ZIP Code 20684
ZIP Code Tabulation Area in St. Mary's County, Maryland.
- Population
- 825
- Median household income
- $176,938
- Median home value
- $375,500
-22.6%’19–’23
+64.6%’19–’23
+24.0%’19–’23
ZIP Code 20684 (St. Mary's County, Maryland) is home to about 825 residents. The median household income of $176,938 is above the St. Mary's County median ($114,580).
Between 2019 and 2023, ZIP Code 20684's population declined 22.6% from 1,066 to 825, while its median household income rose 64.6% from $107,500 to $176,938.
79.3% of workers drive to work alone. 95.5% of homes are single-family detached houses.
Demographics
ACS 2019–2023- Population
- 825
- Median age
- 44.5 yrs
- Median household income
- $176,938
- Median home value
- $375,500
- Median gross rent
- —
- Housing units
- 355
- Homeownership rate
- 94.6%
- Bachelor's degree or higher
- 50.7%
- Unemployment rate
- 0.0%
Trends
ACS 5-year · 2019–20231,066825
$107,500$176,938
$302,800$375,500
| Year | Population | Median household income | Median home value | Median gross rent |
|---|---|---|---|---|
| 2019 | 1,066 | $107,500 | $302,800 | — |
| 2020 | 784 | $119,821 | $316,500 | — |
| 2021 | 775 | $102,361 | $320,000 | $892 |
| 2022 | 627 | $137,188 | $397,900 | — |
| 2023 | 825 | $176,938 | $375,500 | — |
Each year is a US Census Bureau ACS 5-year estimate ending that year.
Age distribution
Under 50.0%
5 to 1713.5%
18 to 246.4%
25 to 349.1%
35 to 4424.7%
45 to 5413.1%
55 to 6410.4%
65 to 7415.4%
75 and over7.4%
| Count | Share | |
|---|---|---|
| Under 5 | 0 | 0.0% |
| 5 to 17 | 111 | 13.5% |
| 18 to 24 | 53 | 6.4% |
| 25 to 34 | 75 | 9.1% |
| 35 to 44 | 204 | 24.7% |
| 45 to 54 | 108 | 13.1% |
| 55 to 64 | 86 | 10.4% |
| 65 to 74 | 127 | 15.4% |
| 75 and over | 61 | 7.4% |
Race & ethnicity
| Count | Share | |
|---|---|---|
| White (non-Hispanic) | 725 | 87.9% |
| Black or African American | 10 | 1.2% |
| American Indian & Alaska Native | 0 | 0.0% |
| Asian | 0 | 0.0% |
| Native Hawaiian & Pacific Islander | 0 | 0.0% |
| Some other race | 0 | 0.0% |
| Two or more races | 89 | 10.8% |
| Hispanic or Latino (any race) | 1 | 0.1% |
Educational attainment (age 25+)
No high school diploma0.0%
High school graduate37.2%
Some college or associate's12.1%
Bachelor's degree41.0%
Graduate or professional degree9.7%
| Count | Share | |
|---|---|---|
| No high school diploma | 0 | 0.0% |
| High school graduate | 246 | 37.2% |
| Some college or associate's | 80 | 12.1% |
| Bachelor's degree | 271 | 41.0% |
| Graduate or professional degree | 64 | 9.7% |
Commute to work
- Mean travel time to work
- 23 min
Drove alone79.3%
Carpooled0.0%
Public transit0.0%
Walked0.4%
Bicycle0.0%
Worked from home17.2%
Other means3.1%
How workers get to work
| Count | Share | |
|---|---|---|
| Drove alone | 364 | 79.3% |
| Carpooled | 0 | 0.0% |
| Public transit | 0 | 0.0% |
| Walked | 2 | 0.4% |
| Bicycle | 0 | 0.0% |
| Worked from home | 79 | 17.2% |
| Other means | 14 | 3.1% |
Travel time
| Count | Share | |
|---|---|---|
| Under 15 min | 54 | 14.2% |
| 15 to 29 min | 219 | 57.6% |
| 30 to 44 min | 90 | 23.7% |
| 45 to 59 min | 17 | 4.5% |
| 60+ min | 0 | 0.0% |
Households
- Average household size
- 2.32
- Poverty rate
- 1.1% (9 of 822)
| Count | Share | |
|---|---|---|
| Family households | 278 | 78.3% |
| Nonfamily households | 77 | 21.7% |
Housing
- Median year structure built
- 1995
Occupancy
| Count | Share | |
|---|---|---|
| Occupied | 355 | 100.0% |
| Vacant | 0 | 0.0% |
Tenure (of occupied units)
| Count | Share | |
|---|---|---|
| Owner-occupied | 336 | 94.6% |
| Renter-occupied | 19 | 5.4% |
1-unit, detached95.5%
1-unit, attached4.5%
2 to 4 units0.0%
5 to 19 units0.0%
20 or more units0.0%
Mobile home & other0.0%
Units in structure
| Count | Share | |
|---|---|---|
| 1-unit, detached | 339 | 95.5% |
| 1-unit, attached | 16 | 4.5% |
| 2 to 4 units | 0 | 0.0% |
| 5 to 19 units | 0 | 0.0% |
| 20 or more units | 0 | 0.0% |
| Mobile home & other | 0 | 0.0% |
Geography
- ZCTA
- 20684
- Land area
- 8.34 sq mi
- Water area
- 3.39 sq mi
- Center point
- 38.1255, -76.4205
Counties this ZIP covers
1Compare with nearby ZIP codes
6National ZIP rankings
21- Largest by population
- Most densely populated
- Highest median household income
- Highest median home value
- Most affordable home values
- Highest median gross rent
- Cheapest median gross rent
- Oldest by median age
- Youngest by median age
- Most college-educated
- Highest poverty rate
- Lowest poverty rate
- Highest homeownership rate
- Lowest homeownership rate
- Longest commutes
- Shortest commutes
- Largest households
- Newest housing
- Oldest housing
- Fastest-growing (2019–2023)
- Fastest-shrinking (2019–2023)