Dubuque County GIS Maps
Dubuque County, Iowa, has 99,266 residents across 53,037 parcels and covers 608.3 square miles. The population grew 6% between the 2010 and 2020 census. More residents moved in than left over that decade. The FIPS code for Dubuque County is 19061.
Dubuque is the county's largest population center. Dubuque County also includes 13 zip codes, 3 public school districts and 37 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.
Dubuque County Trends
- Population
- 99,266▴
- Median Home Value
- $226,100▴
- K-12 Enrollment
- 14,745▾
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.
Dubuque 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.
Dubuque County Parcels
Dubuque County has 53,037 mapped parcels covering 377,490 acres. The median assessed value is $194,300. The median lot size is 0.35 acres. 9,697 parcels are 10 acres or larger. The records carry 33,685 distinct owner names. Owner names and assessed values are on nearly every parcel. Site addresses reach 77.2%. Lot sizes reach 91.7%. Browse the interactive Dubuque County Parcel viewer here.
Dubuque County Parcel Data Coverage
| Field | Parcels | Coverage |
|---|---|---|
| Parcel ID | 53,037 | 100% |
| Owner name | 53,006 | 99.9% |
| Owner mailing address | 0 | 0% |
| Site address | 40,955 | 77.2% |
| Land use code | 0 | 0% |
| Land use description | 0 | 0% |
| Assessed value | 52,445 | 98.9% |
| Land value | 0 | 0% |
| Improvement value | 0 | 0% |
| Acreage | 48,616 | 91.7% |
| Parcel boundary | 53,037 | 100% |
| Download all Dubuque County parcels. | ||
Field coverage measured across all Dubuque County parcel records.
Dubuque County Population
Dubuque County had 99,266 residents in 2020. That was 6% higher than in 2010. Dubuque County added 10,123 people between 2000 and 2020, which points to steady long-term growth. The county is fairly spread out, with about 163 people per square mile. Some of the county's most populated postal areas include Dubuque, Dubuque and Dubuque.
Population Trend in Dubuque County IA
Dubuque County Population per 2000, 2010 and 2020 census counts with a baseline 2030 projection.
Dubuque County Zip Codes
Dubuque County has 13 zip codes. Some of the county's most populated zip codes include Dubuque (52001), Dubuque (52002) and Dubuque (52003). Dubuque is the largest zip by population, with about 43,572 residents or 44% of the county total. Together, the three largest zips account for about 75% of all county residents based on 2020 population estimates.
Most Populated Zip Codes in Dubuque County IA
| ZIP | Area | Population | Trend |
|---|---|---|---|
| 52001 | Dubuque | 43,572 | ▴ 0.9% |
| 52002 | Dubuque | 17,177 | ▴ 18% |
| 52003 | Dubuque | 14,060 | ▴ 4.6% |
| 52068 | Peosta | 4,835 | ▴ 23.2% |
| 52045 | Epworth | 2,739 | ▴ 5.8% |
| Download all zip code data | |||
Dubuque County Zip Code populations and trends per most recent census data.
Dubuque County Demographics
Dubuque County has a median age of 38.8, which is close to the Iowa average. About 22.7% of residents are under 18, while 18.8% 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 29.3% of the population, which points to a solid working-age base. About 32.9% 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 Dubuque County IA
Median Age
38.8
Under 18
22.7%
Age 65+
18.8%
Bachelor's+
32.9%
Dubuque County School Districts
Dubuque County is served by 3 public school districts with 14,745 students enrolled in 2024. The largest districts on the county map are Dubuque Community, Western Dubuque County Community and Maquoketa Community. Those three districts account for about 100% of public school enrollment in the map area. Total enrollment has stayed fairly steady in recent years, but it is slightly lower than it was in 2017.
Largest School Districts by Enrollment in Dubuque County IA
| District | Enrollment | Share | Trend |
|---|---|---|---|
| Dubuque Community School District | 9,843 | 66.8% | ▾ -1.3% |
| Western Dubuque County Community School District | 3,643 | 24.7% | ▴ 0.5% |
| Maquoketa Community School District | 1,259 | 8.5% | ▾ -1.6% |
| Download all school district data | |||
Dubuque County school district enrollment and trends per most recent NCES reporting data.
Dubuque County Housing & Real Estate
Dubuque County has a median home value of $226,100 and a median gross rent of $944. About 73% of occupied homes in the county are owner-occupied, so the local housing market leans heavily toward ownership. Home values run above the Iowa median, while rents come in below the state average. In March 2026, the median listing price was $321,950 and homes spent about 55 days on the market.
Dubuque County Housing Mix
Dubuque County housing mix: owner, renter and vacant units.
Dubuque County Housing Trends
Dubuque County median home value and rent trend (last 5 years).
Businesses in Dubuque County, IA
Dubuque County has 4,771 business listings across 709 categories. The largest categories in Dubuque County business listings are Auto Repair (78, 1.6%), Real Estate Agents (76, 1.6%), and Parks & Recreation (72, 1.5%). The full Dubuque County business listings dataset includes names, categories, addresses and contact details where available. Dubuque County packages also include U.S. Census County Business Patterns data with establishment counts, employment and payroll by industry sector.
Top Business Categories in Dubuque County, IA
| Category | Businesses | Share |
|---|---|---|
| Auto Repair | 78 | 1.6% |
| Real Estate Agents | 76 | 1.6% |
| Parks & Recreation | 72 | 1.5% |
| Churches & Religious Organizations | 70 | 1.5% |
| Beauty Salons | 63 | 1.3% |
| Medical Offices | 60 | 1.3% |
| Gas Stations | 60 | 1.3% |
| Insurance Agencies | 59 | 1.2% |
| Contractors | 58 | 1.2% |
| Chiropractors | 57 | 1.2% |
Dubuque County Business Listings
| Business | Category | City |
|---|---|---|
| Shot Tower | Accommodation | Dubuque |
| Honkamp | Accountant | Dubuque |
| Triple D Winter Race | Active Life | Dubuque |
| Peaceful Healing Journey | Acupuncture | Dubuque |
| Addiction Treatment Dubuque | Addiction Rehabilitation Center | Dubuque |
| Adult Warehouse | Adult Entertainment | Dubuque |
| Townsquare Media Dubuque | Advertising Agency | Asbury |
| Champions at Prescott Elementary | After School Program | Dubuque |
| Three Rivers FS | Agricultural Cooperatives | Holy Cross |
| Schmitt Implement | Agricultural Service | Holy Cross |
| Download Dubuque County business listings | ||
Dubuque County business listings sourced from Overture Maps. Includes locations with a high level of confidence.
Dubuque County Basemaps
Dubuque 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 Dubuque County Data Package
This page shows a preview of what's included in the Dubuque 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 Dubuque County. These nearby pages include the same mix of county maps, demographic summaries, school district context, housing trends and package links.