Callaway, MD · standard
ZIP Code 20620
St. Mary's County, Maryland - Census ACS demographics, housing tenure, and business patterns, benchmarked against every US ZIP.
- 1,443
- 144/sq mi High-density area
- $165,972
- Median income Above-median income area
- $391,300
- Median home value Above-median home value
- 24.9%
- Bachelor's or higher Near-average bachelor's attainment
National ZIP placement
Callaway pairs a top-decile household income with upper-quartile home values, in a rural, homeowner-dominated area.
- Top 2%
- household income, US ZIPs
- Top 21%
- home value, US ZIPs
- 144
- people per sq mi
- 96%
- owner-occupied homes
Source: U.S. Census Bureau ACS 5-Year Estimates (2019–2023). Percentiles rank ZIP 20620 against every reporting US ZIP.
ZIP code 20620 is a sparsely populated ZIP (a standard USPS delivery area) in Callaway, St. Mary's County, Maryland, home to just 1,443 residents across 10.0 square miles, a density of 144 people per square mile, in the New York time zone.
ZIP 20620 skews affluent, with a median household income of $165,972 (45% above the average Maryland ZIP), while per-capita income is $57,323. Both reported hardship measures are comparatively low in absolute terms: poverty is 4.9% and unemployment is 0.0%. Median home value is $391,300 (13% below the average Maryland ZIP); 96.4% of occupied homes are owner-occupied.
Educational attainment sits below the national norm: 24.9% of adults hold a bachelor's degree or higher, the median age is 41.6, 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 20620 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 →
Top industries in ZIP 20620
Top 5 sectors by establishment count in Callaway, MD
Which industries have the most business establishments in ZIP 20620.
- Retail trade
Retail trade
9 establishments
- Accommodation and food services
Accommodation and food services
6 establishments
- Other services (except public administration)
Other services (except public administration)
5 establishments
- Construction 3
Construction
3 establishments
- Transportation and warehousing 3
Transportation and warehousing
3 establishments
What this shows Establishment counts come from the Census ZIP Code Business Patterns program, which counts physical business locations rather than employees or revenue.
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 20620, Callaway, 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
1,443
Population
10.0
Area (sq mi)
144
People / sq mi
New York
Time Zone
standard
ZIP Type
Who lives in ZIP 20620?
41.6
Median Age
51.6%
Male
48.4%
Female
4.7%
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?
$165,972
Median Household Income
+45% vs state ZIP avg
$57,323
Per Capita Income
4.9%
Poverty Rate
0.0%
Unemployment Rate
How ZIP 20620 ranks among Maryland ZIPs
Callaway, 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)
$165,972 Top 12% higher than 88% 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
456housing units
456
Total Housing Units
389
Occupied Units
67
Vacant Units
2.86
Avg Household Size
Occupancy Type
$391,300
Median Home Value
-13% vs state ZIP avg
1990
Median Year Built
Source: U.S. Census Bureau, ACS 5-Year Estimates (2023)
How have home values changed over time?
FHFA House Price Index, annual appreciation data based on repeat sales and appraisals
+5.2%
YoY Change (2021)
205
HPI Index (2000 = 100)
+105%
Total Change Since 2000
Home values in ZIP 20620 have increased 5.2% over the past year (2021). Since 2000, this ZIP has seen +105% cumulative appreciation.
| Year | Annual Change | HPI Index |
|---|---|---|
| 2017 | -3.3% | 171 |
| 2018 | +7.0% | 183 |
| 2019 | +9.0% | 199 |
| 2020 | -2.1% | 195 |
| 2021 | +5.2% | 205 |
Source: Federal Housing Finance Agency (FHFA) House Price Index, All-Transactions, Five-Digit ZIP Codes (Developmental Index). Index base = 100 in year 2000. Data through 2021. ZIP codes with few transactions may show missing values.
What businesses operate in this ZIP?
Census Bureau data shows 36 business establishments in ZIP 20620, employing approximately 452 people with a combined annual payroll of $17,345,000.
