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Lewis and Clark County, MT Parcels & GIS Data

Lewis and Clark County, MT parcel data: 45,987 property records with owner names, assessed values, land use, acreage, and addresses. Preview and download.

Land Records publishes Lewis and Clark County, Montana parcel data covering 45,987 property records.

This page documents parcel-level coverage for Lewis and Clark County, Montana. 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 Lewis and Clark County are listed in the attribute-coverage table below. Preview the data in the interactive explorer, or download the complete Lewis and Clark County property dataset.

Lewis and Clark County is a county located in the U.S. state of Montana. As of the 2020 census, the population was 70,973, making it the 4th least populous capital county in the United States. Its county seat and most populous city is Helena, the state capital.

FIPS 30049

The FIPS code for Lewis and Clark County is 30049.

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Attribute coverage

Lewis and Clark County contains 45,987 parcels in the current dataset. Column coverage is the percentage of those parcels for which the attribute is populated (non-NULL).

ColumnCoverageRecords populated
lrid100%45,987
parcelid100%45,987
parcelid299.9%45,936
ogparcelid100%45,987
ogparcelid299.9%45,936
parentid<0.1%0
stackid<0.1%0
geoid100%45,987
statefp100%45,987
countyfp100%45,987
countyname100%45,987
cousubfp100%45,987
cousubname100%45,987
tractce100%45,987
tractname100%45,987
taxacctnum13.4%6,161
taxyear99.9%45,941
taxdistrict99.9%45,941
usecode99.8%45,906
usedesc99.9%45,941
zoningcode<0.1%0
zoningdesc<0.1%0
numbldgs100%45,987
numunits69.4%31,916
yearbuilt58.7%27,005
numfloors58.9%27,086
bldgsqft58.7%27,005
bedrooms58.3%26,791
halfbaths11.2%5,157
fullbaths57.8%26,588
imprvalue68.9%31,664
landvalue99.6%45,783
agvalue<0.1%0
totalvalue99.6%45,783
taxacres99.9%45,936
calcarea100%45,987
saleamt<0.1%0
saledate87.6%40,285
ownertype99.9%45,941
ownername99.9%45,941
owneraddr99.9%45,940
ownercity99.9%45,923
ownerstate99.9%45,923
ownerzip99.9%45,923
parceladdr99.9%45,944
parcelcity82.0%37,694
parcelstate100%45,987
parcelzip100%45,987
legaldesc99.9%45,941
township<0.1%0
section<0.1%0
qtrsection<0.1%0
range<0.1%0
plssdesc<0.1%0
book87.2%40,105
page87.2%40,105
block<0.1%0
lot<0.1%0
parceltype11.9%5,487
accesstype11.9%5,487
iucnclass9.5%4,346
placename15.7%7,198
placetype15.5%7,139
firmid100%45,984
firmdate100%45,984
fldzone100%45,984
zonesubty52.8%24,293
staticbfe<0.1%0
elevmin86.5%39,756
elevmax86.5%39,756
elevavg86.5%39,756
fireplaces9.5%4,371
heating58.7%27,005
heatfuel58.7%27,005
cooling58.7%27,005
foundation58.7%27,005
roofcover51.5%23,686
siding58.7%27,005
bldgtype<0.1%0
naicscode27.8%12,799
frsid<0.1%0
dfrurl<0.1%0
caapermit<0.1%0
cwapermit<0.1%0
rcrapermit<0.1%0
updated100%45,987
centroidx100%45,987
centroidy100%45,987
surfpointx100%45,987
surfpointy100%45,987
geom100%45,987
extras100%45,987
lrversion100%45,987

