Oakland County GIS Maps
Oakland County, Michigan, has 1,274,395 residents and covers 867.4 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 Oakland County is 26125.
Troy is the county's largest population center. Oakland County also includes 68 zip codes, 35 public school districts and 74 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 population, demographics, school enrollment and housing patterns in more detail.
Maps, GIS layers and sample data. Paid packages add full layers, analytics and database files.
Oakland County Trends
- Population
- 1,274,395▴
- Median Home Value
- $320,400▴
- K-12 Enrollment
- 190,079▾
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.
Oakland 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.
Oakland County Population
Oakland County had 1,274,395 residents in 2020. That was 6% higher than in 2010. Oakland County added 80,239 people between 2000 and 2020, which points to steady long-term growth. The county is fairly spread out, with about 1,469 people per square mile. Some of the county's most populated postal areas include Rochester Hills, South Lyon and Troy.
Population Trend in Oakland County MI
Oakland County Population per 2000, 2010 and 2020 census counts with a baseline 2030 projection.
Oakland County Zip Codes
Oakland County has 68 zip codes. Some of the county's most populated zip codes include Rochester Hills (48307), South Lyon (48178) and Troy (48073). Rochester Hills is the largest zip by population, with about 44,673 residents or 4% of the county total. Together, the three largest zips account for about 9% of all county residents based on 2020 population estimates.
Most Populated Zip Codes in Oakland County MI
| ZIP | Area | Population | Trend |
|---|---|---|---|
| 48307 | Rochester Hills | 44,673 | ▴ 8% |
| 48178 | South Lyon | 36,858 | ▴ 25.7% |
| 48073 | Troy | 33,658 | ▴ 2.6% |
| 48322 | West Bloomfield | 32,188 | ▴ 3% |
| 48309 | Rochester Hills | 31,541 | ▴ 8.3% |
| Download all zip code data | |||
Oakland County Zip Code populations and trends per most recent census data.
Oakland County Demographics
Oakland County has a median age of 41.2, which makes the county a little older than Michigan overall. About 20.5% of residents are under 18, while 17.9% 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 32.6% of the population, which points to a solid working-age base. About 50.2% of adults have a bachelor's degree or higher, above the statewide figure of 31.8%. The county is majority White by population, with Hispanic, Asian, Black and multiracial residents making up a meaningful share of the local mix.
Key Demographics for Oakland County MI
Median Age
41.2
Under 18
20.5%
Age 65+
17.9%
Bachelor's+
50.2%
Oakland County School Districts
Oakland County is served by 35 public school districts with 190,079 students enrolled in 2024. The largest districts on the county map are Rochester Community, Warren Consolidated Schools and Walled Lake Consolidated Schools. Those three districts account for about 20% 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 Oakland County MI
| District | Enrollment | Share | Trend |
|---|---|---|---|
| Rochester Community School District | 14,496 | 7.6% | ▾ -1% |
| Warren Consolidated Schools | 12,338 | 6.5% | ▾ -1% |
| Walled Lake Consolidated Schools | 11,640 | 6.1% | ▾ -1.1% |
| Troy School District | 11,596 | 6.1% | ▾ -0.9% |
| Farmington Public School District | 8,983 | 4.7% | ▾ -0.1% |
| Download all school district data | |||
Oakland County school district enrollment and trends per most recent NCES reporting data.
Oakland County Housing & Real Estate
Oakland County has a median home value of $320,400 and a median gross rent of $1,319. About 72% of occupied homes in the county are owner-occupied, so the local housing market leans heavily toward ownership. Home values run above the Michigan median, while rents come in above the state average. In March 2026, the median listing price was $394,500 and homes spent about 39 days on the market.
Oakland County Housing Mix
Oakland County housing mix: owner, renter and vacant units.
Oakland County Housing Trends
Oakland County median home value and rent trend (last 5 years).
Businesses in Oakland County, MI
Oakland County has 56,620 business listings across 1,278 categories. The largest categories in Oakland County business listings are Real Estate Agents (1,358, 2.4%), Beauty Salons (792, 1.4%), and Insurance Agencies (785, 1.4%). The full Oakland County business listings dataset includes names, categories, addresses and contact details where available. Oakland County packages also include U.S. Census County Business Patterns data with establishment counts, employment and payroll by industry sector.
Top Business Categories in Oakland County, MI
| Category | Businesses | Share |
|---|---|---|
| Real Estate Agents | 1,358 | 2.4% |
| Beauty Salons | 792 | 1.4% |
| Insurance Agencies | 785 | 1.4% |
| Churches & Religious Organizations | 770 | 1.4% |
| Medical Offices | 727 | 1.3% |
| Professional Services | 722 | 1.3% |
| Contractors | 675 | 1.2% |
| Hair Salons | 664 | 1.2% |
| Dental Offices | 631 | 1.1% |
| Gyms & Fitness | 599 | 1.1% |
Oakland County Business Listings
| Business | Category | City |
|---|---|---|
| KV Sports | 3D Printing Service | South Lyon |
| Northland Family Planning Centers | Abortion Clinic | Southfield |
| Meridian Health Services | Abuse And Addiction Treatment | Waterford |
| LTU | Bookstore | Academic Bookstore | Southfield |
| Clean Juice | Acai Bowls | Troy |
| Timberidge | Accommodation | Farmington Hills |
| Beals, Caruana & McVety | Accountant | Troy |
| Memtech Acoustics | Acoustical Consultant | Rochester Hills |
| 5 Star Sports & Training Center | Active Life | Troy |
| Michigan Associates of Acupuncture and Integrative Medicine | Acupuncture | West Bloomfield |
| Download Oakland County business listings | ||
Oakland County business listings sourced from Overture Maps. Includes locations with a high level of confidence.
Oakland County Basemaps
Oakland 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 Oakland County Data Package
This page shows a preview of what's included in the Oakland 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 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 Oakland County. These nearby pages include the same mix of county maps, demographic summaries, school district context, housing trends and package links.