Delaware County, IA ZIP codes
There are 9 ZIP codes in Delaware County, IA, in 9 towns, from 52036 to 52330. The largest are 52057 (Manchester), 52040 (Dyersville) and 52041 (Earlville).
The county seat is Manchester.
- ZIP codes
- 9
- Towns
- 9
- County seat
- Manchester
- County FIPS
19055- State
- Iowa
- Population
- 17,558
- Median household income
- $74,989
- Land area
- 578 sq mi
- Area code
- 563
Delaware County ZIP codes by town
- Manchester (county seat)
- 52057
Each ZIP code is listed under the county most of its land lies in and the town the Postal Service names it for; a ZIP code's own page shows exactly how it is split.
Map of Delaware County ZIP codes
The ZIP codes of Delaware County, shaded. Outlines are Census ZIP Code Tabulation Areas (2020), which approximate the mail routes; PO-box and single-address codes have no area and are not drawn. Click any area to open its ZIP code.
Delaware County in numbers
About 17,558 people live in Delaware County, in 7,369 households, the 40th most populous of Iowa's 99 counties. The median household income is $74,989 a year, about the same as the Iowa median of $75,059 (US: $80,734). The median owner-occupied home is valued at $177,900 (14% below the Iowa median), and median gross rent is $764 a month. The median age is 43.4; 22.6% of adults 25 and over hold a bachelor's degree or higher (31.4% across Iowa); the average commute takes 20 minutes.
| Population | 17,558 |
|---|---|
| Households | 7,369 |
| Median age | 43.4 |
| Median household income | $74,989 |
| Median home value | $177,900 |
| Median gross rent | $764 |
| Bachelor's degree or higher | 22.6% |
| Mean commute | 20.3 min |
| Population density | 30 / sq mi |
U.S. Census Bureau, American Community Survey 2020–2024 5-year estimates. Survey estimates carry margins of error, wider for small places. Sources and methods.
Largest towns in Delaware County
| Town | ZIP codes | Population |
|---|---|---|
| Manchester | 1 | 5,191 |
| Dyersville | 1 | 4,423 |
| Earlville | 1 | 868 |
| Hopkinton | 1 | 676 |
| Delhi | 1 | 432 |
| Ryan | 1 | 346 |
| Greeley | 1 | 252 |
| Dundee | 1 | 177 |
| Delaware | 1 | 138 |
Population of the census place of that name where there is one, otherwise of the ZIP codes the Postal Service addresses by it. A town's ZIP codes can reach past the county line.
Neighbouring counties
Counties that share a ZIP code with Delaware County.
- Linn County (30)
- Dubuque County (15)
- Jones County (11)
- Buchanan County (10)
- Fayette County (15)
- Clayton County (15)
Not sure you are in Delaware County? What county am I in? answers from your location, near a county line included.
Every ZIP code in Delaware County, with figures
| ZIP | City | Type | Population | Median income | Median home |
|---|---|---|---|---|---|
52036 | Delaware , IA | Standard | 135 | $85,208 | $144,100 |
52038 | Dundee , IA | Standard | 463 | $56,250 | $165,000 |
52040 | Dyersville , IA | Standard | 5,584 | $84,761 | $242,300 |
52041 | Earlville , IA | Standard | 1,468 | $89,697 | $188,800 |
52050 | Greeley , IA | Standard | 422 | $67,206 | $231,900 |
52057 | Manchester , IA | Standard | 8,193 | $69,635 | $184,300 |
52223 | Delhi , IA | Standard | 1,199 | $89,250 | $204,000 |
52237 | Hopkinton , IA | Standard | 1,830 | $84,063 | $166,800 |
52330 | Ryan , IA | Standard | 940 | $86,536 | $260,600 |
Cite this page
zipcodes.pro. “Delaware County ZIP codes.” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/state/ia/county/delaware
Underlying data is public domain or openly licensed — sources, vintages and licences.