Mills, Wyoming sales tax rate: 5%
Last updated Checked monthly
The sales tax rate in Mills, Wyoming is 5%. That’s the 4% state rate plus 1% in local taxes. It’s higher than 1 of the 13 Wyoming cities we checked, and 6 other cities pay the same.
Calculated by the 
Sales Tax APIThe same engine Zamp customers use.Mills combined rate
5%
- Wyoming state
- 4%
- Natrona CountyCounty
- 1%
Mills sales tax calculator
Enter a price and what you’re selling.
- WyomingState · 4%$4.00
- Natrona CountyCounty · 1%$1.00
Charging this at checkout? Zamp calculates it on every order and files the returns.
Book a demoMills sales tax rate breakdown
State and county taxes add up to 5%.
| Jurisdiction | Type | Rate |
|---|---|---|
| State of Wyoming | State | 4% |
| Natrona County | County | 1% |
| Combined rate | 5% |
Rate history
- July 20235%
- July 20245%
- July 20255%
- July 20265%
- Today5%
No change since July 2023.
Charge the right rate in Mills, on every order.
Zamp calculates tax at each customer’s address, then files and pays every Wyoming return for you, with a sales tax team you can call.
Mills sales tax questions.
Still have questions? Call us at 1-866-438-9267 or email us at support@zamp.com.
What is the sales tax rate in Mills, Wyoming?
The combined sales tax rate in Mills is 5% as of November 3, 2026. It’s made up of 4% Wyoming state tax, 1% Natrona County.
Does the sales tax rate vary within Mills?
Mills has no special-district taxes, so most addresses in the city pay the same 5%: Wyoming’s 4% plus 1% county tax. This rate was calculated for Mills’s 82644 ZIP code; the calculator prices any exact address.
Is SaaS taxable in Mills?
No.
Do online sellers have to collect sales tax in Mills?
Yes, if they have nexus in Wyoming: more than $100,000 in Wyoming sales in the previous or current calendar year, or a physical presence in the state. They register with the Wyoming Department of Revenue and charge the rate at the buyer’s address.
Sources. Wyoming Department of Revenue · Zamp Sales Tax API, for Mills’s 82644 ZIP code. Rates are checked monthly and are for information, not tax advice.
Sales tax, off your plate.
Zamp registers you, calculates every order at the customer’s address, files every Wyoming return and handles notices, with a sales tax team you can call.
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