20620 ZIP Code — Callaway, MD

Saint Marys County, Maryland

ZIP code 20620 is located in Callaway, Maryland, within Saint Marys County. It covers approximately 4.29 square miles and serves a population of 1,325 residents. This is a standard ZIP code in the Eastern (ET) timezone, served by area code 240/301.

About ZIP code 20620

The housing stock consists of predominantly single-family detached homes. Most homes were built in the 1990s, giving the area an established character. Median home value is $346,000. Owner-occupancy is high at 81%, well above the national average.

Median household income is $154,128. The poverty rate of 3% is below the national average.

The dominant occupation class is management, business, and professional, with public administration as the leading industry. The average commute of 24 minutes is near the national average.

Educational attainment is near the national average, with 28% of residents holding a bachelor's degree or higher.

Notable community characteristics include a notable veteran presence at 19% of civilians, above the national average of 7%; and disability rates above the national average at 22%.

Overall, ZIP code 20620 reflects a community defined by a strong veteran community and high homeownership.

1,325

population

4.29

sq mi land

Standard

ZIP type

Eastern (ET)

timezone

20620 ZIP code map

Cities in ZIP code 20620

Below are the cities the US Postal Service accepts for ZIP code 20620. Using any city not on this list may result in mail delivery delays.

City	Status
Callaway	Preferred

Nearby ZIP codes

20634 Great Mills (1.8 mi) 20692 Valley Lee (3.3 mi) 20619 California (4 mi) 20667 Park Hall (4.5 mi) 20653 Lexington Park (5.1 mi) 20690 Tall Timbers (5.1 mi) 20630 Drayden (5.3 mi) 20650 Leonardtown (6.4 mi) 20670 Patuxent River (6.8 mi) 20688 Solomons (7.4 mi) 20688 Solomons (7.4 mi) 20636 Hollywood (8.6 mi)

Demographics updated 05/2026

Population
Total population	1,325
Population density	309 / sq mi
State FIPS	24
County FIPS	037

Geography
Land area	4.29 sq mi
Water area	0.02 sq mi
Latitude	38.2314
Longitude	-76.5229
Timezone	Eastern (ET)
Area code	240/301

Total population by age

Gender

Race & ethnicity

Economics updated 05/2026

Household income

Income range	This ZIP	County avg	State avg
Under $50k	46.3%	24.3%	28.2%
$50k – $100k	4.9%	27.4%	28.2%
$100k – $200k	42.7%	36.2%	30.1%
Over $200k	6.1%	12.1%	13.4%

Demographics & statistics

1,325

Population

309

People per sq mi

46.8

Median age

$154,128

Median household income

$49,712

Per capita income

$346,000

Median home value

$1,400

Median monthly rent

81.3%

Home ownership

2.8%

Poverty rate

0.0%

Unemployment

461

Housing units

27.5%

Bachelor's or higher

Age distribution

Male Female

Under 5

5–9

10–14

15–19

20–24

171

25–34

147

35–44

144

45–54

124

142

55–59

122

60–64

65–74

75–84

85+

← Male

Female →

Age summary

Group	Count	%
Under 18	128	9.7%
18 and over	1,197	90.3%
65 and over	123	9.3%
Median age	46.8 years

Race & ethnicity

White 44.6%

Two or more races 24%

Hispanic or Latino 20.1%

Black or African American 8.6%

Asian 2.8%

Group	Count	%
White	739	44.6%
Two or more races	398	24%
Hispanic or Latino	333	20.1%
Black or African American	142	8.6%
Asian	46	2.8%

Household income

Income range	This ZIP	County avg	State avg
Under $50k	46.3%	24.3%	28.2%
$50k – $100k	4.9%	27.4%	28.2%
$100k – $200k	42.7%	36.2%	30.1%
Over $200k	6.1%	12.1%	13.4%

Under $10k 4.8%

$10k–$15k 1.5%

$15k–$25k 3.4%

$25k–$35k 13.2%

$50k–$75k 7.4%

$100k–$150k 13.9%

$150k–$200k 26.7%

$200k+ 29.2%

Range	% of households
Under $10k	4.8%
$10k–$15k	1.5%
$15k–$25k	3.4%
$25k–$35k	13.2%
$50k–$75k	7.4%
$100k–$150k	13.9%
$150k–$200k	26.7%
$200k+	29.2%
Median income	$154,128

Housing

Home values

$50k–$100k 4.1%

$150k–$200k 6.7%

$200k–$300k 27.1%

$300k–$500k 46.0%

$500k–$1M 16.0%

Housing overview

Metric	Value
Median home value	$346,000
Median rent / month	$1,400
Owner occupied	81.3%
Renter occupied	18.7%
Vacant	13.5%
Single-family detached	78.2%
Large apartment buildings	0.0%
Mobile homes	5.6%
Median rooms	6.6
Avg household size (owned)	2.99

Year built

Era	%
2020 or later	0.0%
2010–2019	1.6%
2000–2009	15.8%
1990–1999	42.5%
1980–1989	14.4%
1970–1979	13.1%
1960–1969	3.3%
1950–1959	9.3%
1940–1949	0.0%
1939 or earlier	0.0%

Bedrooms

Size	% of units
No bedroom (studio)	4.2%
1 bedroom	0.0%
2 bedrooms	9.3%
3 bedrooms	54.7%
4 bedrooms	31.8%
5+ bedrooms	0.0%

