-depth look at ZIP code 57481, serving Westport in SD. It lies in Brown and supports delivery, planning, and address verification.
| Primary City | Westport |
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| ZIP Code | 57481 |
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| County | Brown |
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| State | SD |
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| Latitude / Longitude | 45.67050, -98.58020 |
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| ZIP Type | Standard |
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| Time Zone | Central Time (CT) |
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| Data Updated | 2026-01-08 |
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Maps & Useful Links
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These links show the approximate center point for ZIP 57481 (not an exact boundary).
Geographic & Administrative Context
Coordinates for 57481 are listed as 45.67050 / -98.58020, useful for GPS and service checks in and around Westport, SD.
Local Coverage Notes
ZIP codes can cover multiple neighborhoods and unincorporated areas. Use ZIP 57481 for mail delivery and general location reference in
Brown,
SD.
Coverage may include nearby neighborhoods and adjacent unincorporated areas commonly associated with Westport.
Related ZIP Codes (Nearby)
Explore other postal codes near Westport within SD.
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Frequently Asked Questions
What is the primary city for ZIP code 57481?
The primary city for this ZIP code is Westport, located in SD.
In which county is 57481 located?
ZIP code 57481 is situated within Brown, SD.
What are the coordinates for 57481?
The approximate center point is 45.67050 (Latitude) and -98.58020 (Longitude).
Is ZIP code 57481 active?
This page lists ZIP 57481 as Listed based on the latest refresh date shown above.
Does ZIP 57481 cover multiple areas?
Yes. Many ZIP codes cover multiple neighborhoods or nearby areas. For exact boundaries, use official mapping tools.
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Methodology & Data Notes
How we build this page: We generate this page from a structured ZIP dataset and refresh key fields (city, county, and coordinates) during scheduled updates. Coordinates represent an approximate center point, not an official boundary map.
Sources: Public ZIP reference datasets and geographic coordinate references. If you use specific sources (e.g., USPS, Census), list them on your About/Methodology page.
Page updated: 2026-01-08