Delaware County, Iowa ZIP codes
9 ZIP codes are in Delaware County, plus 8 that cross in from neighboring counties.
- ZIP codes
- 9
- Population in these ZIPs
- 20,234
- Avg. median income
- $78,300population-weighted
- Cities & towns
- 9
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ZIP codes in Delaware County
| ZIP code | City | Population | Median income | Typical home value |
|---|---|---|---|---|
| 52036 | Delaware | 135 | $85,208 | $144,100 |
| 52038 | Dundee | 463 | $56,250 | $237,700 |
| 52040 | Dyersville | 5,584 | $84,761 | $290,400 |
| 52041 | Earlville | 1,468 | $89,697 | $242,100 |
| 52050 | Greeley | 422 | $67,206 | $260,900 |
| 52057 | Manchester | 8,193 | $69,635 | $231,300 |
| 52223 | Delhi | 1,199 | $89,250 | $267,600 |
| 52237 | Hopkinton | 1,830 | $84,063 | $253,600 |
| 52330 | Ryan | 940 | $86,536 | $266,900 |
ZIP codes partly in Delaware County
These ZIP codes are mostly in a neighboring county but cover part of Delaware County.
| ZIP code | City | County | Population | Median income | Typical home value |
|---|---|---|---|---|---|
| 50654 | Masonville | Buchanan County | 275 | $53,264 | $305,800 |
| 52035 | Colesburg | Clayton County | 1,331 | $62,109 | $260,500 |
| 52042 | Edgewood | Clayton County | 1,804 | $95,833 | $313,100 |
| 52065 | New Vienna | Dubuque County | 671 | $99,250 | $326,600 |
| 52076 | Strawberry Point | Clayton County | 2,258 | $72,857 | $294,500 |
| 52078 | Worthington | Dubuque County | 870 | $97,778 | $319,600 |
| 52218 | Coggon | Linn County | 1,413 | $82,344 | $242,100 |
| 52310 | Monticello | Jones County | 6,450 | $86,080 | $240,400 |
Population and median household income: ACS 2020–2024 5-year estimates. Typical home value: Zillow Home Value Index (September 2026) where available, otherwise the ACS median owner-reported value. "PO Box" marks ZIP codes with no delivery area of their own. Methodology
Cities and towns in Delaware County
Nearby counties
Frequently asked questions
How many ZIP codes are in Delaware County, Iowa?
9 ZIP codes are mainly in Delaware County, and 8 more ZIP codes from neighboring areas reach partly into it.
What cities are in Delaware County?
ZIP codes in Delaware County use the city names Delaware, Delhi, Dundee, Dyersville, Earlville, Greeley, Hopkinton, Manchester and Ryan.