Residential delivery area · Maryland
ZIP Code 20620: Callaway, MD
ZIP code 20620 is in Callaway, Maryland, entirely in St. Mary's County (Census 2020 ZIP-county file). About 1,100 people live there (Census Bureau, ACS 2020-2024). Median household income is $165,972 (Census Bureau, ACS 2020-2024). By Census place, 92% of its land lies in Callaway (a census-designated place); 8% is outside any Census place.
- ACS2020-24
- Census2020
- FHFA2021
- ZBP2023
- IRS2022
- Town
- Callaway · its only residential ZIP
- County
- St. Mary's County
- Census places
- Callaway census-designated place
- Metro area
- Lexington Park, MD
- House district
- MD-5 119th Congress
- State
- Maryland
- Time zone
- Eastern
- Land area
- 4.3 sq mi · 260 people per sq mi
Where is ZIP code 20620?
20620 centers on 38.233°, -76.522° and covers 4.3 square miles of land plus 0.0 of water. It borders 4 ZIP codes: 20634, 20692, 20619, 20650.
The map draws ZIP code areas only. For the streets inside 20620, 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 20620 compare with the rest of St. Mary's County?
| Measure | 20620 | In St. Mary's County | In MD |
|---|---|---|---|
| People (ACS 2020-2024) | 1,115 | 10th of 27 | 344th of 477 |
| Median household income | $166k | 1st of 8 | 32nd of 293 |
| Median home value | $391k | 5th of 9 | 187th of 320 |
Its median household income is higher than in 98% of U.S. residential ZIP codes, and it is denser than 65% of all 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 20620?
The 2020 Census counted 1,588 people in 20620; the ACS, which samples households over 2020-2024, estimates 1,115. Its boundary changed between the 2010 and 2020 censuses, so the two counts are not compared.
- People, ACS 2020-2024
- 1,115±484 (90% margin)
- 2020 Census count
- 1,588
- Households
- 389
- Median age
- 41.6
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 20620?
Of the 1,115 people the ACS estimates in 20620, 6.3% are under 18 and 3.1% are 65 or older. The largest group by race and Hispanic origin is White (not Hispanic) (64.4%), then Hispanic or Latino (28.9%).
- Under 186.3%
- 18 to 6490.6%
- 65 and older3.1%
- White, not Hispanic64.4%
- Hispanic or Latino28.9%
- Black, not Hispanic3.8%
- Other or two or more3.0%
- 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 do households in 20620 earn?
Median household income is $165,972 (ACS 2020-2024), the highest of the 8 ranked ZIP codes in St. Mary's County.
- Median household income
- $165,972±$25,868
- Income per person
- $57,323
- Below the poverty line
- 4.9%
- Unemployed (of the labor force)
- 0.0%
- Adults 25+ with a bachelor's degree
- 24.9%
- Adjusted gross income per tax return, 2022
- $89,019770 returns; wages 77% 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 20620?
- Median home value (owners' estimate)
- $391,300
- Median gross rent
- –
- Homes owned by their occupants
- 96.4%
- Housing units
- 456
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 20620?
36 business establishments had a location in this ZIP code in 2023, 2 more than in 2018; the most are in retail trade (ZIP Code Business Patterns).
- Retail trade9
- Accommodation and food services6
- Other services (except public administration)5
- Construction3
- Transportation and warehousing3
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 20620?
| ZIP | Town | People | Household income | Distance |
|---|---|---|---|---|
| 20634 | Great Mills | 7,088 | $139k | 1.4 mi |
| 20692 | Valley Lee | 505 | $201k | 3.8 mi |
| 20619 | California | 14,212 | $119k | 4.1 mi |
| 20650 | Leonardtown | 16,094 | $143k | 6.3 mi |
| 20667 | Park Hall | 150 | – | 4.2 mi (near) |
| 20653 | Lexington Park | 26,852 | $103k | 5.1 mi (near) |
| 20690 | Tall Timbers | 1,077 | $123k | 5.2 mi (near) |
| 20686 | Saint Marys City | 971 | – | 5.8 mi (near) |
| 20630 | Drayden | 559 | $233k | 6.0 mi (near) |
Source: PlainZIP from the Census 2020 ZCTA boundaries (shared edges) and internal points; figures ACS 2020-2024.