Land Records LogoLand Records
Contact Us

Williamson County, TX Parcels & GIS Data

Williamson County, TX parcel data: 290,715 property records with owner names, assessed values, land use, acreage, and addresses. Preview and download.

Land Records publishes Williamson County, Texas parcel data covering 290,715 property records.

This page documents parcel-level coverage for Williamson County, Texas. Each parcel record carries its boundary polygon (GIS geometry) along with attributes such as the parcel ID/APN, owner name and mailing address, situs (property) address, assessed land and improvement values, acreage, land-use and zoning codes, year built, and most recent sale price and date. Exact fill rates for Williamson County are listed in the attribute-coverage table below. Preview the data in the interactive explorer, or download the complete Williamson County property dataset.

Williamson County is a county in the U.S. state of Texas. As of the 2020 census, its population was 609,017. The 2025 population estimate was 752,827.

FIPS 48491

Official county website: https://gis.wilco.org/maps/?viewer=countymap

The FIPS code for Williamson County is 48491.

ExploreBuyDownload Williamson County data
BurnetTravisBastropLeeMilamBellWilliamson
Hosted Web API$200/mo

Attribute coverage

Williamson County contains 290,715 parcels in the current dataset. Column coverage is the percentage of those parcels for which the attribute is populated (non-NULL). For the LBCS columns, only real classifications count: the to-be-determined and not-applicable placeholder codes are excluded.

ColumnCoverageRecords populated
lrid100%290,715
parcelid100%290,715
parcelid2100%290,715
ogparcelid100%290,715
ogparcelid2100%290,715
parentid<0.1%0
stackid<0.1%0
geoid100%290,715
statefp100%290,715
countyfp100%290,715
countyname100%290,715
cousubfp100%290,715
cousubname100%290,715
tractce100%290,715
tractname100%290,715
taxacctnum100%290,714
taxyear<0.1%0
taxdistrict100%290,715
usecode98.4%286,083
usedesc98.4%286,083
zoningcode32.2%93,679
zoningdesc63.3%184,117
numbldgs<0.1%69
numunits<0.1%0
yearbuilt<0.1%0
numfloors<0.1%0
bldgsqft<0.1%0
bedrooms<0.1%0
halfbaths<0.1%0
fullbaths<0.1%0
imprvalue<0.1%0
landvalue<0.1%0
agvalue<0.1%0
totalvalue<0.1%0
taxacres34.7%100,860
calcarea100%290,715
saleamt<0.1%0
saledate<0.1%0
ownertype100%290,707
ownername100%290,707
owneraddr99.9%290,512
ownercity100%290,696
ownerstate100%290,696
ownerzip100%290,696
parceladdr100%290,715
parcelcity97.6%283,660
parcelstate100%290,715
parcelzip100%290,715
legaldesc100%290,658
township<0.1%0
section<0.1%0
qtrsection<0.1%0
range<0.1%0
plssdesc<0.1%0
book<0.1%0
page<0.1%0
block<0.1%7
lot84.9%246,856
parceltype0.2%622
accesstype0.7%1,908
iucnclass0.1%216
placename3.5%10,160
placetype3.4%10,021
firmid100%290,611
firmdate100%290,611
fldzone100%290,611
zonesubty98.8%287,119
staticbfe<0.1%120
elevmin77.6%225,692
elevmax77.6%225,692
elevavg77.6%225,692
fireplaces<0.1%0
heating<0.1%0
heatfuel<0.1%0
cooling<0.1%0
foundation<0.1%0
roofcover<0.1%0
siding<0.1%0
bldgtype<0.1%0
naicscode9.7%28,227
frsid<0.1%0
dfrurl<0.1%0
caapermit<0.1%0
cwapermit<0.1%0
rcrapermit<0.1%0
updated100%290,715
centroidx100%290,715
centroidy100%290,715
surfpointx100%290,715
surfpointy100%290,715
geom100%290,715
extras100%290,715
ownerlist75.1%218,415
placefp67.6%196,497
zoningurl32.2%93,548
lbcsactivity86.9%252,579
lbcsfunction86.0%250,065
lbcstype86.9%252,605
lbcscharacter86.9%252,530
lbcsownership100%290,707
sourceurl98.4%286,084

Schema mapping

How source columns from the acquired Williamson County GIS layers map into the harmonized entity schemas and assemble into the published parcel table, alongside supplemented fields (elevation, flood zone) and deterministic columns.

