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  3. Union County, SD
South Dakota (SD)Sioux City605

Union County, SD

Sioux City metro * 18.3K residents

Compare

18.3K

Population

$91.8K

Median income

per household

$332.3K

Home value

5.8%

Poverty rate

What stands out

  • Median household income: $91.8K (top 10% vs US counties).
  • Median home value: $332.3K (top quartile vs US counties).
  • Poverty rate: 5.8% (low poverty; bottom 10% vs US counties).

Categories vs U.S.

Economy

4 of 6 metrics better than U.S. benchmarks

Median household income

$91.8K

U.S.

$81K

Median home value

$332.3K

U.S.

$333K

Poverty rate

5.8%

U.S.

12.4%

Housing stress

Rent-burdened renters (≥30%)

35.6%

U.S.

51.1%

Severely rent-burdened (≥50%)

15.2%

U.S.

25.9%

Affordability Ratios

Rent-to-Income

13.4%

Below 30% threshold

Home-Value-to-Income

3.6×

Within typical 3-5x range

Income distribution

Share of households by income bracket (ACS).

< $50k
24.3%
$50–100k
31.5%
$100–200k
31.0%
$200k+
13.3%
See Sioux City metro economy →See SD state economy →

Health

5 of 6 available metrics better than U.S.

Obesity

31.2%

U.S.

33.2%

Diabetes

10.6%

U.S.

12.1%

Current smoking

12.8%

U.S.

12.8%

See Sioux City metro health data →See SD state health data →

Connectivity

2 of 3 metrics better than U.S.

Best available speed

1,000Mbps

Gigabit speeds reported

100+ Mbps coverage

84.8%

U.S.

85.3%

Gigabit ready

24.3%

U.S.

8.6%

5G available

89.7%

U.S.

77.4%

See Sioux City metro connectivity →See SD state connectivity →

Map

Union County, SD

Population

18.3K

Area

460.8 sq mi

Density

39.6/sq mi

Neighbors

Plymouth County, IASioux County, IAWoodbury County, IADakota County, NEDixon County, NEClay County, SDLincoln County, SD
Data Sources & Notes

Data freshness

ACS 5-year
2020–2024
CDC PLACES
2025
BLS (LAUS)
2025-12
Broadband
2020-12
Mobile coverage
2025-11-24
Page updated
2026-02-23

Release schedule and upstream dates: Sources.

Data sources

U.S. Census (ACS 5-year)U.S. Census TIGER/LineCDC PLACESBLS (LAUS)FCC (Form 477 broadband)FCC (Mobile Broadband Data Collection)

Derived statistics

  • ACS county metrics (income, housing, demographics) are sourced directly from Census county-level tables.
  • CDC health metrics are sourced from county-level CDC PLACES data.
  • Unemployment is sourced from the BLS Local Area Unemployment Statistics (LAUS) program.
  • Population density is computed as population ÷ land area.

Data accuracy & methodology

County pages use 2020–2024 ACS 5-year county-level estimates sourced directly from Census county tables. CDC health metrics come from county-level CDC PLACES. Unemployment rates come from the BLS LAUS program. Connectivity metrics use FCC coverage data.