Residential delivery area · Maryland
ZIP Code 20680: Ridge, MD
ZIP code 20680 uses the postal name Ridge, Maryland and lies entirely in St. Mary's County (Census 2020 ZIP-county file). About 660 people live there (Census Bureau, ACS 2020-2024). Its land lies outside any incorporated or census-designated place.
- ACS2020-24
- Census2020
- FHFA2021
- ZBP2023
- IRS2022
- Town
- Ridge · 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
- 7.9 sq mi · 84 people per sq mi
Where is ZIP code 20680?
20680 centers on 38.109°, -76.386° and covers 7.9 square miles of land plus 1.6 of water. It borders 3 ZIP codes: 20684, 20628, 20687.
The map draws ZIP code areas only. For the streets inside 20680, 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 20680 compare with the rest of St. Mary's County?
| Measure | 20680 | In St. Mary's County | In MD |
|---|---|---|---|
| People (ACS 2020-2024) | 663 | 18th of 27 | 378th of 477 |
| Median household income | – | not ranked | not ranked |
| Median home value | $398k | not ranked | not ranked |
20680's income and home value are not ranked: it has fewer than 1,000 residents (663). 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 51% 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 20680?
The 2020 Census counted 944 people in 20680; the ACS, which samples households over 2020-2024, estimates 663. Its boundary changed between the 2010 and 2020 censuses, so the two counts are not compared.
- People, ACS 2020-2024
- 663±360 (90% margin)
- 2020 Census count
- 944
- Households
- 288
- Median age
- 33.6
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 20680?
Of the 663 people the ACS estimates in 20680, 36.7% are under 18 and 23.8% are 65 or older. The largest group by race and Hispanic origin is White (not Hispanic) (70.9%), then Other or two or more (23.1%).
- Under 1836.7%
- 18 to 6439.5%
- 65 and older23.8%
- White, not Hispanic70.9%
- Other or two or more23.1%
- Black, not Hispanic6.0%
- Hispanic or Latino0.0%
- 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 are homes worth in 20680?
- Median home value (owners' estimate)
- $397,500
- Median gross rent
- $1,592
- Homes owned by their occupants
- 39.9%
- Housing units
- 288
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 20680?
17 business establishments had a location in this ZIP code in 2023, 1 fewer than in 2018; the most are in accommodation and food services (ZIP Code Business Patterns).
- Accommodation and food services4
- Retail trade3
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 20680?
| ZIP | Town | People | Household income | Distance |
|---|---|---|---|---|
| 20684 | Saint Inigoes | 802 | $180k | 2.2 mi |
| 20628 | Dameron | 503 | – | 3.9 mi |
| 20687 | Scotland | 415 | – | 4.0 mi |
| 20630 | Drayden | 559 | $233k | 5.5 mi (near) |
| 20686 | Saint Marys City | 971 | – | 6.0 mi (near) |
| 20692 | Valley Lee | 505 | $201k | 7.9 mi (near) |
| 20667 | Park Hall | 150 | – | 8.1 mi (near) |
| 20674 | Piney Point | 769 | $172k | 8.5 mi (near) |
Source: PlainZIP from the Census 2020 ZCTA boundaries (shared edges) and internal points; figures ACS 2020-2024.