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Montgomery County, MD Parcels & GIS Data

Montgomery County, MD parcel data: 288,099 property records with owner names, assessed values, land use, acreage, and addresses. Preview and download.

Land Records publishes Montgomery County, Maryland parcel data covering 288,099 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.

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Attribute coverage

Montgomery County contains 288,099 parcels in the current dataset. Column coverage is the percentage of those parcels for which the attribute is populated (non-NULL).

ColumnCoverageRecords populated
lrid100%288,099
parcelid6.5%18,698
parcelid26.5%18,692
ogparcelid6.5%18,700
ogparcelid26.5%18,694
parentid16.7%48,205
stackid<0.1%0
geoid100%288,099
statefp100%288,099
countyfp100%288,099
countyname100%288,099
cousubfp100%288,099
cousubname100%288,099
tractce100%288,099
tractname100%288,099
taxacctnum100%288,092
taxyear97.7%281,333
taxdistrict97.7%281,333
usecode97.9%281,946
usedesc97.9%281,950
zoningcode97.7%281,333
zoningdesc97.6%281,294
numbldgs100%288,099
numunits97.6%281,179
yearbuilt97.9%281,971
numfloors97.7%281,447
bldgsqft97.7%281,333
bedrooms<0.1%0
halfbaths<0.1%0
fullbaths<0.1%0
imprvalue88.8%255,927
landvalue94.1%271,120
agvalue0.7%1,916
totalvalue<0.1%0
taxacres97.9%281,932
calcarea100%288,099
saleamt62.8%180,953
saledate75.2%216,769
ownertype97.6%281,298
ownername97.6%281,298
owneraddr97.6%281,314
ownercity97.7%281,338
ownerstate97.6%281,226
ownerzip97.6%281,247
parceladdr100%288,058
parcelcity99.9%287,734
parcelstate100%288,099
parcelzip100%288,099
legaldesc97.9%281,946
township<0.1%0
section<0.1%0
qtrsection<0.1%0
range<0.1%0
plssdesc<0.1%0
book96.1%276,951
page96.1%276,948
block81.2%234,054
lot87.4%251,703
parceltype2.2%6,396
accesstype2.2%6,396
iucnclass1.1%3,272
placename5.4%15,444
placetype5.3%15,269
firmid100%288,095
firmdate100%288,095
fldzone100%288,095
zonesubty99.5%286,591
staticbfe<0.1%1
elevmin2.2%6,313
elevmax2.2%6,313
elevavg2.2%6,313
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
naicscode7.9%22,897
frsid<0.1%0
dfrurl<0.1%0
caapermit<0.1%0
cwapermit<0.1%0
rcrapermit<0.1%0
updated100%288,099
centroidx100%288,099
centroidy100%288,099
surfpointx100%288,099
surfpointy100%288,099
geom100%288,099
extras100%288,099
ownerlist97.1%279,858
placefp94.4%271,872
zoningurl<0.1%0

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 2026-08-30 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 97.7% taxyear 100% updated 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 97.7% taxdistrict 97.9% usecode 97.9% usedesc 97.7% zoningcode 97.6% zoningdesc 100% numbldgs 97.6% numunits 97.9% yearbuilt 97.7% numfloors 97.7% bldgsqft 88.8% imprvalue 94.1% landvalue 97.9% taxacres 62.8% saleamt 75.2% saledate 97.9% legaldesc 96.1% book 96.1% page 81.2% block 87.4% lot 97.1% ownerlist 94.4% placefp 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 ownerlist placefp publish.parcel_layer columns not fed by these sources (32) — 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, zoningurl 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 288,099 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.

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Attribute coverageSchema mappingNeighboring countiesFAQRelated