What the Pros Know
Market Snapshot
Zip Code 20687 | St. Mary, MD
360
Population
YoY
202238.3
Median Age
YoY
2022$143,468
Median Household Income
YoY
2022$466,000
Median Sale Price
913.0% MoM
31.3% YoY
6/20251
Homes Sold
0.0% MoM
66.7% YoY
6/20256.0
Months Inventory
14.3% MoM
1400% YoY
6/2025399
Days on Market
388 MoM
343 YoY
6/20256
Listings
14.3% MoM
50.0% YoY
6/2025421
Price per Sq Ft
30.9% MoM
861.8% YoY
6/2025
See 20687 on Zillow
1. Population Data from U.S. Census Bureau.
2. Sales Data provided by Redfin, a national real estate brokerage.
MoM = Month over Month. The percentage change from the previous month to the current month.
YoY = Year over Year. The percentage change from the same period the previous year to the current period.