Sales tax in ZIP 53901
5.500%
Portage city · Columbia County · as of 2026Q3
curl "https://api.deepcalc.com/v1/workbooks/sht_01kypqf6rsfesvr2hp9m5gsp0q/tables/b_nwb12r2e/rows?ref=main&col=zip&eq=53901" the xlsx export carries the grid worksheets; the big keyed blocks come over the api call above.
| field | value |
|---|---|
| zip | 53901 |
| official rate above the lowest? | no |
| share of ZIP+4 areas | 78.489% |
| main county | Columbia County |
| main city or place | Portage city |
| lowest area rate | 5.500% |
| highest area rate | 5.500% |
| rate combinations | 12 |
| official ZIP rate (Z record) | 5.000% |
| rates effective | 2026Q3 |
rate combinations in this ZIP
| county | place | districts | rate | share |
|---|---|---|---|---|
| Columbia County | Portage city | — | 5.500% | 78.490% |
| Columbia County | place 11900 | — | 5.500% | 5.630% |
| Columbia County | place 43775 | — | 5.500% | 4.810% |
| Columbia County | place 26725 | — | 5.500% | 4.140% |
| Columbia County | — | — | 5.500% | 2.420% |
| Columbia County | place 60925 | — | 5.500% | 1.960% |
| Columbia County | place 49150 | — | 5.500% | 1.490% |
| Marquette County | place 20525 | — | 5.500% | 0.600% |
| Columbia County | place 89325 | — | 5.500% | 0.330% |
| Marquette County | place 54600 | — | 5.500% | 0.070% |
| Marquette County | — | — | 5.500% | 0.030% |
| Sauk County | place 24900 | — | 5.500% | 0.030% |
Why one ZIP can have several rates
A ZIP code is a mail-delivery route, not a tax boundary, so a single ZIP can straddle several taxing jurisdictions. The breakdown below is a share of the ZIP+4 AREAS inside the ZIP — not of addresses, households or customers. The dominant rate is the one covering the most areas. Counties and places are named from the census gazetteer; a code a state files that matches no census place stays a code, and special district codes are the state's own identifiers with no published names anywhere, so they always stay as codes.
When the official answer sits above the lowest rate
The streamlined sales tax five-digit (Z) record is the answer a seller may rely on for a ZIP. The convention is that it carries the lowest rate in the ZIP, but Nebraska, South Dakota, Washington and Kansas publish Z records above their own minimum area rate. Those ZIPs are flagged so the difference is visible rather than silently averaged away.
Where these numbers come from
Rates and boundaries are the states' own statutory files, published by the Streamlined Sales Tax Governing Board, plus the CDTFA rate table for California. Every file is cited with its URL, its blake3 hash and the moment it was retrieved.