36
Businesses
452
Employees
$17.3M
Annual Payroll
5
Industry Sectors
| Industry | Establishments | % of Total |
|---|---|---|
| Retail trade | 9 | 25.0% |
| Accommodation and food services | 6 | 16.7% |
| Other services (except public administration) | 5 | 13.9% |
| Construction | 3 | 8.3% |
| Transportation and warehousing | 3 | 8.3% |
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 20620 vs 20634 →
ZIP 20620 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
- 20650
Leonardtown (20650)
13,717 residents
- 20619
California (20619)
10,503 residents
- 20634 5,927
Great Mills (20634)
5,927 residents
- 20620 1,443
Callaway (20620)
1,443 residents
- 20686 1,332
Saint Marys City (20686)
1,332 residents
- 20692 1,051
Valley Lee (20692)
1,051 residents
- 20674 830
Piney Point (20674)
830 residents
- 20690 740
Tall Timbers (20690)
740 residents
What this shows Among its immediate neighbors, ZIP 20620 ranks #5 by population - useful context the national average alone can't give.
ZIP 20620 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
- 20674
Piney Point (20674)
$171,985 median income
- 20620
Callaway (20620)
$165,972 median income
- 20650
Leonardtown (20650)
$143,116 median income
- 20634
Great Mills (20634)
$139,375 median income
- 20690
Tall Timbers (20690)
$122,750 median income
- 20619
California (20619)
$119,432 median income
- 20653
Lexington Park (20653)
$103,048 median income
What this shows By household income, ZIP 20620 ranks #4 of 9 neighboring ZIPs, local affluence varies block to block, not just metro to metro.
| ZIP Code | City | Population | Distance |
|---|---|---|---|
| 20634 | Great Mills, MD | 5,927 | 1.7 mi |
| 20619 | California, MD | 10,503 | 4.1 mi |
| 20692 | Valley Lee, MD | 1,051 | 3.5 mi |
| 20690 | Tall Timbers, MD | 740 | 4.8 mi |
| 20653 | Lexington Park, MD | 24,481 | 4.9 mi |
| 20667 | Park Hall, MD | 494 | 4.5 mi |
| 20674 | Piney Point, MD | 830 | 6.8 mi |
| 20630 | Drayden, MD | 348 | 5.5 mi |
| 20686 | Saint Marys City, MD | 1,332 | 6.2 mi |
| 20650 | Leonardtown, MD | 13,717 | 6.7 mi |
Nationwide ZIPs with similar ACS profiles
Two Census-derived peer sets for ZIP 20620, 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 (1,443 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 20620 in?
ZIP code 20620 (Callaway) 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 20620?
ZIP code 20620 in Callaway, MD has a population of 1,443 according to the Census Bureau ACS 2023 estimates.
What is the median household income in ZIP 20620?
The median household income in ZIP 20620 is $165,972, which is 118% above the national average of $76,288.
What is the average home value in ZIP 20620?
The median home value in ZIP 20620 is $391,300, which is 41% above the national average of $278,155.
What is the demographic makeup of ZIP 20620?
The largest racial group in ZIP 20620 is White at 64.4%. Hispanic or Latino residents make up 28.9% of the population.
How many businesses are in ZIP code 20620?
ZIP code 20620 has 36 business establishments employing approximately 452 people, according to Census Bureau ZIP Code Business Patterns (ZBP) 2023 data.
What are the main industries in ZIP code 20620?
The top industries by establishment count in ZIP 20620 are: Retail trade (9), Accommodation and food services (6), Other services (except public administration) (5). There are 5 industry sectors represented in total.
How have home values changed in ZIP code 20620?
According to the FHFA House Price Index, home values in ZIP 20620 increased by 5.2% in 2021. Since 2000, home values in this ZIP have appreciated by approximately 105%. This is a developmental index based on repeat sales and appraisal data from Fannie Mae and Freddie Mac.
What is the education level in ZIP code 20620?
In ZIP code 20620, 53.4% of residents aged 25+ have a high school diploma or higher, and 24.9% 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 20620?
In ZIP code 20620, approximately 96.4% of occupied housing units are owner-occupied and 3.6% are renter-occupied, based on Census ACS 2023 data.
What is the poverty rate in ZIP code 20620?
The poverty rate in ZIP code 20620 is 4.9% 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 20620's numbers, next.
- See how ZIP 20620 compares to a neighboring ZIP code on the same Census fields Compare this ZIP
- Check where Callaway, 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.