ZIP 98229 falls in Whatcom County, Washington, where we hold 24,490 parcels measured as septic county-wide and 47,647 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 98229.
ZCTA 98229 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) |
|---|---|---|---|---|
| Whatcom County, Washington | 95% | 158,422 | 24,490 | 47,647 |
| Skagit County, Washington | 5% | 17,997 | 18,281 | 24,293 |
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 24,490 parcels measured as septic for Whatcom County, Washington as a whole, not broken out by ZIP.
ZIP 98229 spans 2 counties: Whatcom County, Washington, Skagit County, Washington.