Zip Code 49401 — Allendale, MI
49401 is a ZIP Code associated with Allendale, MI, located within Ottawa. 49401 ranks #4 out of 16 ZIP codes in Ottawa County by population (and #88 out of 992 in MI). The area supports an estimated population of 29,674 residents across Data Pending housing units, with a population density of 359.0 people per square mile.
WorldPlaceData database updated: October 2026
📍 View location on OpenStreetMap (42.976300, -85.956040)
| Data Metric | Local Statistic |
|---|
| Postal / Zip Code | 49401 |
| Primary City | Allendale |
| State / Province | MI |
| County | Ottawa |
| Total Population | 29,674 |
| Median Household Income | Data Pending |
| Total Housing Units | Data Pending |
| Population Density | 359.0 people/sq mi |
| Timezone | America/Detroit |
How 49401 Compares
| Metric | ZIP 49401 | Ottawa County | MI State Average |
|---|
| Population | 29,674 | 283,555 (Total) | 10,077,716 (Total) |
| Average ZIP Income | Data Pending | N/A | N/A |
| Population Density | 359.0 /sq mi | -- | -- |
| County Pop Rank | #4 of 16 | -- | -- |
Nearby ZIP Codes
Data Sources & Methodology: Geographic coordinates and ZIP Code assignments are derived from underlying geographic and postal datasets. Note that ZIP Codes are USPS postal delivery areas, while Census ZCTAs are statistical approximation areas. Read full methodology →