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Montgomery County, MD Parcels & GIS Data

Montgomery County, MD parcel data: 288,171 property records with owner names, assessed values, land use, acreage, and addresses. Preview and download.

Land Records publishes Montgomery County, Maryland parcel data covering 288,171 property records.

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

Montgomery County is the most populous county in the U.S. state of Maryland. As of the 2020 United States census, the county's population was 1,062,061, increasing by 9.3% from 2010. The county seat is Rockville, while its most populous place is Germantown.

FIPS 24031

Official county website: https://www.montgomerycountymd.gov/

The FIPS code for Montgomery County is 24031.

Explore Montgomery County data
HowardFrederickLoudounFairfaxArlingtonDistrict of ColumbiaPrince George'sMontgomery
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Attribute coverage

Montgomery County contains 288,171 parcels in the current dataset. Column coverage is the percentage of those parcels for which the attribute is populated (non-NULL).

ColumnCoverageRecords populated
lrid100%288,171
parcelid6.5%18,756
parcelid26.5%18,701
ogparcelid6.5%18,758
ogparcelid26.5%18,684
parentid16.7%48,205
stackid<0.1%0
geoid100%288,171
statefp100%288,171
countyfp100%288,171
countyname100%288,171
cousubfp100%288,171
cousubname100%288,171
tractce100%288,171
tractname100%288,171
taxacctnum100%288,124
taxyear97.6%281,303
taxdistrict97.6%281,368
usecode97.9%282,028
usedesc97.8%281,926
zoningcode97.6%281,368
zoningdesc97.6%281,263
numbldgs100%288,119
numunits97.6%281,148
yearbuilt97.8%281,940
numfloors97.7%281,416
bldgsqft97.6%281,302
bedrooms<0.1%0
halfbaths<0.1%0
fullbaths<0.1%0
imprvalue88.8%255,907
landvalue94.1%271,089
agvalue0.7%1,916
totalvalue<0.1%0
taxacres97.8%281,960
calcarea100%288,171
saleamt62.8%180,936
saledate75.2%216,748
ownertype97.6%281,339
ownername97.6%281,339
owneraddr97.6%281,354
ownercity97.6%281,373
ownerstate97.6%281,261
ownerzip97.6%281,282
parceladdr100%288,094
parcelcity99.8%287,704
parcelstate100%288,171
parcelzip100%288,171
legaldesc97.8%281,952
township<0.1%0
section<0.1%0
qtrsection<0.1%0
range<0.1%0
plssdesc<0.1%0
book96.1%277,043
page96.1%277,040
block81.2%234,133
lot87.4%251,776
parceltype2.2%6,411
accesstype2.2%6,411
iucnclass1.1%3,280
placename5.4%15,466
placetype5.3%15,291
firmid100%288,167
firmdate100%288,167
fldzone100%288,167
zonesubty99.5%286,666
staticbfe<0.1%1
elevmin2.2%6,380
elevmax2.2%6,380
elevavg2.2%6,380
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
naicscode8.0%22,931
frsid<0.1%0
dfrurl<0.1%0
caapermit<0.1%0
cwapermit<0.1%0
rcrapermit<0.1%0
updated100%288,140
centroidx100%288,171
centroidy100%288,171
surfpointx100%288,171
surfpointy100%288,171
geom100%288,171
extras100%288,119
lrversion100%288,171

