Union County
•
South Dakota (SD)
6 ZIP Code
Streamlined Sales Tax (SST) Member
Union County, SD Sales Tax Rates 2026
2026 sales tax rate guide for Union County, SD. Average combined tax rate is 5.53% with local jurisdictions ranging up to 6.20%.
Average Combined Rate
5.53%
Estimated Tax Range: 4.20% - 6.20%
⚡ Direct Tax Answer & Key Takeaway
As of 2026, the local county sales tax rate in Union County (South Dakota) is 0.00%. Combined sales tax rates across cities in this county range from 4.20% to 6.20% (averaging 5.53%).
County Tax
0.00%
Average Combined Rate
5.53%
Max Local Rate
6.20%
Indexed Cities
5
Cities & Towns in Union County
| City | Combined Sales Tax Rate | Action |
|---|---|---|
| North Sioux City | 6.20% | View Tax Rates → |
| Elk Point | 6.20% | View Tax Rates → |
| Beresford | 6.20% | View Tax Rates → |
| Alcester | 4.20% | View Tax Rates → |
| Jefferson | 4.20% | View Tax Rates → |
📋 State Tax Rules & Compliance Guide
Sourcing Rule:
Destination-based
Groceries & Food:
Exempt (0% Tax)
Clothing & Apparel:
Taxable at standard rate
SaaS & Digital Goods:
Non-Taxable
Economic Nexus Threshold:
$100,000 in sales or 200 separate transactions
Official Tax Authority:
South Dakota Department of Revenue ↗
Interactive Sales Tax Calculator
Calculate exact sales tax and total purchase price instantly.
Address-Specific Rates
SST Member
Standard State
Rates current for 2026
$
$
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State Tax:
Combined Sales Tax Rate:
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County Tax ()
City Tax ()
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Total Purchase Price
ZIP Codes in Union County
❓ Frequently Asked Questions
Key questions and answers regarding sales tax rates, exemptions, and compliance.