Sweetwater County · county seat Green River
Start an LLC in Sweetwater County, Wyoming
To start an LLC in Sweetwater County, Wyoming, you file Articles of Organization with the Wyoming Secretary of State for $100; the county does not handle it. Sweetwater County's sales tax is 6 percent and its County Clerk is in Green River. Our Starter package is $149 plus the state fee.
Last verified: November 10, 2026, against official Wyoming sources.
County seat
Green River
Sales and use tax
6%
Lodging total (county)
13%
County Clerk
307-872-3732
Heads up: we are an independent company that prepares and submits Wyoming filings for owners. We are not the Wyoming Secretary of State and we do not give legal advice. Every state charge passes through at the exact amount billed, shown separately from our service fee.
Heads up: we are an independent company that prepares and submits Wyoming filings for owners. We are not the Wyoming Secretary of State and we do not give legal advice. Every state charge passes through at the exact amount billed, shown separately from our service fee.
Sweetwater County notes for business owners
Sweetwater County's seat is Green River, not Rock Springs, even though Rock Springs is the larger city. The County Clerk is in Green River on West Flaming Gorge Way. Rates are 6 percent on sales and 13 percent on lodging countywide.
Trucking companies buy fuel, parts and equipment in many places, and Wyoming use tax (W.S. 39-16) applies to items bought elsewhere without enough sales tax and brought into the state for use. Track out-of-state purchases so the use tax return is right. A trucking corporation also needs its federal registrations, which start with the EIN.
Rock Springs requires a city business license for anyone conducting business in the city, at $75 per calendar year, not prorated, filed with the City Clerk. A Rock Springs yard is inside the city, so budget that license each January.
Official sourceSweetwater County Clerk: address and contact
The Secretary of State's county clerk list places the Sweetwater County Clerk in Green River. Call ahead before a visit to confirm hours.
| Detail | Sweetwater County |
|---|---|
| Office | Sweetwater County Clerk |
| Address | 80 West Flaming Gorge Way, Suite 150, Green River, WY 82935 |
| Phone | 307-872-3732 |
| Fax | 307-872-3994 |
| Website | www.sweetwatercountywy.gov |
| County seat | Green River |
| Department of Revenue county number | 4 |
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Heads up: we are an independent company that prepares and submits Wyoming filings for owners. We are not the Wyoming Secretary of State and we do not give legal advice. Every state charge passes through at the exact amount billed, shown separately from our service fee.
Sweetwater County sales and use tax rate
On the Department of Revenue chart effective October 1, 2026, Sweetwater County (county number 4) charges 6 percent on taxable sales. On a $1,000 taxable sale, that is $60 of sales tax.
| Component | Rate |
|---|---|
| State sales and use tax | 4% |
| General purpose county option | 1% |
| Specific purpose county option | 1% |
| Sweetwater County total | 6% |
Lodging tax in Sweetwater County
One lodging rate applies across Sweetwater County:
- Sweetwater County: 13 percent in all (6 percent sales and use tax, 5 percent statewide lodging and 2 percent local lodging).
| Locality | Local lodging | Lodging plus sales total |
|---|---|---|
| Sweetwater County | 2% | 13% |
Worked example: a trucking company in Rock Springs with three tractors and leased trailers
Entity: Wyoming corporation (W.S. 17-16). The company is formed once with the Secretary of State and can then operate anywhere in Sweetwater County.
| Line | Amount |
|---|---|
| Corp USA Starter package | $149 |
| Wyoming state filing fee (Articles of Incorporation) | $100 |
| Day-one total | $249 |
| Sales tax you collect on $1,000 of taxable sales in Sweetwater County | $60 |
| First annual report license tax (most small companies) | $60 |
Statewide rules that apply in every Wyoming county
- Your LLC or corporation is filed with the Wyoming Secretary of State, not the county. The state fee is $100 for Articles of Organization or Articles of Incorporation.
- Trade names are registered with the Secretary of State under W.S. 40-2-101 through 40-2-111 for $100, not with a county clerk.
- Retail liquor sales are licensed by incorporated cities and towns inside their limits and by counties outside them (W.S. 12-4-101).
- Business personal property is listed with the county assessor each year by March 1; a written request by February 15 extends the date to April 1 (W.S. 39-13-107).
- The annual report and license tax ($60 minimum) are due on or before the first day of your company's anniversary month every year.
- Every Wyoming company keeps a registered agent at a Wyoming street address. Ours is $199 per year.
Frequently asked questions
Is Rock Springs the county seat of Sweetwater County?
No. The Secretary of State's clerk list places the Sweetwater County Clerk in Green River, the county seat.
Does Rock Springs charge a business license fee?
Yes. The City of Rock Springs charges $75 per calendar year for a business license, not prorated, apart from contractor registrations.
What is the sales tax rate in Sweetwater County, Wyoming?
6 percent on the Department of Revenue chart effective October 1, 2026.
Where is the Sweetwater County Clerk's office?
80 West Flaming Gorge Way, Suite 150, Green River, WY 82935. Phone 307-872-3732.
Ready when you are
Heads up: we are an independent company that prepares and submits Wyoming filings for owners. We are not the Wyoming Secretary of State and we do not give legal advice. Every state charge passes through at the exact amount billed, shown separately from our service fee.
Heads up: we are an independent company that prepares and submits Wyoming filings for owners. We are not the Wyoming Secretary of State and we do not give legal advice. Every state charge passes through at the exact amount billed, shown separately from our service fee.