Iowa Sales Tax Rates by City & County

Polk County has a combined sales tax rate of 7.00%, per the official Streamlined Sales Tax data as of 2026-08-04. It's the largest jurisdiction in this data set by ZIP-code coverage, used here as the best available size proxy since the SST files don't publish population figures.

A combined rate is a stack, not a single number: the state's own component (6.00% per this data set) plus whatever the county, city, and any special district (transit, tourism, public safety) each add on top. ZIP codes were drawn by the Postal Service to route mail, not to follow city or county lines, so a single ZIP can straddle more than one of those taxing boundaries — which is why the ZIP-code calculator above sometimes shows a range instead of one figure.

The underlying data set was last pulled 2026-08-04. This site checks for a refresh monthly, but the Streamlined Sales Tax Governing Board itself only republishes member-state rate and boundary files on a quarterly cadence (ahead of each calendar quarter, with mid-quarter corrections when a jurisdiction changes its rate) — so most months there is nothing new to pull.

Yes, in at least some jurisdictions. The official data records a separate groceries/drugs rate for 120 of the jurisdictions on this page — for example Adair County charges 6.00% on general purchases but 0.00% on qualifying groceries and drugs. Where no separate figure appears in the tables below, this data set doesn't record a grocery carve-out different from the general rate for that jurisdiction.

Adair County (Adair County), at 7.00% combined, per the official Streamlined Sales Tax data as of 2026-08-04. At the other end, Adair County sits at 6.00% — see the highest & lowest table below for the full top-10 spread each way.