Montgomery County, MD Parcels & GIS Data Montgomery County, MD parcel data: 357,342 property records with owner names, assessed values, land use, acreage, and addresses. Preview and download.
Land Records publishes Montgomery County, Maryland parcel data covering 357,342 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.
Howard Frederick Loudoun Fairfax Arlington District of Columbia Prince George's Montgomery
Montgomery County contains 357,342 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.
Column Coverage Records populated lrid100% 357,342 parcelid25.2% 90,183 parcelid280.0% 285,764 ogparcelid25.2% 90,185 ogparcelid279.8% 285,046 parentid13.3% 47,532 stackid20.4% 72,748 geoid100% 357,342 statefp100% 357,342 countyfp100% 357,342 countyname100% 357,342 cousubfp100% 357,342 cousubname100% 357,342 tractce100% 357,342 tractname100% 357,342 taxacctnum80.0% 285,829 taxyear98.0% 350,373 taxdistrict90.4% 322,861 usecode98.2% 351,016 usedesc99.7% 356,094 zoningcode97.7% 349,090 zoningdesc99.2% 354,529 numbldgs100% 357,342 numunits97.9% 349,909 yearbuilt98.2% 351,018 numfloors98.1% 350,392 bldgsqft98.1% 350,438 bedrooms<0.1% 0 halfbaths<0.1% 0 fullbaths<0.1% 0 imprvalue91.5% 327,035 landvalue95.3% 340,590 agvalue0.5% 1,914 totalvalue74.9% 267,585 taxacres98.2% 351,064 calcarea100% 357,342 saleamt70.5% 252,032 saledate91.4% 326,535 ownertype0.3% 934 ownername98.0% 350,367 owneraddr98.1% 350,481 ownercity98.1% 350,499 ownerstate98.0% 350,310 ownerzip98.0% 350,360 parceladdr98.1% 350,569 parcelcity98.1% 350,564 parcelstate100% 357,342 parcelzip100% 357,342 legaldesc98.2% 351,041 township<0.1% 0 section<0.1% 0 qtrsection<0.1% 0 range<0.1% 0 plssdesc<0.1% 0 book96.5% 344,814 page96.5% 344,811 block70.2% 250,978 lot71.4% 255,144 parceltype1.8% 6,341 accesstype2.0% 7,286 iucnclass1.1% 3,909 placename18.3% 65,254 placetype18.1% 64,622 firmid100% 357,338 firmdate100% 357,338 fldzone100% 357,338 zonesubty99.5% 355,524 staticbfe<0.1% 1 elevmin2.2% 7,718 elevmax2.2% 7,718 elevavg2.2% 7,718 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 naicscode15.7% 56,181 frsid<0.1% 0 dfrurl<0.1% 0 caapermit<0.1% 0 cwapermit<0.1% 0 rcrapermit<0.1% 0 updated100% 357,342 centroidx100% 357,342 centroidy100% 357,342 surfpointx100% 357,342 surfpointy100% 357,342 geom100% 357,342 extras100% 357,342 ownerlist0.3% 921 placefp94.7% 338,225 zoningurl97.7% 349,152 lbcsactivity99.7% 356,150 lbcsfunction97.5% 348,523 lbcstype99.9% 356,871 lbcscharacter99.2% 354,480 lbcsownership98.2% 350,762 sourceurl90.6% 323,651
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)
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
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 owneraddr ownercity ownerstate ownerzip parceladdr parcelcity parcelstate parcelzip geom REFTABLE
tax_no parcel_no assmt_date new_landusecode zone_ no_dwellings year_built gr_flr_area improv_assmt land_assmt acre_or_sqft sdat_area sales_price transfer_date sort_key owners_addr1 owners_addr2 owners_city owners_state owners_zip premise_addr_city premise_addr_zip legal_desc liber folio block lot landuse_code lu_category publicuse_type premise_addr_houseno premise_addr_street premise_addr_direction premise_addr_street_type condo_unit_no condoflr subdivision cdistrict municip dwellingtype_name no_stories dwelling_grade dwelling_condition dwellingconstrcode_name district parent_tax_no geom xstateco ystateco geomethd planning policy master_plan basemap taxmap policy_agp cbpteam watrshed status town_code tax_class pref_assmt exempt_code grid subparcel property_code az_code azcode_name dwellstoryname premise_addr_zip_plus4 owners_occupancy owners_addr3 owners_zip_plus4 dwelling_type lot_width lot_depth dwelling_construct_code dwelling_story_code utilities_water utilities_sewer location_waterfront street_paved street_unpaved commer_indus historical clerk_plat public_use_code activity_date creation_date deletion_date razed multiparent_ind razed_date outlot assesscyl tax_zone load_date lucheck exempt_desc latitude longitude parcelid parcelid2 taxyear usecode zoningcode numbldgs yearbuilt bldgsqft imprvalue landvalue taxacres saleamt saledate ownername owneraddr ownercity ownerstate ownerzip parcelcity parcelzip legaldesc book page block lot landusecode landusedesc category house_number road unit level suburb city_district city bldgtype numfloors bldgquality bldgcondition extwall taxdistrict parentid geom extras ZONING
genzone source geom jurscode municipality_name abbreviation updateyr acres genzone_cat shape_starea__ shape_stlength__ globalid created_user created_date last_edited_user last_edited_date zoningcode sourceurl geom extras determined · ground truth
100%
lrid 100%
geoid 100%
statefp 100%
countyfp 100%
countyname 100%
cousubfp 100%
cousubname 100%
tractce 100%
tractname 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
80.0%
taxacctnum 100%
usedesc 99.2%
