Delaware County GIS Maps
Delaware County, Iowa, has 17,488 residents across 18,196 parcels and covers 577.7 square miles. The population declined 1.6% between the 2010 and 2020 census. More residents left than arrived over that decade. The FIPS code for Delaware County is 19055.
Manchester is the county's largest population center. Delaware County also includes 9 zip codes, 7 public school districts and 32 municipalities. Those boundaries help explain why population, schools, and housing can look different from one part of the county to another. The map below shows how those county lines, zip codes, and school districts fit together, and the sections that follow use that same geography to show parcel data, population, demographics, school enrollment and housing patterns in more detail.
Maps, GIS layers, Parcels and sample data. Paid packages add full layers, analytics and database files.
Delaware County Trends
- Population
- 17,488▾
- Median Home Value
- $168,700▴
- K-12 Enrollment
- 8,178▾
County analytics dashboards with historical trends & projections included in package downloads.
Free starter access previews county maps, lightweight GIS, and sample data. Paid packages unlock full GIS layers, analytics, and database files.
Delaware County Maps
The maps below show a few of the county map styles included in our downloads. County packages include map exports in JPEG, PNG, SVG, PDF and GeoTIFF formats plus more than 20 GIS layers for mapping, research and analysis. Available layers include zip codes, area codes, subdivisions, school districts, political boundaries, roads, water features, points of interest and more.
County packages also include historical county demographics, business intelligence, analytical dashboards, AI-ready prompts, markdown files and related reference data. Everything is organized to save hours of manual work collecting current data, cleaning it and joining it together. That makes it easier to move faster on analytics, due diligence, business planning and location research. Paid packages are built for commercial use, but some package contents include source-specific attribution or notice guidance. Review Licensing & Data Source Notices.
Delaware County Parcels
Delaware County has 18,196 mapped parcels covering 366,947 acres. The median assessed value is $124,800. The median lot size is 13.50 acres. 5,784 parcels are 10 acres or larger. The records carry 9,793 distinct owner names. Owner names and assessed values are on nearly every parcel. Site addresses reach 71.8%. Lot sizes reach 59.6%. Browse the interactive Delaware County Parcel viewer here.
Delaware County Parcel Data Coverage
| Field | Parcels | Coverage |
|---|---|---|
| Parcel ID | 18,194 | 100% |
| Owner name | 18,179 | 99.9% |
| Owner mailing address | 0 | 0% |
| Site address | 13,056 | 71.8% |
| Land use code | 0 | 0% |
| Land use description | 0 | 0% |
| Assessed value | 18,091 | 99.4% |
| Land value | 0 | 0% |
| Improvement value | 0 | 0% |
| Acreage | 10,840 | 59.6% |
| Parcel boundary | 18,194 | 100% |
| Download all Delaware County parcels. | ||
Field coverage measured across all Delaware County parcel records.
Delaware County Population
Delaware County had 17,488 residents in 2020. That was 1.6% lower than in 2010. Delaware County had 916 fewer people in 2020 than it did in 2000, which points to a long-term population decline. The county is fairly spread out, with about 30 people per square mile. Some of the county's most populated postal areas include Manchester, Dyersville and Hopkinton.
Population Trend in Delaware County IA
Delaware County Population per 2000, 2010 and 2020 census counts with a baseline 2030 projection.
Delaware County Zip Codes
Delaware County has 9 zip codes. Some of the county's most populated zip codes include Manchester (52057), Dyersville (52040) and Hopkinton (52237). Manchester is the largest zip by population, with about 8,064 residents or 46% of the county total. Together, the three largest zips account for about 89% of all county residents based on 2020 population estimates.
Most Populated Zip Codes in Delaware County IA
| ZIP | Area | Population | Trend |
|---|---|---|---|
| 52057 | Manchester | 8,064 | ▾ -1.9% |
| 52040 | Dyersville | 5,911 | ▴ 7% |
| 52237 | Hopkinton | 1,593 | ▴ 4.7% |
| 52041 | Dyersville | 1,490 | ▾ -7.3% |
| 52223 | Delhi | 1,389 | ▴ 2.8% |
| Download all zip code data | |||
Delaware County Zip Code populations and trends per most recent census data.
Delaware County Demographics
Delaware County has a median age of 44, which makes the county a little older than Iowa overall. About 23.4% of residents are under 18, while 20.9% are 65 or older. That gives the county a fairly even mix of younger families and older adults. The largest age group is 25 to 44 at about 26.1% of the population, which points to a solid working-age base. About 19.7% of adults have a bachelor's degree or higher, above the statewide figure of 30.9%. The county is mostly White by population, though Hispanic, Asian, Black and multiracial residents are also part of the local mix.