Vehicles per household

Vehicles	% of households
No vehicle	4.8%
1 vehicle	22.9%
2 vehicles	35.5%
3 or more	36.8%

Heating fuel

Fuel type	%
Electricity	80.0%
Propane / LP gas	8.6%
Fuel oil	7.6%
Solar	1.9%
No fuel used	1.9%

Households & families

Household type	Count	%
Married-couple family	298	62.6%
Cohabiting couple	45	9.5%
Male householder, no spouse	57	12.0%
Female householder, no spouse	76	16.0%
Households with children under 18	51	10.7%
Households with seniors (65+)	95	20.0%
Average household size	2.76

Marital status

Status	Male	Female
Never married	39.5%	8.7%
Married	47.8%	75.3%
Separated	0.0%	0.0%
Widowed	3.7%	3.9%
Divorced	9.0%	12.1%

Education

Less than 9th grade 0.7%

Some HS, no diploma 1.6%

HS graduate 28.7%

Some college, no degree 32.9%

Associate's degree 8.7%

Bachelor's degree 19.9%

Graduate / professional 7.6%

Metric	%
HS diploma or higher	97.7%
Bachelor's or higher	27.5%

School enrollment (ages 3–17)

Type	Count	%
Nursery / preschool	0	0.0%
Kindergarten	8	3.9%
Elementary school	82	40.0%
High school	33	16.1%
College / grad school	82	40.0%

Employment

Industry of employment

Public administration 37.2%

Professional & management 18.9%

Education & healthcare 13.5%

Construction 9.8%

Other services 9.4%

Retail trade 6.6%

Finance & real estate 3.1%

Information 1.4%

Occupation

Category	%
Management, business & arts	61.4%
Service	17.1%
Sales & office	16.3%
Natural resources & construction	5.2%
Production & transportation	0.0%

Employment type

Type	%
Private sector	52.6%
Government	39.5%
Self-employed	7.9%
Unpaid family workers	0.0%

Commute

Method	%
Drive alone	77.6%
Carpool	3.8%
Public transit	4.0%
Walk	2.6%
Work from home	12.1%
Other means	0.0%
Avg commute (minutes)	24.0

Poverty

All people 2.8%

Under 18 years 0.0%

18 and over 3.1%

Married-couple families 0.0%

Female-led households 38.9%

Income support

Source	% of households
Social Security	20.0%
Retirement income	52.3%
Supplemental Security	3.2%
Cash public assistance	0.0%
Food stamps / SNAP	3.6%

Health indicators

Condition	%
Obesity	36.5%
High blood pressure	32.5%
High cholesterol	32.5%
Diabetes	9.2%
Heart disease	4.8%
Stroke	2.4%
Asthma	9.9%
Arthritis	22.9%
Kidney disease	2.3%
Pulmonary disease	5.0%
Cancer	5.6%

Behavior / access	%
Smoking	15.6%
Binge drinking	16.0%
No physical activity	20.2%
Less than 7 hrs sleep	36.1%
Depression	16.9%
Fair or poor health	10.6%
Poor mental health	13.9%
Poor physical health	7.7%
No health insurance	9.3%
Visited doctor (checkup)	76.1%
Visited dentist	69.6%
Cholesterol screening	91.7%
Teeth loss	10.6%

Veterans & disability

Veterans	Count	%
Civilian veterans	225	19.1%

Disability	%
Any disability	22.2%
Under 18	0.0%
18–64 years	24.1%
65 and over	29.5%

Health insurance coverage

Type	%
Private insurance	88.4%
Public insurance	20.8%
No insurance	0.0%
Uninsured under 19	0.0%

Language & origin

Language spoken at home (age 5+)

Language	Count	%
English only	1,301	98.2%
Spanish	0	0.0%
Other Indo-European	0	0.0%
Asian & Pacific Islander	0	0.0%
Other languages	0	0.0%

Place of birth & citizenship

Origin	Count	%
Native born (US)	1,247	94.1%
Born in same state	1,247	94.1%
Born in different state	291	22.0%
Foreign born	0	0.0%
Naturalized citizen	78	5.9%
Not a US citizen	21	26.9%

Ancestry

Ancestry	Count	%
Italian	272	20.5%
Arab	199	15%
French	74	5.6%

Ancestry	Count	%
English	11	0.8%
German	9	0.7%

Technology access

Metric	% of households
Computer access	35.9%
Internet access	93.5%

Source: U.S. Census Bureau, American Community Survey 2025 estimates.

Frequently asked questions about ZIP code 20620

What city is ZIP code 20620 in?

ZIP code 20620 is primarily assigned to Callaway, Maryland.

What county is ZIP code 20620 in?

ZIP code 20620 falls within Saint Marys County, Maryland.

Does ZIP code 20620 have a large veteran population?

19% of civilians in ZIP code 20620 are veterans, above the national average of ~7%.

Is ZIP code 20620 mostly owner-occupied?

81% of occupied units in ZIP code 20620 are owner-occupied, well above the national average.

What is the median household income in ZIP code 20620?

The median household income in ZIP code 20620 is $154,128, above the national median of ~$75,000.

What is the typical home value in ZIP code 20620?

The median home value in ZIP code 20620 is $346,000.

What timezone is ZIP code 20620 in?

ZIP code 20620 observes the EST timezone.