| ZIP Code | 20818 |
|---|---|
| City | Cabin John |
| State | Maryland (MD) |
| County | Montgomery County |
| Area Code | 227/240/301 |
| Elevation | 207 ft |
| Latitude | 38.973486 |
|---|---|
| Longitude | -77.162389 |
| Timezone | New York (DST) |
| FIPS | 24031 |
| ZIP Type | Standard |
| Status | Active |
Race & Ethnicity
Age Breakdown
Key Indicators
| Median Age | 49.0 yrs |
|---|---|
| Avg Household Size | 2.69 |
| Below Poverty | 0.1% ▼ 99% below avg |
| College Grads | 85.7% ▲ 121% above avg |
| Unemployment | 0.0% ▼ 100% below avg |
| HS Graduate | 90 (10.2%) |
| Associates | 37 (4.2%) |
| Graduate Degree | 758 (85.6%) |
Education
Housing Tenure
Home Value Distribution
Financials
| Median HH Income | $221,392 ▲ 190% above avg ↑ 23% since 2019 |
|---|---|
| Median Home Value | $1,273,300 ▲ 357% above avg ↑ 38% since 2019 |
| Home/Income Ratio | 5.8x (nat avg ~3.5x) |
| Total Units | 658 |
| Vacant Units | 63 |
| Avg HH Size | 2.69 |
Income Distribution
How People Get to Work
Commute Time
Year Built
Summary
| Total Units | 658 |
|---|---|
| Vacant | 63 |
| Owner Occupied | 94.1% |
| Renter Occupied | 5.9% |
| Avg HH Size | 2.69 |
ZIP code 20818 is located in Cabin John, Maryland, within Montgomery County. With a population of 1,602, this is a sparsely populated ZIP code with a mature community — the median age is 49 years. Economically, 20818 is a affluent ZIP code: the median household income of $221,392 is more than double the national average.
Real estate in ZIP code 20818 represents among the most expensive housing markets in the country. The median home value of $1,273,300 is more than double the national average. Homeownership is strong here — 94.1% of occupied units are owner-occupied, suggesting an established, stable residential community. Median home values have increased by 38% since 2019.
The population of 20818 is majority White (58.49%). Residents are highly educated — 85.7% hold a bachelor's degree or higher, which is more than double the national average. Poverty affects a relatively small share of residents at 0.1%. Household income has grown by 23% since 2019.
A notably high share of workers — 39% — work from home, reflecting the professional makeup of the area. As in most parts of the country, driving alone is the dominant commute mode at 49%.
Overall, ZIP code 20818 in Cabin John, MD is characterized as affluent, highly educated, a mature community, and predominantly owner-occupied. With 1,602 residents, a median household income of $221,392, and a median home value of $1,273,300, it offers a clear picture of life in this part of Maryland.