Texas · FIPS 48319 · County seat: Mason
Mason County, TX GIS & Parcel Viewer
Looking for lot lines or a parcel number in Mason County, TX? The quickest route is the Mason 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 Mason County parcel map ↗
Opens gis.bisclient.com in a new tab. We link out and never embed or copy parcel data.
Quick facts
| Official map | Mason County appraisal district map |
|---|---|
| Type | Appraisal district map (county level) |
| Website | gis.bisclient.com |
| Access | Free, no login (checked Oct 2026) |
| County seat | Mason |
| Population | 3,931 (2023 Census Bureau estimate) |
| Land area | 929 sq mi |
| FIPS code | 48319 |
Where the parcel data comes from
Texas splits the job: an appraisal district, not the county itself, values each property. This viewer belongs to the district covering Mason County. When we tested the link in October 2026 it opened with no login and no fee.
How to use the Mason County viewer
- 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
The U.S. Census Bureau estimated Mason County's population at 3,931 in 2023, spread over about 929 square miles of land, or roughly 4.2 people per square mile. Among Texas's 254 counties, it is the 208th largest by population. The county seat is Mason.
Nearby parcel maps
If the property sits near a county line, the parcel may belong to a neighbor. These counties border Mason County:
Before you rely on the lines
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.