Texas · FIPS 48057 · County seat: Port Lavaca
Calhoun County, TX GIS & Parcel Viewer
Looking for lot lines or a parcel number in Calhoun County, TX? The quickest route is the Calhoun County appraisal district map, the county parcel map we keep on file for this county. We link straight to it and add a few tips for getting around.
Open the Calhoun County parcel map ↗
Opens gis.bisclient.com in a new tab. We link out and never embed or copy parcel data.
Calhoun County at a glance
| Official map | Calhoun County appraisal district map |
|---|---|
| Type | Appraisal district map (county level) |
| Website | gis.bisclient.com |
| Access | Free, no login (checked Oct 2026) |
| County seat | Port Lavaca |
| Population | 19,696 (2023 Census Bureau estimate) |
| Land area | 507 sq mi |
| FIPS code | 48057 |
About the official source
The source here is the Calhoun County appraisal district. Texas law gives these districts the job of valuing property for every local taxing unit in the county. Our October 2026 check found the map open to the public, with no account or payment needed.
Searching for a parcel, step by step
- Press the button above to open the appraisal district's map. Texas appraisal districts set taxable values, so their maps tie each parcel to a property account.
- Look up a property by its owner, situs address or property ID.
- Click any lot to see the account number and basic details.
- Follow the record link, when there is one, for values and exemptions.
Have a tax bill handy? The parcel or account number on it is usually the fastest way to search.
The county in brief
Calhoun County had an estimated 19,696 residents in 2023, according to the Census Bureau. With about 507 square miles of land, that works out to roughly 39 people per square mile. By population it ranks 125th of 254 counties in Texas. Another 526 square miles of water fall within its lines, according to Census mapping. The county seat is Port Lavaca.
Neighboring counties
Parcels close to the edge of Calhoun County can fall in the next county over. Neighboring counties:
Maps vs. surveys
Online parcel lines are drawn for tax and planning use. They can be off by several feet, so use a recorded plat or a licensed surveyor for fences, setbacks or a sale.