Assumption County GIS Maps
Assumption County, Louisiana, has 21,039 residents and covers 338.6 square miles. The population declined 10.2% between the 2010 and 2020 census. More residents left than arrived over that decade. The FIPS code for Assumption County is 22007.
Napoleonville is the county's largest population center. Assumption County also includes 6 zip codes, 1 public school district and 17 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.
Assumption County Trends
- Population
- 21,039▾
- Median Home Value
- $141,200▴
- K-12 Enrollment
- 2,701▾
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.
Assumption 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.
Assumption County Population
Assumption County had 21,039 residents in 2020. That was 10.2% lower than in 2010. Assumption County had 2,349 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 62 people per square mile. Some of the county's most populated postal areas include Napoleonville, Pierre Part and Belle Rose.
Population Trend in Assumption County LA
Assumption County Population per 2000, 2010 and 2020 census counts with a baseline 2030 projection.
Assumption County Zip Codes
Assumption County has 6 zip codes. Some of the county's most populated zip codes include Napoleonville (70390), Pierre Part (70339) and Belle Rose (70341). Napoleonville is the largest zip by population, with about 6,593 residents or 31% of the county total. Together, the three largest zips account for about 72% of all county residents based on 2020 population estimates.
Most Populated Zip Codes in Assumption County LA
| ZIP | Area | Population | Trend |
|---|---|---|---|
| 70390 | Napoleonville | 6,593 | ▾ -5.4% |
| 70339 | Pierre Part | 5,332 | ▾ -11.6% |
| 70341 | Belle Rose | 3,239 | ▾ -27.2% |
| 70372 | Labadieville | 2,323 | ▾ -7.7% |
| 70393 | Plattenville | 421 | ▾ -45.6% |
| Download all zip code data | |||
Assumption County Zip Code populations and trends per most recent census data.
Assumption County Demographics
Assumption County has a median age of 42, which makes the county a little older than Louisiana overall. About 20.8% of residents are under 18, while 20.1% 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 29.6% of the population, which points to a solid working-age base. About 13.7% of adults have a bachelor's degree or higher, above the statewide figure of 26.6%. 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 Assumption County LA
Median Age
42
Under 18
20.8%
Age 65+
20.1%
Bachelor's+
13.7%
Assumption County School Districts
Assumption County is served by 1 public school district with 2,701 students enrolled in 2024. Several larger districts account for a substantial share of students across the county map area. 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 Assumption County LA
| District | Enrollment | Share | Trend |
|---|---|---|---|
| Assumption Parish School District | 2,701 | 100% | ▾ -8.2% |
| Download all school district data | |||
Assumption County school district enrollment and trends per most recent NCES reporting data.
Assumption County Housing & Real Estate
Assumption County has a median home value of $141,200 and a median gross rent of $801. About 86% of occupied homes in the county are owner-occupied, so the local housing market leans heavily toward ownership. Home values run below the Louisiana median, while rents come in below the state average. In March 2026, the median listing price was $247,500 and homes spent about 115 days on the market.
Assumption County Housing Mix
Assumption County housing mix: owner, renter and vacant units.
Assumption County Housing Trends
Assumption County median home value and rent trend (last 5 years).
Businesses in Assumption County, LA
Assumption County has 470 business listings across 186 categories. The largest categories in Assumption County business listings are Churches & Religious Organizations (24, 5.1%), Baptist Church (15, 3.2%), and Gas Stations (14, 3.0%). The full Assumption County business listings dataset includes names, categories, addresses and contact details where available. Assumption County packages also include U.S. Census County Business Patterns data with establishment counts, employment and payroll by industry sector.
Top Business Categories in Assumption County, LA
| Category | Businesses | Share |
|---|---|---|
| Churches & Religious Organizations | 24 | 5.1% |
| Baptist Church | 15 | 3.2% |
| Gas Stations | 14 | 3.0% |
| Convenience Stores | 12 | 2.6% |
| Auto Repair | 11 | 2.3% |
| Discount Store | 10 | 2.1% |
| Catholic Church | 9 | 1.9% |
| Contractors | 9 | 1.9% |
| Post Offices | 8 | 1.7% |
| Banks & Credit Unions | 8 | 1.7% |
Assumption County Business Listings
| Business | Category | City |
|---|---|---|
| Rick's Fitness Gym | Active Life | Paincourtville |
| B & D Feeds | Agricultural Cooperatives | Napoleonville |
| Assumption Parish Agricultural Building | Agricultural Service | Napoleonville |
| Politz's Restaurant | American Restaurants | Napoleonville |
| Adam's Cypress Swamp Driftwood Family Museum | Art Museum | Pierre Part |
| China City Restaurant | Asian Restaurant | Pierre Part |
| Capital One ATM | ATMs | Pierre Part |
| Trent's Window Tinting | Automotive | Labadieville |
| Barbera Chevrolet Service | Automotive Dealer | Napoleonville |
| S. A. S Auto Parts | Automotive Parts And Accessories | Belle Rose |
| Download Assumption County business listings | ||
Assumption County business listings sourced from Overture Maps. Includes locations with a high level of confidence.
Assumption County Basemaps
Assumption 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 Assumption County Data Package
This page shows a preview of what's included in the Assumption 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.
One-time · instant download · 30-day refund guarantee · See full package details
Preview a Live Package Demo
See exactly what is included in a county data package. Inspect how files are organized, the interactive data explorer and how maps and analytics are laid out. The demo loads a real sample package from Louisiana — explore the full structure before you buy.
No email or download required. Opens in a preview window on this page.
Nearby Counties
Browse county data pages for the counties that border Assumption County. These nearby pages include the same mix of county maps, demographic summaries, school district context, housing trends and package links.