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Sioux City, IA-NE-SD

Cost of living in Union County, SD

Part of the Sioux City Metro Area

Estimated monthly cost
$2,810/mo
for a single person, all categories combined

Population 16,916 · Last updated May 21, 2026

Cost breakdown

Single person, by category, per month.

Rent $818 29%
Federal tax $618 22%
Healthcare $480 17%
Groceries $324 12%
Transport $320 11%
Energy $200 7%
Water $50 2%
State tax $0 0%

Rent in Union County

Fair Market Rents by bedroom count.

Studio
$715
per month
1 bedroom
$818
per month
2 bedroom
$1,043
per month
3 bedroom
$1,257
per month
4 bedroom
$1,383
per month

Source: HUD FMR FY2025

Income and earnings in Union County

Annual earnings figures from the Census ACS.

Household income
$84,137
per year
Individual earnings
$47,837
per year
Per capita
$49,563
per year

Source: ACS 2019-2023 5-Year.

Home values in Union County

Average values reported by homeowners.

Average home value
$269,500
Annual property tax
$2,997

Source: ACS 2019-2023 5-Year

Energy costs in Union County

Estimated monthly electricity and gas costs.

Electricity
$142
per month · 14.2¢/kWh
Natural gas
$58
per month
Annual total
$2,400
per year

Source: EIA

Healthcare in Union County

Insurance premiums and coverage rates.

Individual premium
$480
per month
Family premium
$1,350
per month
Uninsured rate
5.2%

Source: ACS + national avg. Marketplace benchmark premiums are second-lowest Silver plan estimates and do not reflect employer plans, subsidies, or out-of-pocket costs. This is not healthcare advice.

Taxes in Union County

State and local tax rates for South Dakota.

No state income tax
South Dakota does not levy a personal income tax.
State sales tax
4.2%
Combined sales tax
6.1%
incl. average local

Tax rates change. Consult a qualified tax professional for advice on your specific situation. This is not tax advice.

Transportation in Union County

Commute patterns and estimated costs.

Average commute
18.6 min
Drive alone
82.5%
Public transit
0.0%
Work from home
7.5%

Source: ACS

Monthly cost estimates for Union County

What it costs to live in Union County each month.

Single person
$2,810
per month
  • Rent $818
  • Energy $200
  • Water $50
  • Groceries $324
  • Transport $320
  • Healthcare $480
  • Federal tax $618
  • State tax $0
Couple
$4,211
per month
  • Rent $1,043
  • Energy $240
  • Water $60
  • Groceries $537
  • Transport $420
  • Healthcare $864
  • Federal tax $1,047
  • State tax $0
Family
$6,559
per month
  • Rent $1,257
  • Energy $300
  • Water $70
  • Groceries $815
  • Transport $520
  • Healthcare $1,350
  • Childcare $1,200
  • Federal tax $1,047
  • State tax $0

Frequently asked questions about Union County

Common questions about cost of living, rent and salary.

What is the average rent in Union County?

In Union County, SD, a one-bedroom apartment averages $818 per month, a two-bedroom averages $1,043 per month, a three-bedroom averages $1,257 per month, according to HUD Fair Market Rent data.

What is the average salary in Union County?

In Union County, SD, the average household income is $84,137 per year and individual earnings for full-time workers average $47,837 per year, according to U.S. Census Bureau data.

What is the cost of living in Union County?

The estimated cost of living in Union County, SD is approximately $2,810 per month for a single person, $4,211 for a couple, $6,559 for a family. This includes rent, utilities, groceries, transportation, healthcare, and taxes.

What is the sales tax rate in Union County?

The combined sales tax rate in Union County, SD is 6.10%, which includes the South Dakota state rate of 4.20% plus an average local rate of 1.90%.

Is Union County an affordable place to live?

Based on the data, a single person in Union County, SD would need approximately $2,810 per month to cover rent, utilities, food, transport, healthcare, and taxes. The average household income is $84,137 per year ($7,011 per month). Union County is relatively affordable compared to the national average.

How much does healthcare cost in Union County?

The ACA marketplace benchmark premium in Union County, SD is approximately $480 per month for an individual. Approximately 5.2% of residents are uninsured. Actual costs vary based on employer coverage, plan type, and individual circumstances.

What are house prices in Union County?

The average home value in Union County, SD is $269,500, with average annual property taxes of $2,997, according to U.S. Census Bureau data.

How does Union County compare to other areas?

You can compare Union County, SD with any other US county using our comparison tool at /compare. Union County is in the Sioux City, IA-NE-SD metro area.

Other counties in South Dakota

Browse the full list of counties in South Dakota, ranked by cost of living.

See all counties in South Dakota

Compare Union County with another area

Put two counties side by side to see how rent, taxes and everyday costs stack up.

About this data

All figures on this page come from official U.S. government sources, listed below.

  • HUD FMR FY2025
  • ACS 2019-2023 5-Year
  • EIA
  • ACS + national avg
  • ACS
  • USDA + BEA RPP
Methodology All data sources