Seneca South Dakota ZIP Codes
Seneca holds a single ZIP code.
Every ZIP code in Seneca
| ZIP code | County |
|---|---|
| 57473 | Faulk County |
We do not publish a delivery type (standard, PO box, unique) or a neighbourhood for each ZIP. USPS delivery-type products are licensed, and no clean-rights source maps ZIP codes to neighbourhoods — so the Seneca codes above are listed without a column we would have to invent.
Scope every ZIP code recorded for Seneca. Source GeoNames US postal codes (2026-07 postal dump) and Census 2024 county Gazetteer (2024 Gazetteer). Updated . ZIP codes are delivery-route groupings, not areas; the boundaries implied by any ZIP map are approximations.
How these codes cluster
Every Seneca ZIP code begins 574. Those first three digits identify the sectional center facility that processes mail for this part of South Dakota. Statewide that range covers 50 ZIP codes, so Seneca accounts for 2% of it.
Every South Dakota ZIP prefix and the region it covers →
Area codes covering Seneca
ZIP codes and area codes are separate systems — one routes mail, the other routes calls — and they do not share boundaries. The code below serves the same ground Seneca occupies.
Seneca South Dakota area codes in full →
Where Seneca's ZIP codes sit
- Reference points and footprint
- Not an official NANPA boundary
- Not a USPS delivery area
Cities near Seneca
| City | Distance | ZIP codes |
|---|---|---|
| Onaka South Dakota ZIP codes | 9.3 mi | 1 ZIP code |
| Tolstoy South Dakota ZIP codes | 11 mi | 1 ZIP code |
| Lebanon South Dakota ZIP codes | 13 mi | 1 ZIP code |
| Hoven South Dakota ZIP codes | 18 mi | 1 ZIP code |
| Faulkton South Dakota ZIP codes | 19 mi | 1 ZIP code |
| Gettysburg South Dakota ZIP codes | 22 mi | 1 ZIP code |
| Orient South Dakota ZIP codes | 23 mi | 1 ZIP code |
| Bowdle South Dakota ZIP codes | 28 mi | 1 ZIP code |
Straight-line distance between place reference points, not driving distance.