Union
Source:
South Dakota
Union is a sparsely populated county in South Dakota with 4 ZIP codes, 11,923 people, and upper-quartile household income among US counties. All data is sourced from the U.S. Census Bureau American Community Survey (ACS) 2023 5-Year Estimates.
National county placement
According to ACS 5-Year Estimates, Union, SD sits among US counties with an upper-quartile household income, on a sparsely populated county population base, across a handful of delivery areas.
- Top 11%
- household income vs 3,210 US counties
- 11,923
- combined ZIP population
- 4
- USPS ZIP codes covered
- $90,939
- avg ZIP median income
Income percentile ranks this county's average ZIP median household income against 3,210 US counties with ACS income on at least one ZIP.
Union lands in the national county income distribution as upper-quartile household income on sparsely populated county footing (FIPS 46127, 4 ZIPs, combined population 11,923). On this short ZIP list the county page is mainly the FIPS bridge - household ACS fields live on the primary ZIP.
High income on only 4 ZIPs: the county page and the ZIP page nearly describe the same place. Prefer the ZIP detail for ACS household fields; keep this page for the FIPS join to county-level rents and crime tables.
Population sits in the five-to-twenty-five thousand band with few ZIPs - still ZIP-first for household fields, but the county seat ZIP (usually the densest row) is worth a second glance before the FIPS overlays.
Within South Dakota, Hamlin is the closest lower-income county and Lincoln the closest higher-income county by average ZIP household income. Their 6 and 7 ZIP footprints are the immediate statewide comparison set for Union. Use those locations as statewide context before treating the county average as a local-market answer.
4
Total ZIPs
11,923
Total Population
ZIP Codes in Union
Side-by-side: Compare 57049 vs 57025 →
Frequently Asked Questions
What is the population of Union?
Union has a total population of 11,923 across 4 ZIP codes, based on U.S. Census Bureau ACS 2023 data.
What ZIP codes are in Union?
Union includes 4 ZIP codes: 57049, 57025, 57001, 57038.