Saint Marys City, MD · standard
ZIP Code 20686
St. Mary's County, Maryland - Census ACS demographics, housing tenure, and business patterns, benchmarked against every US ZIP.
- 1,332
- 475/sq mi High-density area
- 100.0%
- Bachelor's or higher Above-average bachelor's attainment
National ZIP placement
Saint Marys City has 1,332 residents, placing it in the 35th percentile of the 33,099 US ZIP codes with a reported population, at 475 people per square mile.
Source: USPS ZIP record + U.S. Census Bureau ZIP population. Rank compares ZIP 20686 against every US ZIP with a reported population; income/home-value percentiles are not available for this ZIP.
ZIP code 20686 is a sparsely populated ZIP (a standard USPS delivery area) in Saint Marys City, St. Mary's County, Maryland, home to just 1,332 residents across 2.8 square miles, a density of 475 people per square mile, in the New York time zone.
Median household income is not on file for ZIP 20686, but per-capita income is $4,431. The poverty rate is -, with unemployment at 1.9%; those measures add context to the income figure. The ACS does not report a median home value for this ZIP, so housing cost context is limited to the available tenure and rent fields.
This is a highly-educated ZIP: 100.0% of adults hold a bachelor's degree or higher, the median age is 20.3, and the average commute is -. The page also surfaces 10 ZIP codes within roughly 10 miles and 6 more in St. Mary's County, so 20686 can be compared with both its immediate and county-level context.
Every figure on this page is sourced from the U.S. Census Bureau American Community Survey 5-Year Estimates (including median rent) and the FHFA House Price Index, no estimates, no proprietary scoring. Verify with Census →
Source: U.S. Census Bureau, American Community Survey 5-Year Estimates + ZIP Code Business Patterns + FHFA HPI ACS demographics and median rent, ZBP business establishments, FHFA HPI for ZIP 20686, Saint Marys City, MD · 2023 Census ACS 5-Year Estimates use a rolling 60-month sample for stable small-geography estimates; ZBP updated annually; FHFA HPI updated quarterly/annually.
Quick Facts
1,332
Population
2.8
Area (sq mi)
475
People / sq mi
New York
Time Zone
standard
ZIP Type
Who lives in ZIP 20686?
20.3
Median Age
35.3%
Male
64.7%
Female
4.2%
Foreign-Born
Hispanic or Latino is an ethnicity category from the Census Bureau and may overlap with other categories above.
Source: U.S. Census Bureau, ACS 5-Year Estimates (2023)
How much do residents earn?
$4,431
Per Capita Income
1.9%
Unemployment Rate
Source: U.S. Census Bureau, ACS 5-Year Estimates (2023)
What is the education profile here?
Source: U.S. Census Bureau, ACS 5-Year Estimates (2023)
What does housing look like?
0
Total Housing Units
0
Occupied Units
0
Vacant Units
Source: U.S. Census Bureau, ACS 5-Year Estimates (2023)
What businesses operate in this ZIP?
Census Bureau data shows 6 business establishments in ZIP 20686, employing approximately 72 people with a combined annual payroll of $1,680,000.
6
Businesses
72
Employees
$1.7M
Annual Payroll
1
Industry Sectors
| Industry | Establishments | % of Total |
|---|---|---|
| Accommodation and food services | 3 | 50.0% |
Source: U.S. Census Bureau, ZIP Code Business Patterns (ZBP), 2023. Employment figures may include noise for disclosure avoidance.
Nearby ZIP Codes
Want a side-by-side? Compare 20686 vs 20667 →
ZIP 20686 vs its nearest neighbors, by population
Resident population of this ZIP and the closest reporting ZIP codes within ~10 miles.
- 20653
Lexington Park (20653)
24,481 residents
- 20686 1,332
Saint Marys City (20686)
1,332 residents
- 20684 1,125
Saint Inigoes (20684)
1,125 residents
- 20680 1,119
Ridge (20680)
1,119 residents
- 20692 1,051
Valley Lee (20692)
1,051 residents
- 20670 1,014
Patuxent River (20670)
1,014 residents
- 20674 830
Piney Point (20674)
830 residents
- 20690 740
Tall Timbers (20690)
740 residents
- 20628 594
Dameron (20628)
594 residents
What this shows Among its immediate neighbors, ZIP 20686 ranks #2 by population - useful context the national average alone can't give.
| ZIP Code | City | Population | Distance |
|---|---|---|---|
| 20667 | Park Hall, MD | 494 | 2.7 mi |
| 20653 | Lexington Park, MD | 24,481 | 3.5 mi |
| 20630 | Drayden, MD | 348 | 2.5 mi |
| 20684 | Saint Inigoes, MD | 1,125 | 2.8 mi |
| 20692 | Valley Lee, MD | 1,051 | 3.8 mi |
| 20628 | Dameron, MD | 594 | 4.8 mi |
| 20670 | Patuxent River, MD | 1,014 | 7.1 mi |
| 20674 | Piney Point, MD | 830 | 4.9 mi |
| 20690 | Tall Timbers, MD | 740 | 5.5 mi |
| 20680 | Ridge, MD | 1,119 | 5.5 mi |
Nationwide ZIPs with similar ACS profiles
Two Census-derived peer sets for ZIP 20686, both outside MD so the neighborhoods are not geographic containment (Nearby and same-county blocks stay local).
Similar population
Nearest cross-state ZIPs by resident population (1,332 here; floor ≥1,000).
More ZIP Codes in St. Mary's County
Related Areas
Frequently Asked Questions
What county is ZIP code 20686 in?
ZIP code 20686 (Saint Marys City) is located in St. Mary's County, Maryland. St. Mary's County contains multiple ZIP codes, see the full list at /counties/st-marys-md.
What is the population of ZIP code 20686?
ZIP code 20686 in Saint Marys City, MD has a population of 1,332 according to the Census Bureau ACS 2023 estimates.
What is the demographic makeup of ZIP 20686?
The largest racial group in ZIP 20686 is White at 79.2%. Hispanic or Latino residents make up 3.2% of the population.
How many businesses are in ZIP code 20686?
ZIP code 20686 has 6 business establishments employing approximately 72 people, according to Census Bureau ZIP Code Business Patterns (ZBP) 2023 data.
What is the education level in ZIP code 20686?
In ZIP code 20686, 100.0% of residents aged 25+ have a high school diploma or higher, and 100.0% hold a bachelor's degree or higher. These figures come from the Census Bureau ACS 5-Year Estimates (2023).
Related
Take this with you
What to do with ZIP 20686's numbers, next.
- See how ZIP 20686 compares to a neighboring ZIP code on the same Census fields Compare this ZIP
- Check where Saint Marys City, MD ranks among every U.S. ZIP code on income, education, or homeownership View national rankings
- Save this ZIP to your shortlist to track alongside others you're considering View your shortlist
ZIP Code Tabulation Areas (ZCTAs) are Census Bureau approximations of USPS ZIP codes; figures describe the ZCTA area, not any single address within it.