What the Pros Know
Market Snapshot
Zip Code 20621 | St. Mary, MD
775
Population
YoY
202260.2
Median Age
YoY
2022$0
Median Household Income
YoY
2022$290,000
Median Sale Price
4.5% MoM
32.6% YoY
6/20253
Homes Sold
50.0% MoM
50.0% YoY
6/20251.3
Months Inventory
11.1% MoM
YoY
6/2025110
Days on Market
0 MoM
62 YoY
6/20254
Listings
33.3% MoM
100.0% YoY
6/2025187
Price per Sq Ft
25.3% MoM
7.8% YoY
6/2025
See 20621 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.