Zip Code 51638 — Essex, IA
51638 is a ZIP Code associated with Essex, IA, located within Page. 51638 ranks #3 out of 10 ZIP codes in Page County by population (and #401 out of 970 in IA). The area supports an estimated population of 1,258 residents across Data Pending housing units, with a population density of 6.0 people per square mile.
WorldPlaceData database updated: October 2026
📍 View location on OpenStreetMap (40.839190, -95.266630)
| Data Metric | Local Statistic |
|---|
| Postal / Zip Code | 51638 |
| Primary City | Essex |
| State / Province | IA |
| County | Page |
| Total Population | 1,258 |
| Median Household Income | Data Pending |
| Total Housing Units | Data Pending |
| Population Density | 6.0 people/sq mi |
| Timezone | America/Chicago |
How 51638 Compares
| Metric | ZIP 51638 | Page County | IA State Average |
|---|
| Population | 1,258 | 14,953 (Total) | 3,210,984 (Total) |
| Average ZIP Income | Data Pending | N/A | N/A |
| Population Density | 6.0 /sq mi | -- | -- |
| County Pop Rank | #3 of 10 | -- | -- |
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 →