What is the sales tax rate in Sioux City, Iowa?

The combined sales tax rate in Sioux City, Iowa is 7.000% as of 2026. This includes the Iowa state rate of 6.000% plus local jurisdiction taxes.

How is the Sioux City sales tax calculated?

Multiply your purchase amount by 7.000% (or 0.00700) to get the tax owed. For example, a $100 purchase incurs $7.00 in sales tax.

What is the Iowa state sales tax rate?

The base Iowa state sales tax rate is 6.000%. Local jurisdictions may add additional taxes on top of this rate.

Does Sioux City have a county sales tax?

Sioux City imposes an additional county-level sales tax of 1.000% on top of the state rate.

When was the Sioux City sales tax rate last updated?

The Sioux City sales tax rate was last verified on March 27, 2026. We cross-reference all rates against the official State Department of Revenue data.

Live Data: April 2026

Sioux City, IA Sales Tax Rate 2026

The combined sales tax rate in Sioux City, Iowa is 7.000%.

Combined Rate 7.000%

State6.000% County1.000%

Sioux City Sales Tax Breakdown

Jurisdiction	Rate
Iowa State Sales Tax	6.000%
County Sales Tax	1.000%
Total Combined Rate	7.000%

Which County Is Sioux City In?

Sioux City falls within Woodbury, Iowa. Woodbury imposes a 1.000% county-level sales tax in addition to the Iowa state base rate.

Sioux City ZIP Codes

The following ZIP codes are mapped to Sioux City for sales tax purposes. All listed codes apply the 7.000% combined rate.

51101 51103 51104 51105 51106 51108 51109 51111

Nearby Tax Rates

Sergeant Bluff 7.1 mi

7.000%

Combined Rate

View Local Rates

Business Nexus in Iowa

Economic Nexus Threshold

Selling into Iowa from out of state? Once you exceed $100,000 in annual sales or 200 transactions, you must register and collect Iowa sales tax.

FAQ: Sioux City Sales Tax

The combined sales tax rate in Sioux City, Iowa is 7.000% as of 2026.

Multiply your purchase price by 7.000% to find the tax owed. A $500 purchase would include $35.00 in sales tax.

Groceries are generally taxable in Iowa. Check the official Department of Revenue for specific exemptions.

Vehicle purchases in Sioux City are subject to the 7.000% combined rate, though some states apply different rules for vehicle sales. Verify with the Iowa Department of Revenue or DMV.

Register for a sales tax permit through the official Iowa Department of Revenue website. Registration is typically free and required before collecting any sales tax.

Sales Tax Calculator

Using 7.000% rate for Sioux City, IA

Purchase Amount ($)

Tax Amount $0.00

Total with Tax $100.00

Rate applied: 7.000% combined

Official Tax Authority

Iowa Department of Revenue

Filing Deadline: Monthly returns due the last day of the following month. File via GovConnectIowa.

Visit Official Portal (515) 281-3114