ZIP 71603 falls in Jefferson County, Arkansas, where we hold 6,142 parcels measured as septic county-wide and 17,047 on sewer. We do not have a per-ZIP parcel count for this county, so this is the county total, not a count specific to ZIP 71603.
ZCTA 71603 is not entirely inside one county. Land-area share is from the 2020 Census ZCTA-to-county relationship file.
| County | Land in this ZIP | Documents held | On septic (county) | On sewer (county) |
|---|---|---|---|---|
| Jefferson County, Arkansas | 85% | — | 6,142 | 17,047 |
| Lincoln County, Arkansas | 8% | — | 3,305 | 763 |
| Cleveland County, Arkansas | 5% | — | 1,854 | 98 |
| Grant County, Arkansas | 2% | — | 4,546 | 1,609 |
Land-area overlap is from the 2020 Census Bureau ZCTA5-to-county relationship file, not an estimate of ours. Parcel and document counts are rows we hold, not a survey of every property in the ZIP. Last verified 2026-09-01.
We hold 6,142 parcels measured as septic for Jefferson County, Arkansas as a whole, not broken out by ZIP.
ZIP 71603 spans 4 counties: Jefferson County, Arkansas, Lincoln County, Arkansas, Cleveland County, Arkansas, Grant County, Arkansas.