Home values, rents and more in ZIP code 20634 (Great Mills, MD)
September 2026 figures from Zillow and the U.S. Census Bureau · updated 2026-11-07
Open 20634 in ProMap- Under $370k
- $370k–$440k
- $440k–$460k
- $460k–$490k
- $490k+
- No data
How 20634 compares
The typical home in ZIP code 20634 (Great Mills, MD) is worth about $368,000, according to the Zillow Home Value Index for September 2026. Home values in 20634 are 19% below the typical value in the Lexington Park metro area ($453,000) and about the same as the U.S. typical value ($366,000).
Over the past year, home values in 20634 rose 1.4%, compared with +1.9% in the Lexington Park metro area and +1.2% nationally.
The median household income is $139,375, against $126,256 in the Lexington Park metro area and $80,734 in the U.S. (Census Bureau, American Community Survey 2020–24).
About 7,088 people live in 20634 (American Community Survey 2020–24).
20634 has the 3rd-lowest typical home value of the 34 ZIP codes in the Lexington Park metro area and the 133rd-lowest of 423 in Maryland with Zillow figures.
Part of: St. Mary's County, MD · Lexington Park metro area · Maryland
More for 20634 in ProMap Plus
These measures are on the map for subscribers. Open ProMap to see them for 20634 and every other place.
- 5- and 10-year price changes
- Days on market and months of supply
- Price cuts and sale-to-list ratio
- Price-to-income and monthly cost to buy
- Zillow 12-month price forecast
- Crime rates
- School test scores
- Homeowners insurance premiums
- Commute time to downtown
- Flood, wildfire and natural hazard risk
- Property-tax rate
- 2024 presidential vote
- Age, education and household make-up
- Amenities and transit nearby
Nearby ZIP codes
Sources
Home values: Zillow Home Value Index (ZHVI), all homes, middle tier, smoothed and seasonally adjusted, September 2026. Rents: Zillow Observed Rent Index (ZORI), seasonally adjusted. Population: Census population estimates (July 2025) for states, metros and counties; ACS 2020–24 for cities and ZIP codes. Income: U.S. Census Bureau, ACS 2020–24 5-year estimates. Boundaries: U.S. Census Bureau cartographic boundary files. Compiled by Home Economics.
"Typical" is Zillow's middle-tier value (homes between the 35th and 65th percentiles), not a median sale price. Changes are over the 12 months to September 2026.