Ionia County GIS Maps
Ionia County, Michigan, has 66,804 residents and covers 571.3 square miles. The population grew 4.5% between the 2010 and 2020 census. More residents moved in than left over that decade. The FIPS code for Ionia County is 26067.
Ionia is the county's largest population center. Ionia County also includes 12 zip codes, 9 public school districts and 35 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.
Ionia County Trends
- Population
- 66,804▴
- Median Home Value
- $189,400▴
- K-12 Enrollment
- 18,975▴
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.
Ionia 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.
Ionia County Population
Ionia County had 66,804 residents in 2020. That was 4.5% higher than in 2010. Ionia County added 5,286 people between 2000 and 2020, which points to steady long-term growth. The county is fairly spread out, with about 117 people per square mile. Some of the county's most populated postal areas include Ionia, Belding and Portland.
Population Trend in Ionia County MI
Ionia County Population per 2000, 2010 and 2020 census counts with a baseline 2030 projection.
Ionia County Zip Codes
Ionia County has 12 zip codes. Some of the county's most populated zip codes include Ionia (48846), Belding (48809) and Portland (48875). Ionia is the largest zip by population, with about 22,470 residents or 34% of the county total. Together, the three largest zips account for about 66% of all county residents based on 2020 population estimates.
Most Populated Zip Codes in Ionia County MI
| ZIP | Area | Population | Trend |
|---|---|---|---|
| 48846 | Ionia | 22,470 | ▴ 10.9% |
| 48809 | Belding | 11,245 | ▴ 2.1% |
| 48875 | Portland | 10,582 | ▴ 3.9% |
| 48849 | Lake Odessa | 5,904 | ▴ 3.3% |
| 48881 | Saranac | 5,438 | ▾ -1.1% |
| Download all zip code data | |||
Ionia County Zip Code populations and trends per most recent census data.
Ionia County Demographics
Ionia County has a median age of 38.8, which makes the county a little younger than Michigan overall. About 21.2% of residents are under 18, while 15.4% 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 34.9% of the population, which points to a solid working-age base. About 18% of adults have a bachelor's degree or higher, above the statewide figure of 31.8%. The county is mostly White by population, though Hispanic, Asian, Black and multiracial residents are also part of the local mix.
Key Demographics for Ionia County MI
Median Age
38.8
Under 18
21.2%
Age 65+
15.4%
Bachelor's+
18%
Ionia County School Districts
Ionia County is served by 9 public school districts with 18,975 students enrolled in 2024. The largest districts on the county map are Grand Ledge Public Schools, Lowell Area Schools and Ionia Public Schools. Those three districts account for about 61% 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 Ionia County MI
| District | Enrollment | Share | Trend |
|---|---|---|---|
| Grand Ledge Public Schools | 5,406 | 28.5% | ▴ 2.3% |
| Lowell Area Schools | 3,455 | 18.2% | ▴ 1.2% |
| Ionia Public Schools | 2,659 | 14% | ▾ -2.1% |
| Portland Public School District | 1,979 | 10.4% | ▾ -0.9% |
| Belding Area School District | 1,637 | 8.6% | ▴ 2% |
| Download all school district data | |||
Ionia County school district enrollment and trends per most recent NCES reporting data.
Ionia County Housing & Real Estate
Ionia County has a median home value of $189,400 and a median gross rent of $840. About 77% of occupied homes in the county are owner-occupied, so the local housing market leans heavily toward ownership. Home values run below the Michigan median, while rents come in below the state average. In March 2026, the median listing price was $309,900 and homes spent about 73 days on the market.
Ionia County Housing Mix
Ionia County housing mix: owner, renter and vacant units.
Ionia County Housing Trends
Ionia County median home value and rent trend (last 5 years).
Businesses in Ionia County, MI
Ionia County has 2,082 business listings across 437 categories. The largest categories in Ionia County business listings are Churches & Religious Organizations (81, 3.9%), Auto Repair (51, 2.4%), and Farm (46, 2.2%). The full Ionia County business listings dataset includes names, categories, addresses and contact details where available. Ionia County packages also include U.S. Census County Business Patterns data with establishment counts, employment and payroll by industry sector.
Top Business Categories in Ionia County, MI
| Category | Businesses | Share |
|---|---|---|
| Churches & Religious Organizations | 81 | 3.9% |
| Auto Repair | 51 | 2.4% |
| Farm | 46 | 2.2% |
| Parks & Recreation | 40 | 1.9% |
| Gas Stations | 38 | 1.8% |
| Contractors | 32 | 1.5% |
| Medical Offices | 32 | 1.5% |
| Elementary School | 27 | 1.3% |
| Insurance Agencies | 23 | 1.1% |
| Real Estate Agents | 22 | 1.1% |
Ionia County Business Listings
| Business | Category | City |
|---|---|---|
| Bear Creek Villa | Accommodation | Clarksville |
| Mark Jennings CPA | Accountant | Ionia |
| All Fix Fitness | Active Life | Saranac |
| Shirley's Backroom | Adult Entertainment | Berlin Twp |
| Outdoor Cover Warehouse | Adventure Sports Center | Belding |
| Brook Windy Companies Inc | Advertising Agency | Portland |
| Barry County Farm Bureau | Agricultural Cooperatives | Ionia |
| Farm Depot | Agricultural Service | Ionia |
| Weaver Acres | Agriculture | Keene Township |
| Benz Aviation | Airline | Fremont |
| Download Ionia County business listings | ||
Ionia County business listings sourced from Overture Maps. Includes locations with a high level of confidence.
Ionia County Basemaps
Ionia 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 Ionia County Data Package
This page shows a preview of what's included in the Ionia 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 Ionia County. These nearby pages include the same mix of county maps, demographic summaries, school district context, housing trends and package links.