Schema mapping

How source columns from the acquired Montgomery 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 — Montgomery County, Maryland (24031) 1 entity · most recent acquisition per entity · generated 2026-07-18 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 apn search_apn owner_firstname owner_lastname owner_st_number owner_st_dir owner_st_name owner_st_type owner_st_unit owner_city owner_state owner_zip site_st_number site_st_dir site_st_name site_st_type site_st_unit site_city site_state site_zip geom 7 cols ⇢ parcelid parcelid2 ownername owneraddr ownercity ownerstate ownerzip parceladdr parcelcity parcelstate parcelzip geom extras determined · ground truth 100% lrid 100% geoid 100% statefp 100% countyfp 100% countyname 100% cousubfp 100% cousubname 100% tractce 100% tractname 97.6% taxyear 100% updated 100% lrversion geom · derived from geometry geom dem.us_1m · USGS 1m DEM 2.2% elevmin 2.2% elevmax 2.2% elevavg s_fld_haz_ar · FEMA NFHL 100% fldzone 99.5% zonesubty 0.0% staticbfe 100% firmdate 100% firmid supplemented · derived / other pipelines 100% taxacctnum 97.6% taxdistrict 97.9% usecode 97.8% usedesc 97.6% zoningcode 97.6% zoningdesc 100% numbldgs 97.6% numunits 97.8% yearbuilt 97.7% numfloors 97.6% bldgsqft 88.8% imprvalue 94.1% landvalue 97.8% taxacres 62.8% saleamt 75.2% saledate 97.8% legaldesc 96.1% book 96.1% page 81.2% block 87.4% lot lrid parcelid parcelid2 ogparcelid ogparcelid2 geoid statefp countyfp countyname cousubfp cousubname tractce tractname taxacctnum taxyear taxdistrict usecode usedesc zoningcode zoningdesc numbldgs numunits yearbuilt numfloors bldgsqft imprvalue landvalue taxacres calcarea saleamt saledate ownertype ownername owneraddr ownercity ownerstate ownerzip parceladdr parcelcity parcelstate parcelzip legaldesc book page block lot firmid firmdate fldzone zonesubty staticbfe elevmin elevmax elevavg updated centroidx centroidy surfpointx surfpointy geom extras lrversion publish.parcel_layer columns not fed by these sources (31) — empty or below 50% fill in this county parentid, stackid, bedrooms, halfbaths, fullbaths, agvalue, totalvalue, township, section, qtrsection, range, plssdesc, parceltype, accesstype iucnclass, placename, placetype, fireplaces, heating, heatfuel, cooling, foundation, roofcover, siding, bldgtype, naicscode, frsid, dfrurl caapermit, cwapermit, rcrapermit PARCEL 12 mapped · 3 transformed · 7 kept in extras · 42 unmapped (NULL) SOURCE COLUMNS HARMONIZED → PARCEL apn search_apn owner_firstname owner_lastname owner_st_number owner_st_dir owner_st_name owner_st_type owner_st_unit owner_city owner_state owner_zip site_st_number site_st_dir site_st_name site_st_type site_st_unit site_city site_state site_zip geom parcelid parcelid2 ownername CAST(COALESCE(owner_firstname, '') || ' ' || COALESCE(owner_las… owneraddr CAST(COALESCE(owner_st_number, '') || ' ' || COALESCE(owner_st_… ownercity ownerstate ownerzip parceladdr CAST(COALESCE(site_st_number, '') || ' ' || COALESCE(site_st_di… parcelcity parcelstate parcelzip geom extras · 7 source columns preserved as json site_st_post_dir, clientid, shape_starea__, shape_stlength__ stagingid, oldglobalid, globalid extras not present in source — filled with NULL (42) taxacctnum, taxyear, usecode, usedesc, zoningcode, zoningdesc, numbldgs, numunits, yearbuilt, numfloors, bldgsqft, bedrooms, halfbaths fullbaths, imprvalue, landvalue, agvalue, totalvalue, taxacres, saleamt, saledate, legaldesc, township, section, qtrsection, range, plssdesc book, page, block, lot, updated, sourceurl, taxdistrict, parentid, fireplaces, heating, cooling, foundation, roofcover, siding, heatfuel

Neighboring counties

Parcel data for counties bordering Montgomery County:

Frequently asked questions

Where can I find Montgomery County, MD parcel and GIS data?

Land Records publishes a Montgomery County, MD 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 Montgomery County, MD dataset as a GeoPackage or CSV.

How many parcels are in Montgomery County, MD?

The current dataset contains 288,171 parcel records for Montgomery County, MD, each with its boundary geometry and assessor attributes.

What is the FIPS code for Montgomery County, MD?

The FIPS code for Montgomery County, MD is 24031.

What information does each Montgomery County, MD parcel record include?

Each Montgomery County, MD 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 Montgomery County, MD parcel data free?

You can preview Montgomery County, MD 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 Montgomery County, MD have an official GIS or property records website?

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

On this page

Attribute coverageSchema mappingNeighboring countiesFAQRelated