County ZIP codes · South Dakota · FIPS 46085
Lyman County, SD ZIP Codes
Lyman County, South Dakota has 9 ZIP codes (Census 2020 ZCTA-county file; GeoNames postal codes, October 2026), all residential. 6 of the residential ones lie mainly in Lyman County and 3 mainly in a neighboring county; 5 cross the county line.
- ACS2020-24
- Census2020
Where are the ZIP codes of Lyman County?
Source: U.S. Census Bureau, 2020 ZCTA cartographic boundaries; ACS 2020-2024 5-year estimates (B19013).
All 9 residential ZIP codes in Lyman County
6 ZIP codes lie mainly in Lyman County; 3 more reach into it from a neighboring county and follow the first table.
| In this county | ||||||
|---|---|---|---|---|---|---|
| 57548 | Lower Brule | 1,442 | 15 | $36k | $34k | 100% |
| 57365 | Oacoma | 599 | 10 | $76k | $218k | 100% |
| 57568 | Presho | 540 | 1 | $83k | $175k | 100% |
| 57569 | Reliance | 497 | 1 | $75k | $124k | 100% |
| 57544 | Kennebec | 421 | 2 | $79k | $142k | 94% |
| 57576 | Vivian | 205 | 1 | $100k | $220k | 91% |
Partly in Lyman County
Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates; county shares by land area (Census 2020 ZCTA-county relationship file).
Which ZIP codes cross the county line?
5 ZIP codes of Lyman County extend into another county. A ZIP code follows mail routes, not county borders.
| ZIP | In Lyman | Elsewhere |
|---|---|---|
| 57532 | 15% | Stanley County 85% |
| 57533 | 27% | Gregory County 72%; Tripp County 1% |
| 57544 | 94% | Tripp County 6% |
| 57576 | 91% | Jones County 9% |
| 57534 | 20% | Tripp County 80% |
Source: U.S. Census Bureau, 2020 ZCTA-county relationship file (shares of land area).
Which first three digits do Lyman County's ZIP codes use?
The first three digits of a ZIP code name the sectional center, the mail processing plant that sorts it. Lyman County's ZIP codes use 2 prefixes: 573 and 575.
Source: U.S. Postal Service, labeling list L005 (3-digit ZIP Code prefix groups, SCF sortation), effective October 1, 2026.