Union County, SD ZIP Codes
8 ZIP codes cover all or part of Union County, South Dakota: 57049, 57004, 51023, 57025, 51001, 57038, 57001 and 57010. The Census Bureau counts 17,081 residents in the county, with a median household income of $89,636 and a median home value of $301,100. Median household income ranges from $69,531 in 57001 to $106,250 in 57038. Its largest communities include Dakota Dunes, North Sioux City, Elk Point, Alcester and Jefferson.
Union County (Census county figures)
| Measure | Census figure |
|---|---|
| Residents | 17,081 |
| Households | 7,310 |
| Median household income | $89,636 |
| Median home value | $301,100 |
| Median age | 41.5 |
| Median rent | $1,069 |
All 8 ZIP codes together
| Measure | Value |
|---|---|
| Residents (sum of ZIP codes) | 24,822 |
| Households (sum of ZIP codes) | 10,196 |
| Median household income, range across ZIP codes | $69,531 (57001) to $106,250 (57038) |
| Household-weighted average of ZIP medians (an approximation, not a true median) | $88,687 |
| Homeowners | 73.6% |
| Households with kids under 18 | 30.9% |
| Moved in the past year | 12.4% |
| Carrier routes in EDDM2GO's route library | 8 routes, 2,336 homes (3 of 8 ZIP codes) |
Top facts
- Highest median household income in Union County: 57038 ($106,250)
- Most residents: 57049 (7,962 people)
- Highest homeownership: 57038 (91.7% own their home)
- Most households with kids: 57004 (36.7% of households)
- Most new movers: 51023 (18.5% moved in last year)
- Youngest median age: 51023 (36.9 years)
- Highest median home value: 57049 ($432,100)
Every ZIP code in Union County
| ZIP | Mailing city | Residents | Households | Median income | Home value | Homeowners | With kids | New movers | Carrier routes | Mailboxes | Why listed |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 57049 | North Sioux City | 7,962 | 3,504 | $93,134 | $432,100 | 62.7% | 29.0% | 16.6% | — | — | 100% of its land |
| 57004 | Beresford | 3,834 | 1,506 | $88,750 | $264,100 | 83.5% | 36.7% | 8.4% | 5 | 1,587 | 27% of its land |
| 51023 | Hawarden | 3,473 | 1,236 | $80,357 | $173,300 | 70.9% | 33.3% | 18.5% | — | — | 30% of its land |
| 57025 | Elk Point | 3,120 | 1,242 | $94,839 | $237,900 | 83.2% | 35.3% | 5.4% | — | — | 100% of its land |
| 51001 | Akron | 2,342 | 1,041 | $75,404 | $192,700 | 76.1% | 24.6% | 13.7% | — | — | 40% of its land |
| 57038 | Jefferson | 1,796 | 736 | $106,250 | $332,300 | 91.7% | 27.4% | 4.3% | 2 | 594 | 100% of its land |
| 57001 | Alcester | 1,540 | 633 | $69,531 | $177,400 | 75.0% | 26.5% | 10.0% | — | — | 93% of its land |
| 57010 | Burbank | 755 | 298 | $93,611 | $296,400 | 66.1% | 34.6% | 9.8% | 1 | 271 | 31% of its land |
A ZIP code is listed for Union County when at least 10% of its land is in the county, when it holds at least 10% of the county's land, or when the county is its main county. Totals add up whole ZIP codes, including parts that cross the county line; the Census county figures above do not.
Cities and communities
- Dakota Dunes — 3,936 residents · 1 ZIP code
- North Sioux City — 3,045 residents · 1 ZIP code
- Elk Point — 2,537 residents · 1 ZIP code
- Alcester — 989 residents · 1 ZIP code
- Jefferson — 554 residents · 1 ZIP code
- Richland — 107 residents · 1 ZIP code
Rankings
- Richest ZIP codes in Union County — 7 ZIP codes ranked
- ZIP codes with the highest home values in Union County — 7 ZIP codes ranked
- ZIP codes with the highest homeownership in Union County — 7 ZIP codes ranked
- ZIP codes with the most families with kids in Union County — 7 ZIP codes ranked
- ZIP codes with the most new movers in Union County — 7 ZIP codes ranked
- Youngest ZIP codes in Union County — 7 ZIP codes ranked
- Oldest ZIP codes in Union County — 7 ZIP codes ranked
- Fastest-growing ZIP codes in Union County — 7 ZIP codes ranked
Price a mailing to Union County ZIP codes
EDDM guides
Pick carrier routes on the EDDM route map
Frequently asked questions
- What ZIP codes are in Union County, SD?
- 57049, 57004, 51023, 57025, 51001, 57038, 57001 and 57010. Some cross the county line; the table shows each ZIP's share of land in the county.
- What is the population of Union County?
- 17,081 residents in 7,310 households (ACS 5-year estimates, 2020–2024).
- What is the median household income in Union County?
- $89,636 for the county as a whole. Its ZIP codes range from $69,531 (57001) to $106,250 (57038).
- Which Union County ZIP code has the highest median household income?
- 57038, at $106,250, among ZIP codes with at least 1,000 residents. See the full ranking of Union County ZIP codes by income.
- How many carrier routes and mailboxes are in Union County?
- For the 3 of 8 ZIP codes in EDDM2GO's stored route library: 8 carrier routes reaching 2,336 residential and 116 business mailboxes. The route map loads the rest when you search them.
This product uses the Census Bureau Data API but is not endorsed or certified by the Census Bureau.