ZIP 49403 falls in Ottawa County, Michigan, where we hold 58,432 parcels measured as septic county-wide and 34,199 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 49403.
ZCTA 49403 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) |
|---|---|---|---|---|
| Ottawa County, Michigan | 89% | 24 | 58,432 | 34,199 |
| Muskegon County, Michigan | 7% | — | — | — |
| Kent County, Michigan | 4% | 3 | 48,979 | 145,669 |
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 58,432 parcels measured as septic for Ottawa County, Michigan as a whole, not broken out by ZIP.
ZIP 49403 spans 3 counties: Ottawa County, Michigan, Muskegon County, Michigan, Kent County, Michigan.