Schema mapping — Williamson County, Texas (48491) 3 entities · most recent acquisition per entity · generated 2026-10-10 direct column transformed (expression) geometry extras json supplemented determined ALL ENTITIES → FINAL PARCEL SCHEMA Harmonized entity columns assemble into publish.parcel_layer — matched by column name. Supplemented fields show their fill rate in this county. SOURCE COLUMNS HARMONIZED ENTITIES PUBLISH.PARCEL_LAYER ADDRESS address address_fraction prefix_direction prefix_type street_name street_type suffix_direction address_suffix geom address_type parent_place_id place_id segment_id full_street_name created_by created_date modified_by modified_date house_number road unit geom extras PARCEL wcadr globalid wcadid acres owner mailadd mailcity mailst mailzip siteadd legal last_edited_date geom juris subdiv created_user created_date last_edited_user parcelid parcelid2 taxacctnum taxacres ownername owneraddr ownercity ownerstate ownerzip parceladdr legaldesc updated geom taxdistrict extras ZONING zoning zoning_lab ordinance geom pin fullname map_id date_added acres model_node annexation zoningcode zoningdesc ordinance geom extras determined · ground truth 100% lrid 100% geoid 100% statefp 100% countyfp 100% countyname 100% cousubfp 100% cousubname 100% tractce 100% tractname geom · derived from geometry geom dem.us_1m · USGS 1m DEM 77.6% elevmin 77.6% elevmax 77.6% elevavg s_fld_haz_ar · FEMA NFHL 100% fldzone 98.8% zonesubty 0.0% staticbfe 100% firmdate 100% firmid supplemented · derived / other pipelines 98.4% usecode 98.4% usedesc 97.6% parcelcity 100% parcelstate 100% parcelzip 84.9% lot 75.1% ownerlist 67.6% placefp 86.9% lbcsactivity 86.0% lbcsfunction 86.9% lbcstype 86.9% lbcscharacter 100% lbcsownership 98.4% sourceurl lrid parcelid parcelid2 ogparcelid ogparcelid2 geoid statefp countyfp countyname cousubfp cousubname tractce tractname taxacctnum taxdistrict usecode usedesc zoningcode zoningdesc taxacres calcarea ownertype ownername owneraddr ownercity ownerstate ownerzip parceladdr parcelcity parcelstate parcelzip legaldesc lot firmid firmdate fldzone zonesubty staticbfe elevmin elevmax elevavg updated centroidx centroidy surfpointx surfpointy geom extras ownerlist placefp lbcsactivity lbcsfunction lbcstype lbcscharacter lbcsownership sourceurl publish.parcel_layer columns not fed by these sources (45) — empty or below 50% fill in this county parentid, stackid, taxyear, numbldgs, numunits, yearbuilt, numfloors, bldgsqft, bedrooms, halfbaths, fullbaths, imprvalue, landvalue, agvalue totalvalue, saleamt, saledate, township, section, qtrsection, range, plssdesc, book, page, block, parceltype, accesstype, iucnclass, placename placetype, fireplaces, heating, heatfuel, cooling, foundation, roofcover, siding, bldgtype, naicscode, frsid, dfrurl, caapermit, cwapermit rcrapermit, zoningurl ADDRESS 5 mapped · 4 transformed · 17 unmapped (NULL) SOURCE COLUMNS HARMONIZED → ADDRESS address address_fraction prefix_direction prefix_type street_name street_type suffix_direction address_suffix geom address_type parent_place_id place_id segment_id full_street_name created_by created_date modified_by modified_date house_number nullif(concat_ws(' ', address::text, nullif(trim(address_fracti… road nullif(concat_ws(' ', nullif(trim(prefix_direction::text), ''),… unit nullif(trim(address_suffix::text), '')::text geom extras json_build_object( 'address_type', address_type::text, 'parent_… not present in source — filled with NULL (17) house, category, near, level, staircase, entrance, po_box, postcode, suburb, city_district, city, island, state_district, state, country_region country, world_region PARCEL 15 mapped · 2 transformed · 40 unmapped (NULL) SOURCE COLUMNS HARMONIZED → PARCEL wcadr globalid wcadid acres owner mailadd mailcity mailst mailzip siteadd legal last_edited_date geom juris subdiv created_user created_date last_edited_user parcelid parcelid2 taxacctnum taxacres ownername owneraddr ownercity ownerstate ownerzip parceladdr legaldesc updated to_timestamp(last_edited_date::double precision / 1000.0)::text… geom taxdistrict extras json_build_object( 'subdiv', subdiv::text, 'created_user', crea… not present in source — filled with NULL (40) taxyear, usecode, usedesc, zoningcode, zoningdesc, numbldgs, numunits, yearbuilt, numfloors, bldgsqft, bedrooms, halfbaths, fullbaths imprvalue, landvalue, agvalue, totalvalue, saleamt, saledate, parcelcity, parcelstate, parcelzip, township, section, qtrsection, range plssdesc, book, page, block, lot, sourceurl, parentid, heatfuel, fireplaces, heating, cooling, foundation, roofcover, siding ZONING 5 mapped · 4 transformed · 5 unmapped (NULL) SOURCE COLUMNS HARMONIZED → ZONING zoning zoning_lab ordinance geom pin fullname map_id date_added acres model_node annexation zoningcode NULLIF(TRIM(zoning), '')::text zoningdesc NULLIF(TRIM(zoning_lab), '')::text ordinance NULLIF(TRIM(ordinance), '')::text geom extras json_build_object( 'pin', NULLIF(TRIM(pin), '')::text, 'fullnam… not present in source — filled with NULL (5) zoningtype, setbacks, restrictions, notes, sourceurl

