Sales tax in Warren County, Iowa
There is no single sales tax rate in Warren County. It runs from 6% to 7% depending on the exact address, because cities and special districts inside the county levy their own on top of the 6% state rate. The 6% state rate applies everywhere in the county; everything above that depends on where you are standing.
What is the sales tax rate in Warren County?
| Iowa state rate | 6% |
|---|---|
| Warren County rate | 1% |
| Lowest combined rate in the county | 6% |
| Highest combined rate in the county | 7% |
The two combined figures are the lowest and highest totals found anywhere inside the county. They are not a state rate plus a county rate added together, and adding the rows above will not reproduce them, because cities and special districts levy in between.
Why the rate here is not the whole story
Iowa's state rate is 6 percent and local option sales tax is a flat 1 percent that each jurisdiction adopts for itself, so there is no countywide Iowa sales tax rate as such. Cities vote on it one at a time and the county board adopts it separately for the unincorporated area, and a jurisdiction can start or end the tax only on January 1 or July 1. A city whose limits cross a county line is listed once under each county and the two halves can carry different rates, so the department's listing counts it separately in each. Of the 16 cities the department lists in Warren County, 13 charge the 1 percent and Ackworth, Sandyville, Spring Hill have not, so the combined rate is 7 percent in some places in this county and 6 percent in others. The unincorporated area outside the cities has adopted it as well, so the county's own 1 percent applies to every address the department does not list under a city. Use the department's address lookup rather than a single county figure.
How do I find the exact rate for an address in Warren County?
Because the rate changes within the county, an address is the only way to get it right. Use Iowa's own lookup. A vendor's calculator is not the state speaking.
Who has to collect sales tax in Warren County?
A seller with a physical presence in Iowa collects at the rate for the address where the sale takes place. A remote seller collects once it passes Iowa's economic nexus threshold, which is a separate question from the rate and is covered on our sales tax nexus checker. Marketplace facilitators generally collect on behalf of their sellers.
How does Warren County compare?
See Iowa sales tax for the statewide picture, including the average local rate and what is exempt. Property tax is a separate tax with separate rules: property tax in Warren County.
Sources
- Warren County rates: Iowa Department of Revenue, Local Option Sales Tax jurisdiction listing, Status of All Jurisdictions effective July 1, 2026 (workbook updated June 18, 2026), https://revenue.iowa.gov/media/195/download?inline
- Collected and verified September 9, 2026. Confidence: P on the rate components, P on the range (P read on a primary agency page, S strong but indirect, U unverified).