Lamar County GIS Maps
Lamar County, Georgia, has 18,500 residents across 10,025 parcels and covers 183.5 square miles. The population grew 1% between the 2010 and 2020 census. More residents moved in than left over that decade. The FIPS code for Lamar County is 13171.
Barnesville is the county's largest population center. Lamar County also includes 2 zip codes, 1 public school district and 10 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.
Lamar County Trends
- Population
- 18,500▴
- Median Home Value
- $201,400▴
- K-12 Enrollment
- 2,872▾
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.
Lamar 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.
Lamar County Parcels
Lamar County has 10,025 mapped parcels covering 114,393 acres. The median assessed value is $211,072. The median lot size is 2.03 acres. 1,994 parcels are 10 acres or larger. The records carry 8,517 distinct owner names. Owner names, site addresses and assessed values are on nearly every parcel. Lot sizes reach 95.9%. Browse the interactive Lamar County Parcel viewer here.
Lamar County Parcel Data Coverage
| Field | Parcels | Coverage |
|---|---|---|
| Parcel ID | 10,025 | 100% |
| Owner name | 9,865 | 98.4% |
| Owner mailing address | 0 | 0% |
| Site address | 9,863 | 98.4% |
| Land use code | 0 | 0% |
| Land use description | 0 | 0% |
| Assessed value | 9,868 | 98.4% |
| Land value | 0 | 0% |
| Improvement value | 0 | 0% |
| Acreage | 9,611 | 95.9% |
| Parcel boundary | 10,025 | 100% |
| Download all Lamar County parcels. | ||
Field coverage measured across all Lamar County parcel records.
Lamar County Population
Lamar County had 18,500 residents in 2020. That was 1% higher than in 2010. Lamar County added 2,588 people between 2000 and 2020, which points to steady long-term growth. The county is fairly spread out, with about 101 people per square mile. Two of the county's most populated postal areas are Barnesville and Milner.
Population Trend in Lamar County GA
Lamar County Population per 2000, 2010 and 2020 census counts with a baseline 2030 projection.
Lamar County Zip Codes
Lamar County has 2 zip codes. Two of the county's most populated zip codes are Barnesville (30204) and Milner (30257). Barnesville is the largest zip by population, with about 12,816 residents or 69% of the county total. Together, the three largest zips account for about 94% of all county residents based on 2020 population estimates.
Most Populated Zip Codes in Lamar County GA
| ZIP | Area | Population | Trend |
|---|---|---|---|
| 30204 | Barnesville | 12,816 | ▾ -5% |
| 30257 | Milner | 4,608 | ▴ 11.4% |
| Download all zip code data | |||
Lamar County Zip Code populations and trends per most recent census data.
Lamar County Demographics
Lamar County has a median age of 38.7, which makes the county a little older than Georgia overall. About 21.6% of residents are under 18, while 17% 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 31% of the population, which points to a solid working-age base. About 19.5% of adults have a bachelor's degree or higher, above the statewide figure of 34.2%. 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 Lamar County GA
Median Age
38.7
Under 18
21.6%
Age 65+
17%
Bachelor's+
19.5%
Lamar County School Districts
Lamar County is served by 1 public school district with 2,872 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 grown modestly since 2017 across the districts shown on the county map.
Largest School Districts by Enrollment in Lamar County GA
| District | Enrollment | Share | Trend |
|---|---|---|---|
| Lamar County School District | 2,872 | 100% | ▾ -0.9% |
| Download all school district data | |||
Lamar County school district enrollment and trends per most recent NCES reporting data.
Lamar County Housing & Real Estate
Lamar County has a median home value of $201,400 and a median gross rent of $913. About 76% of occupied homes in the county are owner-occupied, so the local housing market leans heavily toward ownership. Home values run below the Georgia median, while rents come in below the state average. In March 2026, the median listing price was $350,000 and homes spent about 54 days on the market.
Lamar County Housing Mix
Lamar County housing mix: owner, renter and vacant units.
Lamar County Housing Trends
Lamar County median home value and rent trend (last 5 years).
Businesses in Lamar County, GA
Lamar County has 630 business listings across 269 categories. The largest categories in Lamar County business listings are Churches & Religious Organizations (33, 5.2%), Baptist Church (17, 2.7%), and Religious Organization (12, 1.9%). The full Lamar County business listings dataset includes names, categories, addresses and contact details where available. Lamar County packages also include U.S. Census County Business Patterns data with establishment counts, employment and payroll by industry sector.
Top Business Categories in Lamar County, GA
| Category | Businesses | Share |
|---|---|---|
| Churches & Religious Organizations | 33 | 5.2% |
| Baptist Church | 17 | 2.7% |
| Religious Organization | 12 | 1.9% |
| Farm | 10 | 1.6% |
| Auto Repair | 10 | 1.6% |
| Public And Government Association | 9 | 1.4% |
| Restaurants | 9 | 1.4% |
| Convenience Stores | 8 | 1.3% |
| Hair Salons | 8 | 1.3% |
| Discount Store | 7 | 1.1% |
Lamar County Business Listings
| Business | Category | City |
|---|---|---|
| Mac's Accounting and Tax Service | Accountant | Barnesville |
| Gordon Trail | Active Life | Barnesville |
| Promo Vision Advertising | Advertising Agency | Milner |
| Farm Supply Warehouse | Agricultural Service | Barnesville |
| Welch Boer Goats | Agriculture | Barnesville |
| Liberty Hill Airport | Airport | Milner |
| J & J Remodeling | Altering And Remodeling Contractor | Barnesville |
| Milner Place Downtown Eatery | American Restaurants | Milner |
| Sugar Run Stables | Amusement Park | Barnesville |
| Wyatt Childs Inc | Antique Store | Barnesville |
| Download Lamar County business listings | ||
Lamar County business listings sourced from Overture Maps. Includes locations with a high level of confidence.
Lamar County Basemaps
Lamar 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 Lamar County Data Package
This page shows a preview of what's included in the Lamar 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 Lamar County. These nearby pages include the same mix of county maps, demographic summaries, school district context, housing trends and package links.