New Underwood South Dakota ZIP Codes
New Underwood holds a single ZIP code.
Every ZIP code in New Underwood
| ZIP code | County |
|---|---|
| 57761 | Pennington 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We do not publish a delivery type (standard, PO box, unique) or a neighbourhood for each ZIP.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 New Underwood codes above are listed without a column we would have to invent.
Scope every ZIP code recorded for New Underwood. 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 New Underwood ZIP code begins 577. Those first three digits identify the sectional center facility that processes mail for this part of South Dakota. Statewide that range covers 58 ZIP codes, so New Underwood accounts for 2% of it.
Every South Dakota ZIP prefix and the region it covers →
Area codes covering New Underwood
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 New Underwood occupies.
New Underwood South Dakota area codes in full →
Where New Underwood's ZIP codes sit
- Reference points and footprint
- Not an official NANPA boundary
- Not a USPS delivery area
Cities near New Underwood
| City | Distance | ZIP codes |
|---|---|---|
| Box Elder South Dakota ZIP codes | 12 mi | 1 ZIP code |
| Rapid City South Dakota ZIP codes | 19 mi | 4 ZIP codes |
| Wasta South Dakota ZIP codes | 20 mi | 1 ZIP code |
| Hermosa South Dakota ZIP codes | 25 mi | 1 ZIP code |
| Piedmont South Dakota ZIP codes | 28 mi | 1 ZIP code |
| Wall South Dakota ZIP codes | 30 mi | 1 ZIP code |
| Keystone South Dakota ZIP codes | 32 mi | 1 ZIP code |
| Fairburn South Dakota ZIP codes | 34 mi | 1 ZIP code |
Straight-line distance between place reference points, not driving distance.