Key Demographics for Delaware County IA
Median Age
44
Under 18
23.4%
Age 65+
20.9%
Bachelor's+
19.7%
Delaware County School Districts
Delaware County is served by 7 public school districts with 8,178 students enrolled in 2024. The largest districts on the county map are Western Dubuque County Community, West Delaware County Community and Monticello Community. Those three districts account for about 72% of public school enrollment in the map area. Total enrollment has stayed fairly steady in recent years, based on district totals from 2017 to 2024.
Largest School Districts by Enrollment in Delaware County IA
| District | Enrollment | Share | Trend |
|---|---|---|---|
| Western Dubuque County Community School District | 3,643 | 44.5% | ▴ 0.5% |
| West Delaware County Community School District | 1,263 | 15.4% | ▾ -3.1% |
| Monticello Community School District | 999 | 12.2% | ▾ -1.7% |
| Maquoketa Valley Community School District | 702 | 8.6% | ▴ 0.6% |
| North Linn Community School District | 550 | 6.7% | ▴ 1.7% |
| Download all school district data | |||
Delaware County school district enrollment and trends per most recent NCES reporting data.
Delaware County Housing & Real Estate
Delaware County has a median home value of $168,700 and a median gross rent of $743. About 82% of occupied homes in the county are owner-occupied, so the local housing market leans heavily toward ownership. Home values run below the Iowa median, while rents come in below the state average. In March 2026, the median listing price was $266,625 and homes spent about 38 days on the market.
Delaware County Housing Mix
Delaware County housing mix: owner, renter and vacant units.
Delaware County Housing Trends
Delaware County median home value and rent trend (last 5 years).
Businesses in Delaware County, IA
Delaware County has 806 business listings across 298 categories. The largest categories in Delaware County business listings are Churches & Religious Organizations (28, 3.5%), Parks & Recreation (18, 2.2%), and Auto Repair (16, 2.0%). The full Delaware County business listings dataset includes names, categories, addresses and contact details where available. Delaware County packages also include U.S. Census County Business Patterns data with establishment counts, employment and payroll by industry sector.
Top Business Categories in Delaware County, IA
| Category | Businesses | Share |
|---|---|---|
| Churches & Religious Organizations | 28 | 3.5% |
| Parks & Recreation | 18 | 2.2% |
| Auto Repair | 16 | 2.0% |
| Gas Stations | 15 | 1.9% |
| Convenience Stores | 14 | 1.7% |
| Insurance Agencies | 14 | 1.7% |
| Beauty Salons | 12 | 1.5% |
| Banks & Credit Unions | 10 | 1.2% |
| Real Estate Agents | 10 | 1.2% |
| Business Manufacturing And Supply | 10 | 1.2% |
Delaware County Business Listings
| Business | Category | City |
|---|---|---|
| Milestones Group | Accountant | Manchester |
| Shivani Mandal | Advertising Agency | Delhi |
| Three Rivers FS | Agricultural Cooperatives | Manchester |
| Mitch Zumbach DeKalb & Asgrow Seeds | Agricultural Seed Store | Coggon |
| Norby Farm Fleet | Agricultural Service | Manchester |
| FarmTek | Agriculture | Dyersville |
| FAST STOP - Manchester, Iowa | Agriculture Association | Manchester |
| Delaware County Iowa Emergency Management | Ambulance And Ems Services | Manchester |
| Delhi Landing | American Restaurants | Delhi |
| Delaware County Community Center Fairgrounds | Amusement Park | Manchester |
| Download Delaware County business listings | ||
Delaware County business listings sourced from Overture Maps. Includes locations with a high level of confidence.
Delaware County Basemaps
Delaware County map and data packages include a set of useful basemaps to help you get started quickly. These include a custom light grey canvas, USGS topo, imagery and other reference layers that make it easier to build clear, meaningful county maps using the included GIS layers, your own data or both. Pre-rendered map tiles for the light grey basemap are included so you can use them offline or host them on your own CDN.
Get the Full Delaware County Data Package
This page shows a preview of what's included in the Delaware County data package. The full package gives you a ready-to-use county data system with GIS layers, historical data, maps, database files and planning tools that save hours of manual data gathering, cleanup and joins. Everything is organized to help you skip data wrangling and start analysis faster.
- 20+ GIS layers for parcels, zip codes, school districts, roads, water, boundaries and more
- Historical county demographics, housing, income and trend data
- ZIP code population files and school district enrollment history
- Database files, markdowns, AI-ready prompts and documentation
- Map exports in PNG, JPEG, PDF, SVG and GeoTIFF formats
- Offline-ready data explorer, map and analytics tools
Paid packages support commercial use, client work, and derived outputs. Some package contents may include source-specific attribution or provider notices. See Licensing & Data Source Notices.
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Nearby Counties
Browse county data pages for the counties that border Delaware County. These nearby pages include the same mix of county maps, demographic summaries, school district context, housing trends and package links.