Residential delivery area · Maryland
ZIP Code 20621: Chaptico, MD
ZIP code 20621 uses the postal name Chaptico, Maryland and lies entirely in St. Mary's County (Census 2020 ZIP-county file). About 960 people live there (Census Bureau, ACS 2020-2024). Its land lies outside any incorporated or census-designated place.
- ACS2020-24
- Census2020
- FHFA2022
- ZBP2023
- IRS2022
- Town
- Chaptico · 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
- 13.9 sq mi · 69 people per sq mi
Where is ZIP code 20621?
20621 centers on 38.326°, -76.801° and covers 13.9 square miles of land plus 0.1 of water. It borders 4 ZIP codes: 20618, 20624, 20609, 20659.
The map draws ZIP code areas only. For the streets inside 20621, 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 20621 compare with the rest of St. Mary's County?
| Measure | 20621 | In St. Mary's County | In MD |
|---|---|---|---|
| People (ACS 2020-2024) | 958 | 13th of 27 | 352nd of 477 |
| Median household income | – | not ranked | not ranked |
| Median home value | $481k | not ranked | not ranked |
20621's income and home value are not ranked: it has fewer than 1,000 residents (958). 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 48% 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 20621?
The 2020 Census counted 1,214 people in 20621; the ACS, which samples households over 2020-2024, estimates 958. Its boundary changed between the 2010 and 2020 censuses, so the two counts are not compared.
- People, ACS 2020-2024
- 958±345 (90% margin)
- 2020 Census count
- 1,214
- Households
- 534
- Median age
- 63.0
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 20621?
Of the 958 people the ACS estimates in 20621, 14.6% are under 18 and 24.1% are 65 or older. The largest group by race and Hispanic origin is White (not Hispanic) (77.0%), then Black (not Hispanic) (23.0%).
- Under 1814.6%
- 18 to 6461.3%
- 65 and older24.1%
- White, not Hispanic77.0%
- Black, not Hispanic23.0%
- Hispanic or Latino0.0%
- Asian, not Hispanic0.0%
- Other or two or more0.0%
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 are homes worth in 20621?
- Median home value (owners' estimate)
- $481,100
- Median gross rent
- –
- Homes owned by their occupants
- 100.0%
- Housing units
- 611
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 20621?
14 business establishments had a location in this ZIP code in 2023, 1 fewer than in 2018; the most are in construction (ZIP Code Business Patterns).
- Construction4
- Other services (except public administration)3
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 20621?
| ZIP | Town | People | Household income | Distance |
|---|---|---|---|---|
| 20618 | Bushwood | 1,705 | $106k | 3.5 mi |
| 20624 | Clements | 796 | $105k | 3.8 mi |
| 20609 | Avenue | 714 | $118k | 4.2 mi |
| 20659 | Mechanicsville | 24,324 | $122k | 6.8 mi |
| 20661 | Mount Victoria | 0 | – | 5.0 mi (near) |
| 20625 | Cobb Island | 849 | – | 5.3 mi (near) |
| 20606 | Abell | 291 | $88k | 5.7 mi (near) |
| 20660 | Morganza | 14 | – | 5.9 mi (near) |
| 20664 | Newburg | 3,138 | $88k | 6.0 mi (near) |
Source: PlainZIP from the Census 2020 ZCTA boundaries (shared edges) and internal points; figures ACS 2020-2024.