Residential delivery area · Maryland
ZIP Code 20684: Saint Inigoes, MD
ZIP code 20684 uses the postal name Saint Inigoes, Maryland and lies entirely in St. Mary's County (Census 2020 ZIP-county file). About 800 people live there (Census Bureau, ACS 2020-2024). Median household income is $180,060 (Census Bureau, ACS 2020-2024). Its land lies outside any incorporated or census-designated place.
- ACS2020-24
- Census2020
- FHFA2024
- ZBP2023
- IRS2022
- Town
- Saint Inigoes · its only residential ZIP
- County
- St. Mary's County
- Metro area
- Lexington Park, MD
- House district
- MD-5 119th Congress
- State
- Maryland
- Time zone
- Eastern
- Land area
- 8.3 sq mi · 96 people per sq mi
Where is ZIP code 20684?
20684 centers on 38.125°, -76.421° and covers 8.3 square miles of land plus 3.4 of water. It borders 3 ZIP codes: 20680, 20628, 20653.
The map draws ZIP code areas only. For the streets inside 20684, open its center on OpenStreetMap.
Source: U.S. Census Bureau, 2020 ZCTA cartographic boundaries and the 2023 Gazetteer (2020 ZCTAs); ZIP-to-county shares, Census places and House districts (119th Congress) from the Census 2020 relationship files (shares of land); metro area from the OMB delineation (July 2023); town name and time zone from simplemaps US ZIP Codes (CC BY 4.0).
How does 20684 compare with the rest of St. Mary's County?
| Measure | 20684 | In St. Mary's County | In MD |
|---|---|---|---|
| People (ACS 2020-2024) | 802 | 14th of 27 | 364th of 477 |
| Median household income | $180k | not ranked | not ranked |
| Median home value | $361k | not ranked | not ranked |
20684's income and home value are not ranked: it has fewer than 1,000 residents (802). Rankings use ZIP codes of 1,000 or more people living in households, with margins at most 25% of the figure.
It is denser than 53% of U.S. residential ZIP codes. ZIP codes at the ACS caps ($250,000 or more for household income, $2,000,000 or more for home value) share the top rank.
Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates (B01003, B19013, B25077); ranks by PlainZIP over residential ZIP codes (ZCTAs).
How many people live in 20684?
The 2020 Census counted 1,193 people in 20684; the ACS, which samples households over 2020-2024, estimates 802. Between the 2010 and 2020 censuses its population grew 6.0% (its boundary stayed at least 90% the same).
- People, ACS 2020-2024
- 802±404 (90% margin)
- 2020 Census count
- 1,193+6.0% since 2010 (1,125)
- Households
- 357
- Median age
- 44.2
Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates (B01003, B01002, B11001); 2020 Census (DHC P1); 2010 Census (SF1 P1).
Who lives in 20684?
Of the 802 people the ACS estimates in 20684, 14.3% are under 18 and 20.6% are 65 or older. The largest group by race and Hispanic origin is White (not Hispanic) (86.8%), then Other or two or more (12.0%).
- Under 1814.3%
- 18 to 6465.1%
- 65 and older20.6%
- White, not Hispanic86.8%
- Other or two or more12.0%
- Black, not Hispanic1.1%
- Hispanic or Latino0.1%
- Asian, not Hispanic0.0%
Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates (B01001 age by sex, B03002 Hispanic or Latino origin by race); shares of the estimated population, small ZIP codes carry wide margins.
What do households in 20684 earn?
Median household income is $180,060 (ACS 2020-2024). It is not measurably different from 2015-2019 ($131,901 in 2024 dollars): the change is within the surveys' margins of error.
- Median household income
- $180,060±$52,797
- Income per person
- $71,244
- Below the poverty line
- 1.1%
- Unemployed (of the labor force)
- 0.0%
- Adults 25+ with a bachelor's degree
- 49.7%
- Adjusted gross income per tax return, 2022
- $99,880560 returns; wages 71% of AGI (IRS)
Source: U.S. Census Bureau, ACS 2020-2024 and 2015-2019 5-year estimates (B19013, B19301, B17001, B23025, B15003; 2015-2019 dollars converted with the BLS CPI-U, 1.22699); IRS Statistics of Income, ZIP code data, tax year 2022 (adjusted gross income per return, filed under the address on the return).
What are homes worth in 20684?
- Median home value (owners' estimate)
- $360,500
- Median gross rent
- –
- Homes owned by their occupants
- 93.0%
- Housing units
- 357
Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates (B25077, B25064, B25003, B25001); FHFA House Price Index, annual five-digit ZIP, updated 2026-03-31.
What businesses are in 20684?
20 business establishments had a location in this ZIP code in 2023, 4 fewer than in 2018; the most are in professional, scientific, and technical services (ZIP Code Business Patterns).
- Professional, scientific, and technical services13
Source: U.S. Census Bureau, ZIP Code Business Patterns 2023 and 2018 (establishments with paid employees, by the business's ZIP code).
Which ZIP codes are next to 20684?
| ZIP | Town | People | Household income | Distance |
|---|---|---|---|---|
| 20680 | Ridge | 663 | – | 2.2 mi |
| 20628 | Dameron | 503 | – | 4.8 mi |
| 20653 | Lexington Park | 26,852 | $103k | 7.7 mi |
| 20630 | Drayden | 559 | $233k | 3.3 mi (near) |
| 20686 | Saint Marys City | 971 | – | 4.3 mi (near) |
| 20692 | Valley Lee | 505 | $201k | 5.7 mi (near) |
| 20687 | Scotland | 415 | – | 6.1 mi (near) |
| 20667 | Park Hall | 150 | – | 6.4 mi (near) |
| 20674 | Piney Point | 769 | $172k | 6.4 mi (near) |
Source: PlainZIP from the Census 2020 ZCTA boundaries (shared edges) and internal points; figures ACS 2020-2024.