zoningdesc 97.9%
numunits 74.9%
totalvalue 94.7%
placefp 97.7%
zoningurl 100%
lbcsactivity 97.5%
lbcsfunction 100%
lbcstype 99.2%
lbcscharacter 98.2%
lbcsownership lrid parcelid parcelid2 ogparcelid ogparcelid2 parentid geoid statefp countyfp countyname cousubfp cousubname tractce tractname taxacctnum taxyear taxdistrict usecode usedesc zoningcode zoningdesc numbldgs numunits yearbuilt numfloors bldgsqft imprvalue landvalue totalvalue 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 bldgtype updated centroidx centroidy surfpointx surfpointy geom extras placefp zoningurl lbcsactivity lbcsfunction lbcstype lbcscharacter lbcsownership sourceurl publish.parcel_layer columns not fed by these sources (29) — empty or below 50% fill in this county
stackid, bedrooms, halfbaths, fullbaths, agvalue, township, section, qtrsection, range, plssdesc, parceltype, accesstype, iucnclass, placename
placetype, fireplaces, heating, heatfuel, cooling, foundation, roofcover, siding, naicscode, frsid, dfrurl, caapermit, cwapermit, rcrapermit
ownerlist
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 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
REFTABLE
44 mapped · 9 transformed · 78 unmapped (NULL)
SOURCE COLUMNS
HARMONIZED → REFTABLE
tax_no parcel_no assmt_date new_landusecode zone_ no_dwellings year_built gr_flr_area improv_assmt land_assmt acre_or_sqft sdat_area sales_price transfer_date sort_key owners_addr1 owners_addr2 owners_city owners_state owners_zip premise_addr_city premise_addr_zip legal_desc liber folio block lot landuse_code lu_category publicuse_type premise_addr_houseno premise_addr_street premise_addr_direction premise_addr_street_type condo_unit_no condoflr subdivision cdistrict municip dwellingtype_name no_stories dwelling_grade dwelling_condition dwellingconstrcode_name district parent_tax_no geom xstateco ystateco geomethd planning policy master_plan basemap taxmap policy_agp cbpteam watrshed status town_code tax_class pref_assmt exempt_code grid subparcel property_code az_code azcode_name dwellstoryname premise_addr_zip_plus4 owners_occupancy owners_addr3 owners_zip_plus4 dwelling_type lot_width lot_depth dwelling_construct_code dwelling_story_code utilities_water utilities_sewer location_waterfront street_paved street_unpaved commer_indus historical clerk_plat public_use_code activity_date creation_date deletion_date razed multiparent_ind razed_date outlot assesscyl tax_zone load_date lucheck exempt_desc latitude longitude parcelid parcelid2 taxyear usecode zoningcode numbldgs yearbuilt NULLIF(year_built, 0)::text
bldgsqft imprvalue landvalue taxacres CASE WHEN upper(trim(acre_or_sqft::text)) = 'A' THEN sdat_area:…
saleamt NULLIF(sales_price, 0)::text
saledate CASE WHEN transfer_date IS NULL OR transfer_date = 0 THEN NULL:…
ownername owneraddr NULLIF(CONCAT_WS(', ', owners_addr1::text, owners_addr2::text),…
ownercity ownerstate ownerzip NULLIF(owners_zip, 0)::text
parcelcity parcelzip NULLIF(premise_addr_zip, 0)::text
legaldesc book page block lot landusecode landusedesc category house_number road CASE WHEN premise_addr_street IS NULL OR TRIM(premise_addr_stre…
unit level suburb city_district city bldgtype numfloors bldgquality bldgcondition extwall taxdistrict parentid geom extras ( json_build_object( 'xstateco', xstateco::text, 'ystateco', ys…
not present in source — filled with NULL (78)
taxacctnum, usedesc, zoningdesc, numunits, bedrooms, halfbaths, fullbaths, agvalue, totalvalue, parceladdr, parcelstate, township, section
qtrsection, range, plssdesc, zoningtype, zoningordinance, zoningsetbacks, zoningrestrictions, lbcsdimension, lbcscode, house, near, staircase
entrance, po_box, postcode, island, state_district, state, country_region, country, world_region, yearremodel, livingarea, architecture
totalrooms, fireplaces, heating, cooling, foundation, attic, atticsqft, intwall, roofstyle, roofcover, roofheight, fsagpfeet, siding, framing
basementsqft, attgaragesqft, detgaragesqft, garagestalls, situsaddress, appraisedvalue, assessedvalue, boatlift, boatdock, boathouse, pool
gazebo, irrigation, riprap, solarium, carport, greenhouse, openporch, enclporch, sauna, wooddeck, hottub, patio, shed, workshop, sourceurl
heatfuel
ZONING
4 mapped · 1 transformed · 6 unmapped (NULL)
SOURCE COLUMNS
HARMONIZED → ZONING
genzone source geom jurscode municipality_name abbreviation updateyr acres genzone_cat shape_starea__ shape_stlength__ globalid created_user created_date last_edited_user last_edited_date zoningcode sourceurl geom extras json_build_object( 'jurscode', jurscode::text, 'municipality_na…
not present in source — filled with NULL (6)
zoningdesc, zoningtype, ordinance, setbacks, restrictions, notes Neighboring counties Parcel data for counties bordering Montgomery County:
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 357,342 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.
