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St. Mary's County, MD Parcels & GIS Data

St. Mary's County, MD parcel data: 59,022 property records with owner names, assessed values, land use, acreage, and addresses. Preview and download.

Land Records publishes St. Mary's County, Maryland parcel data covering 59,022 property records.

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

St. Mary's County, established in 1637, is located in the U.S. state of Maryland. As of the 2020 census, the population was 113,777.

FIPS 24037

Official county website: http://www.co.saint-marys.md.us

The FIPS code for St. Mary's County is 24037.

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Attribute coverage

St. Mary's County contains 59,022 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%59,022
parcelid98.9%58,348
parcelid299.8%58,916
ogparcelid98.9%58,348
ogparcelid298.8%58,312
parentid<0.1%0
stackid<0.1%0
geoid100%59,022
statefp100%59,022
countyfp100%59,022
countyname100%59,022
cousubfp100%59,022
cousubname100%59,022
tractce100%59,022
tractname100%59,022
taxacctnum100%59,019
taxyear100%59,022
taxdistrict3.8%2,233
usecode87.6%51,711
usedesc93.4%55,149
zoningcode90.1%53,197
zoningdesc11.0%6,485
numbldgs82.8%48,853
numunits97.2%57,379
yearbuilt77.4%45,698
numfloors88.7%52,334
bldgsqft97.1%57,296
bedrooms<0.1%0
halfbaths<0.1%0
fullbaths<0.1%0
imprvalue97.3%57,410
landvalue98.5%58,151
agvalue60.9%35,915
totalvalue98.5%58,151
taxacres98.0%57,838
calcarea100%59,022
saleamt96.3%56,858
saledate91.7%54,125
ownertype74.1%43,721
ownername74.1%43,721
owneraddr96.4%56,889
ownercity96.4%56,887
ownerstate96.4%56,881
ownerzip96.4%56,879
parceladdr83.6%49,321
parcelcity96.5%56,973
parcelstate100%59,022
parcelzip100%59,021
legaldesc96.4%56,918
township<0.1%0
section<0.1%0
qtrsection<0.1%0
range<0.1%0
plssdesc<0.1%0
book90.7%53,531
page90.7%53,515
block13.2%7,771
lot70.3%41,497
parceltype0.9%502
accesstype2.4%1,391
iucnclass1.3%758
placename5.3%3,105
placetype5.2%3,078
firmid100%59,020
firmdate100%59,020
fldzone100%59,020
zonesubty96.3%56,814
staticbfe3.3%1,965
elevmin99.3%58,617
elevmax99.3%58,617
elevavg99.3%58,617
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
naicscode3.0%1,754
frsid<0.1%0
dfrurl<0.1%0
caapermit<0.1%0
cwapermit<0.1%0
rcrapermit<0.1%0
updated100%59,022
centroidx100%59,022
centroidy100%59,022
surfpointx100%59,022
surfpointy100%59,022
geom100%59,022
extras100%59,022
ownerlist62.4%36,802
placefp43.0%25,366
zoningurl90.2%53,214
lbcsactivity95.4%56,327
lbcsfunction95.4%56,310
lbcstype95.2%56,201
lbcscharacter96.1%56,732
lbcsownership75.2%44,379
sourceurl96.5%56,971

