Zip Code 51038 — Merrill, IA
51038 is a ZIP Code associated with Merrill, IA, located within Plymouth. 51038 ranks #8 out of 11 ZIP codes in Plymouth County by population (and #358 out of 970 in IA). The area supports an estimated population of 1,449 residents across Data Pending housing units, with a population density of 6.3 people per square mile.
WorldPlaceData database updated: October 2026
📍 View location on OpenStreetMap (42.705600, -96.315690)
| Data Metric | Local Statistic |
|---|
| Postal / Zip Code | 51038 |
| Primary City | Merrill |
| State / Province | IA |
| County | Plymouth |
| Total Population | 1,449 |
| Median Household Income | Data Pending |
| Total Housing Units | Data Pending |
| Population Density | 6.3 people/sq mi |
| Timezone | America/Chicago |
How 51038 Compares
| Metric | ZIP 51038 | Plymouth County | IA State Average |
|---|
| Population | 1,449 | 34,178 (Total) | 3,210,984 (Total) |
| Average ZIP Income | Data Pending | N/A | N/A |
| Population Density | 6.3 /sq mi | -- | -- |
| County Pop Rank | #8 of 11 | -- | -- |
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 →