St. Mary's County, MD Parcel Data
Ownership, APNs & Property Records

Parcel pages, assessor-sourced fields, and API lookup examples for St. Mary's County.

Parcel records in St. Mary's County

Browse indexed parcel pages for St. Mary's County, Maryland. Each page includes assessor-sourced property attributes, transfer history, and a stable parcel identifier for API lookups.

Properties indexed
61,205
Example APN format
07-006977
From Avenue

Fields on parcel pages

  • Parcel ID (APN)
  • Street address and unit
  • Transfer / sale history
  • Living area, beds, baths, year built
  • Lot size (acres)
  • Parcel boundary geometry (via API)

API lookup example

Query by state, county, and parcel ID (Bearer token required). See Property Data API and API reference.

curl -G 'https://app.realie.ai/api/public/property/parcelId' \
  -H 'Authorization: Bearer YOUR_API_KEY' \
  --data-urlencode state='MD' \
  --data-urlencode county='ST. MARY'\''S' \
  --data-urlencode parcelId='07-006977'

MCP and CLI workflows are documented at docs.realie.ai/realie-mcp-server.

Maryland

ZIP Codesby Total Population

Loading map...
Total Population
1426,852

DistributionTotal Population

Demographics

Total Population

115,126

Median Age

37.2

Population Under 18

23.9%

Population 65+

14.0%

Total Households

42,436

Average Household Size

2.65

St. Mary's County, MD housing and demographic statistics

Selected Census estimates for St. Mary's County, MD
MeasureEstimate
Population115,126
Households42,436
Housing units46,385
Median household income$119,446
Median monthly gross rent$1,747
Median owner-occupied home value$407,600
Owner-occupied share of occupied housing73.2%
Vacant share of housing units8.5%
Renters paying 30% or more of income on rent42.8%

Source: U.S. Census Bureau American Community Survey (ACS), 2020–2024 five-year estimates, via Realie. Measurement period: –. Published by the Census Bureau on ; published by Realie on . These are five-year estimates, not a measurement of current conditions.

Area property statistics

Recorded property characteristics and residential parcel-sale records for St. Mary's County, MD. Sale amounts describe recorded transfers, not asking prices or appraisals. Each measure uses records with that information available.

Sale records use the AVM's residential, amount, floor-area, year-built, price-per-area, deed, buyer-relationship and distress filters. Known multi-parcel deals are also excluded. Unknown package flags are not proof of a single-parcel sale. Counts represent eligible parcel sale records. Recorded annual averages require at least 10 eligible sales. Projections must have enough history and pass checks against earlier recorded sales. Recent sales can be underreported; different coverage between years can affect the changes.

Annual sales comparison

Calendar 2025 recorded sales versus calendar 2026 model projections. Both years cover January 1–December 31. Change compares the 2026 projection with the recorded 2025 value. Annual average amounts weight each month by its sales count; they are not monthly medians.

Calendar-year sales comparison
Metric20252026 projectedChange (%)
Residential sale records1,533Recorded1,393Model estimateRange: 1,253–1,348-9.1%
Average recorded sale amount$435,502Recorded$489,413Model estimate+12.4%

Projections are not confirmed transactions or property valuations. Recent sales can be underreported; different coverage between years can affect the change. Unsupported values remain unavailable. Ranges reflect historical model errors, not confidence intervals. Annual comparison calculated . Assumed observation cutoff: June 2026; not verified completeness.

Recorded property statistics

Reported property statistics for St. Mary's County, MD
MeasureSt. Mary's County, MDMaryland
Median recorded sale amount$424,000$426,000
Recorded amount, 10th percentile$225,000$200,000
Recorded amount, 90th percentile$663,920$875,000
Average recorded floor area (sq ft)2,1882,127
Average recorded bedrooms3.53.4
Average recorded bathrooms2.32.3
Median year built19911978
Condominium share of properties1.8%7.4%

St. Mary's County, MD: Recorded median and percentile amounts: May 7, 2025–Oct 28, 2026.

County input file published Oct 24, 2026. Calculated . Published . Dataset last refreshed: .

Maryland: Recorded median and percentile amounts: May 7, 2025–Oct 28, 2026.

State input files published Oct 24, 2026. Calculated . Published . Dataset last refreshed: .

Source: Realie property-record aggregates. Input publication and calculation dates do not establish complete transaction coverage. Missing measures are shown as — or omitted.

Other recent-period estimates

These use different periods from the calendar-year comparison. Estimates extend parcel-record counts and recorded amounts; they are not confirmed current transactions or individual-property values.

Parcel sale records
Oct 1, 2025–Sep 30, 2026
Unavailable
The estimate did not pass checks against recorded sales.
Median sale amount
September 2026
$442,784
Model estimateHistorical error-adjusted range: $409,293–$530,875.
Median-amount change
September 2026 versus September 2025
+11.3%
Model estimateHistorical error-adjusted range: +2.9%–+33.5%.

Transaction coverage has not been verified. Known multi-parcel deals are excluded; missing package flags do not establish that every remaining sale covers one parcel. Amount change compares monthly record medians, not the appreciation of the same homes. Ranges reflect historical model errors; they are not confidence intervals and can exclude the point estimate. Assumed observation cutoff: June 2026; not a verified completeness date.

Cities in St. Mary's County

Browse property data by city

More Counties in Maryland

Access St. Mary's County, MD Property Data Through Our Enterprise API

Get instant access to comprehensive county assessors-based property data with your free API key

Need Bulk Data?

Email us at hello@realie.ai