Schema mapping

How source columns from the acquired St. Mary's 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 — St. Mary's County, Maryland (24037) 2 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 polyid map grid parcel acctid lu desclu zoning bldg_units yearblt bldg_story sqftstrc nfmimpvl nfmlndvl nfmttlvl acres considr1 tradate ownadd1 ownadd2 owncity ownstate ownerzip address city zipcode legal1 legal2 legal3 section pltliber pltfolio block lot polydate sdatwebadr geom desctown id jurscode geogcode ooi resityp strtnum strtdir strtnam strttyp strtsfx strtunt addrtyp ownzip2 premsnum premsdir premsnam premstyp premcity premzip premzip2 dr1liber dr1folio towncode subdivsn dsubcode descsubd plat znchgdat rzrealdat ciuse descciuse exclass descexcl landarea luom width depth pfuw pfus pflw pfsp pfsu pfic pfih recind permittyp strugrad descgrad strucnst desccnst strustyl descstyl strubldg descbldg lastinsp lastassd assessor gr1libr1 gr1folo1 convey1 crtarcod fcmacode agfndarea entzndat entznassm plndevdat nprctstdat nprcarea nprcluom homqlcod homqldat ptype mdpvdate sdatdate polyacres starea__ stlength__ parcelid parcelid2 taxacctnum usecode usedesc zoningcode numunits yearbuilt numfloors bldgsqft imprvalue landvalue totalvalue taxacres saleamt saledate owneraddr ownercity ownerstate ownerzip parceladdr parcelcity parcelzip legaldesc section book page block lot updated sourceurl geom taxdistrict 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% taxyear geom · derived from geometry geom dem.us_1m · USGS 1m DEM 99.3% elevmin 99.3% elevmax 99.3% elevavg s_fld_haz_ar · FEMA NFHL 100% fldzone 96.3% zonesubty 3.3% staticbfe 100% firmdate 100% firmid supplemented · derived / other pipelines 82.8% numbldgs 60.9% agvalue 74.1% ownertype 74.1% ownername 100% parcelstate 62.4% ownerlist 90.2% zoningurl 95.4% lbcsactivity 95.4% lbcsfunction 95.2% lbcstype 96.1% lbcscharacter 75.2% lbcsownership lrid parcelid parcelid2 ogparcelid ogparcelid2 geoid statefp countyfp countyname cousubfp cousubname tractce tractname taxacctnum taxyear taxdistrict usecode usedesc zoningcode numbldgs numunits yearbuilt numfloors bldgsqft imprvalue landvalue agvalue totalvalue taxacres calcarea saleamt saledate ownertype ownername owneraddr ownercity ownerstate ownerzip parceladdr parcelcity parcelstate parcelzip legaldesc section book page block lot firmid firmdate fldzone zonesubty staticbfe elevmin elevmax elevavg updated centroidx centroidy surfpointx surfpointy geom extras ownerlist zoningurl lbcsactivity lbcsfunction lbcstype lbcscharacter lbcsownership sourceurl publish.parcel_layer columns not fed by these sources (30) — empty or below 50% fill in this county parentid, stackid, zoningdesc, bedrooms, halfbaths, fullbaths, township, qtrsection, range, plssdesc, parceltype, accesstype, iucnclass placename, placetype, fireplaces, heating, heatfuel, cooling, foundation, roofcover, siding, bldgtype, naicscode, frsid, dfrurl, caapermit cwapermit, rcrapermit, placefp PARCEL 34 mapped · 4 transformed · 21 unmapped (NULL) SOURCE COLUMNS HARMONIZED → PARCEL polyid map grid parcel acctid lu desclu zoning bldg_units yearblt bldg_story sqftstrc nfmimpvl nfmlndvl nfmttlvl acres considr1 tradate ownadd1 ownadd2 owncity ownstate ownerzip address city zipcode legal1 legal2 legal3 section pltliber pltfolio block lot polydate sdatwebadr geom desctown id jurscode geogcode ooi resityp strtnum strtdir strtnam strttyp strtsfx strtunt addrtyp ownzip2 premsnum premsdir premsnam premstyp premcity premzip premzip2 dr1liber dr1folio towncode subdivsn dsubcode descsubd plat znchgdat rzrealdat ciuse descciuse exclass descexcl landarea luom width depth pfuw pfus pflw pfsp pfsu pfic pfih recind permittyp strugrad descgrad strucnst desccnst strustyl descstyl strubldg descbldg lastinsp lastassd assessor gr1libr1 gr1folo1 convey1 crtarcod fcmacode agfndarea entzndat entznassm plndevdat nprctstdat nprcarea nprcluom homqlcod homqldat ptype mdpvdate sdatdate polyacres starea__ stlength__ parcelid parcelid2 CASE WHEN map IS NOT NULL AND TRIM(map) <> '' AND grid IS NOT N… taxacctnum usecode usedesc zoningcode numunits yearbuilt numfloors bldgsqft imprvalue landvalue totalvalue taxacres saleamt saledate owneraddr CASE WHEN ownadd1 IS NULL AND ownadd2 IS NULL THEN NULL::text W… ownercity ownerstate ownerzip parceladdr parcelcity parcelzip legaldesc NULLIF(concat_ws('; ', legal1::text, legal2::text, legal3::text… section book page block lot updated sourceurl geom taxdistrict extras (json_build_object( 'id', id::text, 'jurscode', jurscode::text,… not present in source — filled with NULL (21) taxyear, zoningdesc, numbldgs, bedrooms, halfbaths, fullbaths, agvalue, ownername, parcelstate, township, qtrsection, range, plssdesc, parentid heatfuel, fireplaces, heating, cooling, foundation, roofcover, siding 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 St. Mary's County:

Frequently asked questions

Where can I find St. Mary's County, MD parcel and GIS data?

Land Records publishes a St. Mary's 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 St. Mary's County, MD dataset as a GeoPackage or CSV.

How many parcels are in St. Mary's County, MD?

The current dataset contains 59,022 parcel records for St. Mary's County, MD, each with its boundary geometry and assessor attributes.

What is the FIPS code for St. Mary's County, MD?

The FIPS code for St. Mary's County, MD is 24037.

What information does each St. Mary's County, MD parcel record include?

Each St. Mary's 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 St. Mary's County, MD parcel data free?

You can preview St. Mary's 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 St. Mary's County, MD have an official GIS or property records website?

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

On this page

Attribute coverageSchema mappingNeighboring countiesFAQRelated