Schema mapping

How source columns from the acquired Lewis and Clark 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 — Lewis and Clark County, Montana (30049) 1 entity · most recent acquisition per entity · generated 2026-07-13 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 PARCEL parcelid propertyid assessmentcode taxyear proptype totalbuildingvalue totallandvalue totalvalue totalacres ownername owneraddress1 ownercity ownerstate ownerzipcode addressline1 legaldescriptionshort township section range geom levydistrict 19 cols ⇢ parcelid parcelid2 taxacctnum taxyear usedesc imprvalue landvalue totalvalue taxacres ownername owneraddr ownercity ownerstate ownerzip parceladdr legaldesc township section range geom taxdistrict extras determined · ground truth 100% lrid 100% geoid 100% statefp 100% countyfp 100% countyname 100% cousubfp 100% cousubname 100% tractce 100% tractname 100% updated 100% lrversion geom · derived from geometry geom dem.us_1m · USGS 1m DEM 86.5% elevmin 86.5% elevmax 86.5% elevavg s_fld_haz_ar · FEMA NFHL 100% fldzone 52.8% zonesubty 100% firmdate 100% firmid supplemented · derived / other pipelines 100% usecode 100% numbldgs 69.4% numunits 58.7% yearbuilt 58.9% numfloors 58.7% bldgsqft 58.3% bedrooms 57.8% fullbaths 87.6% saledate 82.0% parcelcity 100% parcelstate 100% parcelzip 87.2% book 87.2% page 58.7% heating 58.7% heatfuel 58.7% cooling 58.7% foundation 51.5% roofcover 58.7% siding lrid parcelid parcelid2 ogparcelid ogparcelid2 geoid statefp countyfp countyname cousubfp cousubname tractce tractname taxacctnum taxyear taxdistrict usecode usedesc numbldgs numunits yearbuilt numfloors bldgsqft bedrooms fullbaths imprvalue landvalue totalvalue taxacres calcarea saledate ownertype ownername owneraddr ownercity ownerstate ownerzip parceladdr parcelcity parcelstate parcelzip legaldesc township section range book page firmid firmdate fldzone zonesubty elevmin elevmax elevavg heating heatfuel cooling foundation roofcover siding updated centroidx centroidy surfpointx surfpointy geom extras lrversion publish.parcel_layer columns not fed by these sources (25) — empty or below 50% fill in this county parentid, stackid, zoningcode, zoningdesc, halfbaths, agvalue, saleamt, qtrsection, plssdesc, block, lot, parceltype, accesstype, iucnclass placename, placetype, staticbfe, fireplaces, bldgtype, naicscode, frsid, dfrurl, caapermit, cwapermit, rcrapermit PARCEL 21 mapped · 19 kept in extras · 33 unmapped (NULL) SOURCE COLUMNS HARMONIZED → PARCEL parcelid propertyid assessmentcode taxyear proptype totalbuildingvalue totallandvalue totalvalue totalacres ownername owneraddress1 ownercity ownerstate ownerzipcode addressline1 legaldescriptionshort township section range geom levydistrict parcelid parcelid2 taxacctnum taxyear usedesc imprvalue landvalue totalvalue taxacres ownername owneraddr ownercity ownerstate ownerzip parceladdr legaldesc township section range geom taxdistrict extras · 19 source columns preserved as json countycd, countyname, gisacres, subdivision certificateofsurvey, addressline2, citystatezip, propaccess continuouscropacres, fallowacres, farmsiteacres, forestacres grazingacres, wildhayacres, irrigatedacres, nonqualacres owneraddress2, owneraddress3, careoftaxpayer extras not present in source — filled with NULL (33) usecode, zoningcode, zoningdesc, numbldgs, numunits, yearbuilt, numfloors, bldgsqft, bedrooms, halfbaths, fullbaths, agvalue, saleamt, saledate parcelcity, parcelstate, parcelzip, qtrsection, plssdesc, book, page, block, lot, updated, sourceurl, parentid, fireplaces, heating, cooling foundation, roofcover, siding, heatfuel

Neighboring counties

Parcel data for counties bordering Lewis and Clark County:

On this page

Attribute coverageSchema mappingNeighboring countiesRelated