Neighboring counties

Parcel data for counties bordering Williamson County:

Frequently asked questions

Where can I find Williamson County, TX parcel and GIS data?

Land Records publishes a Williamson County, TX parcel dataset in which every parcel carries its boundary polygon (GIS geometry) along with ownership, assessed value, land use, acreage, and sale history. Preview it in the interactive explorer on this page, or download the full Williamson County, TX dataset as a GeoPackage or CSV.

How many parcels are in Williamson County, TX?

The current dataset contains 290,715 parcel records for Williamson County, TX, each with its boundary geometry and assessor attributes.

What is the FIPS code for Williamson County, TX?

The FIPS code for Williamson County, TX is 48491.

What information does each Williamson County, TX parcel record include?

Each Williamson County, TX parcel record includes the parcel ID/APN, owner name and mailing address, situs (property) address, assessed land and improvement values, acreage, land-use and zoning codes, year built, and the most recent sale price and date — plus the parcel boundary polygon. Per-attribute fill rates are listed in the coverage table on this page.

Is Williamson County, TX parcel data free?

You can preview Williamson County, TX parcels for free in the interactive explorer. The complete dataset is available as a one-time download or through the nationwide parcel web service; see the download options on this page for current pricing.

Does Williamson County, TX have an official GIS or property records website?

Yes — the official Williamson County, TX government website is linked in the county details above. Land Records standardizes Williamson County, TX assessor and recorder records into a single nationwide parcel schema with GIS boundary geometry.

On this page

Attribute coverageSchema mappingNeighboring countiesFAQRelated