Calhoun County GIS Maps

Calhoun 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.

Calhoun County Parcels

Calhoun County has 22,645 mapped parcels covering 313,258 acres. The median assessed value is $84,140. The median lot size is 0.32 acres. 2,078 parcels are 10 acres or larger. The records carry 12,702 distinct owner names. About 6% of parcels list an owner mailing address outside Texas. Owner names, mailing addresses, site addresses, assessed values and lot sizes are on nearly every parcel. Browse the interactive Calhoun County Parcel viewer here.

Calhoun County Parcel Data Coverage

Field coverage measured across all Calhoun County parcel records. Download free sample data here.

Calhoun County Population

Calhoun County had 20,106 residents in 2020. That was 6% lower than in 2010. Calhoun County had 541 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 40 people per square mile. Some of the county's most populated postal areas include Port Lavaca, Seadrift and Port O Connor.

Population Trend in Calhoun County TX

Calhoun County Population per 2000, 2010 and 2020 census counts with a baseline 2030 projection.

Calhoun County Zip Codes

Calhoun County has 4 zip codes. Some of the county's most populated zip codes include Port Lavaca (77979), Seadrift (77983) and Port O Connor (77982). Port Lavaca is the largest zip by population, with about 16,782 residents or 83% of the county total. Together, the three largest zips account for about 97% of all county residents based on 2020 population estimates.

Most Populated Zip Codes in Calhoun County TX

Calhoun County Zip Code populations and trends per most recent census data.

Calhoun County Demographics

Calhoun County has a median age of 39.9, which makes the county a little older than Texas overall. About 23.4% of residents are under 18, while 18.6% 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 30.8% of the population, which points to a solid working-age base. About 16.9% of adults have a bachelor's degree or higher, above the statewide figure of 33.1%. The county has a more diverse population mix, with no single race or ethnicity accounting for all of the local story.

Key Demographics for Calhoun County TX

Calhoun County School Districts

Calhoun County is served by 1 public school district with 3,514 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 Calhoun County TX

Calhoun County school district enrollment and trends per most recent NCES reporting data.

Calhoun County Housing & Real Estate

Calhoun County has a median home value of $150,000 and a median gross rent of $1,121. 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 Texas median, while rents come in below the state average. In March 2026, the median listing price was $349,975 and homes spent about 127 days on the market.

Businesses in Calhoun County, TX

Calhoun County has 1,025 business listings across 310 categories. The largest categories in Calhoun County business listings are Rv Park (35, 3.4%), Churches & Religious Organizations (33, 3.2%), and Beach (21, 2.0%). The full Calhoun County business listings dataset includes names, categories, addresses and contact details where available. Calhoun County packages also include U.S. Census County Business Patterns data with establishment counts, employment and payroll by industry sector.

Top Business Categories in Calhoun County, TX

Calhoun County Business Listings

Calhoun County business listings sourced from Overture Maps. Includes locations with a high level of confidence.

Calhoun County Basemaps

Calhoun 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.

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 Texas — explore the full structure before you buy.