Saint Inigoes, MD · standard
ZIP Code 20684
St. Mary's County, Maryland - Census ACS demographics, housing tenure, and business patterns, benchmarked against every US ZIP.
- 1,125
- 48/sq mi Moderate-density area
- $180,060
- Median income Above-median income area
- $360,500
- Median home value Above-median home value
- 49.7%
- Bachelor's or higher Above-average bachelor's attainment
National ZIP placement
Saint Inigoes pairs a top-decile household income with upper-quartile home values, in a rural, homeowner-dominated area.
- Top 2%
- household income, US ZIPs
- Top 25%
- home value, US ZIPs
- 48
- people per sq mi
- 93%
- owner-occupied homes
Source: U.S. Census Bureau ACS 5-Year Estimates (2019–2023). Percentiles rank ZIP 20684 against every reporting US ZIP.
ZIP code 20684 is a sparsely populated ZIP (a standard USPS delivery area) in Saint Inigoes, St. Mary's County, Maryland, home to just 1,125 residents across 23.7 square miles, a density of 48 people per square mile, in the New York time zone.
ZIP 20684 skews affluent, with a median household income of $180,060 (58% above the average Maryland ZIP), while per-capita income is $71,244. Both reported hardship measures are comparatively low in absolute terms: poverty is 1.1% and unemployment is 0.0%. Home values sit below the statewide ZIP benchmark: the median is $360,500 (19% below the average Maryland ZIP); owner occupancy is 93.0%.
A solid share of residents have a four-year degree: 49.7% of adults hold a bachelor's degree or higher, the median age is 44.2, 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 20684 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 20684, Saint Inigoes, 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
1,125
Population
23.7
Area (sq mi)
48
People / sq mi
New York
Time Zone
standard
ZIP Type
Who lives in ZIP 20684?
44.2
Median Age
38.0%
Male
62.0%
Female
2.2%
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?
$180,060
Median Household Income
+58% vs state ZIP avg
$71,244
Per Capita Income
1.1%
Poverty Rate
0.0%
Unemployment Rate
How ZIP 20684 ranks among Maryland ZIPs
Saint Inigoes, MD household income vs. every Maryland ZIP code
Median household income among 419 reporting Maryland ZIPs (this ZIP's population is too small for a reliable national-corpus placement)
$180,060 Top 9% higher than 91% of 419 Maryland ZIPs
Each bar is a $20K-wide band; taller bars hold more Maryland ZIPs. The dashed line + filled bar mark this entry. Hover or tap any bar for its full count, share, and where it sits relative to this entry.
Source U.S. Census Bureau, ACS 5-Year Estimates · 2019–2023
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?
Housing stock: occupied vs vacant
357housing units
357
Total Housing Units
357
Occupied Units
0
Vacant Units
2.24
Avg Household Size
Occupancy Type
$360,500
Median Home Value
-19% vs state ZIP avg
1998
Median Year Built
Source: U.S. Census Bureau, ACS 5-Year Estimates (2023)
What businesses operate in this ZIP?
Census Bureau data shows 20 business establishments in ZIP 20684, employing approximately 551 people with a combined annual payroll of $44,032,000.
20
Businesses
551
Employees
$44.0M
Annual Payroll
1
Industry Sectors
| Industry | Establishments | % of Total |
|---|---|---|
| Professional, scientific, and technical services | 13 | 65.0% |
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 20684 vs 20686 →
ZIP 20684 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
- 20674 830
Piney Point (20674)
830 residents
- 20690 740
Tall Timbers (20690)
740 residents
- 20628 594
Dameron (20628)
594 residents
- 20667 494
Park Hall (20667)
494 residents
What this shows Among its immediate neighbors, ZIP 20684 ranks #3 by population - useful context the national average alone can't give.
ZIP 20684 vs its nearest neighbors, by median income
Median household income of this ZIP and the closest reporting ZIP codes within ~10 miles.
- 20630
Drayden (20630)
$233,411 median income
- 20692
Valley Lee (20692)
$201,250 median income
- 20684
Saint Inigoes (20684)
$180,060 median income
- 20674
Piney Point (20674)
$171,985 median income
- 20690
Tall Timbers (20690)
$122,750 median income
- 20653
Lexington Park (20653)
$103,048 median income
What this shows By household income, ZIP 20684 ranks #3 of 6 neighboring ZIPs, local affluence varies block to block, not just metro to metro.
| ZIP Code | City | Population | Distance |
|---|---|---|---|
| 20686 | Saint Marys City, MD | 1,332 | 2.8 mi |
| 20628 | Dameron, MD | 594 | 3.1 mi |
| 20680 | Ridge, MD | 1,119 | 2.8 mi |
| 20630 | Drayden, MD | 348 | 3.8 mi |
| 20674 | Piney Point, MD | 830 | 5.1 mi |
| 20667 | Park Hall, MD | 494 | 5.5 mi |
| 20653 | Lexington Park, MD | 24,481 | 6.2 mi |
| 20687 | Scotland, MD | 313 | 5.6 mi |
| 20692 | Valley Lee, MD | 1,051 | 5.8 mi |
| 20690 | Tall Timbers, MD | 740 | 6.7 mi |
Nationwide ZIPs with similar ACS profiles
Two Census-derived peer sets for ZIP 20684, 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 (1,125 here; floor ≥1,000).
Similar median household income
Nearest cross-state ZIPs by ACS median household income.
More ZIP Codes in St. Mary's County
Related Areas
Frequently Asked Questions
What county is ZIP code 20684 in?
ZIP code 20684 (Saint Inigoes) 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 20684?
ZIP code 20684 in Saint Inigoes, MD has a population of 1,125 according to the Census Bureau ACS 2023 estimates.
What is the median household income in ZIP 20684?
The median household income in ZIP 20684 is $180,060, which is 136% above the national average of $76,288.
What is the average home value in ZIP 20684?
The median home value in ZIP 20684 is $360,500, which is 30% above the national average of $278,155.
What is the demographic makeup of ZIP 20684?
The largest racial group in ZIP 20684 is White at 86.8%. Hispanic or Latino residents make up 0.1% of the population.
How many businesses are in ZIP code 20684?
ZIP code 20684 has 20 business establishments employing approximately 551 people, according to Census Bureau ZIP Code Business Patterns (ZBP) 2023 data.
What is the education level in ZIP code 20684?
In ZIP code 20684, 90.0% of residents aged 25+ have a high school diploma or higher, and 49.7% hold a bachelor's degree or higher. These figures come from the Census Bureau ACS 5-Year Estimates (2023).
What percentage of residents own vs. rent in ZIP 20684?
In ZIP code 20684, approximately 93.0% of occupied housing units are owner-occupied and 7.0% are renter-occupied, based on Census ACS 2023 data.
What is the poverty rate in ZIP code 20684?
The poverty rate in ZIP code 20684 is 1.1% according to Census Bureau ACS 2023 estimates. This measures the percentage of the population living below the federal poverty threshold.
Related
Take this with you
What to do with ZIP 20684's numbers, next.
- See how ZIP 20684 compares to a neighboring ZIP code on the same Census fields Compare this ZIP
- Check where Saint Inigoes, 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.