Preston ZIP Codes — Caroline County, MD

There is one unique ZIP code in Preston, Maryland and it is 21655. Area code: 410.

ZIP codes

52.72

sq mi land

3.34

sq mi water

410

area code

Preston, MD ZIP code map

About Preston, MD

Preston is a quaint town located in Caroline County, Maryland. Known for its serene rural atmosphere, this small community offers a blend of natural beauty and local charm. With a single ZIP code, 21655, Preston has a unique identity that reflects its tight-knit community spirit.

Location & geography

Geographically, Preston covers a land area of 52.72 square miles and is bordered by beautiful waterways, as it includes 3.34 square miles of water area. It is situated approximately 17 miles south of Dover, Delaware and around 18 miles northwest of Easton, Maryland. The town is accessed via major roadways, enhancing its connectivity to neighboring cities and regions.

Community & economy

The community in Preston is characterized by its friendly residents who enjoy a tranquil lifestyle. The local economy is primarily driven by agriculture, reflecting the town's rural roots, with many residents engaged in farming and related industries. Daily life in Preston is marked by a close connection to nature and a strong sense of community, which is showcased in local events and gatherings.

Transportation

Preston is conveniently accessible via Maryland State Routes, including Route 331. The nearest major airports are Easton Airport, located about 20 miles away, and Salisbury-Ocean City Wicomico Regional Airport, approximately 35 miles from the town.

History

Preston was established in the early 19th century and has a rich agricultural history, with farming playing a central role in its development. The town's location along natural waterways has historically supported transportation and trade, contributing to its growth. Over the years, Preston has maintained its rural charm while adapting to the changing landscape of Caroline County.

Did you know?

One surprising fact about Preston is that it is home to a vibrant local arts community that often organizes events and exhibitions. Additionally, the town's historic buildings, some dating back to the 1800s, reflect its long-standing heritage and contribute to the unique character of the area.

ZIP codes for Preston, MD (1)

ZIP code	City	County	Map
21655	Preston	Caroline	View map

Demographics & statistics

4,753

Population

42.7

Median age

$78,000

Median household income

$43,059

Per capita income

$266,100

Median home value

$1,215

Median monthly rent

81.2%

Home ownership

8.5%

Poverty rate

3.6%

Unemployment

1,720

Housing units

21.5%

Bachelor's or higher

Age distribution

Male Female

Under 5

182

5–9

189

144

10–14

148

114

15–19

118

142

20–24

146

242

25–34

251

349

35–44

360

288

45–54

298

221

55–59

228

186

60–64

193

219

65–74

226

115

75–84

118

85+

← Male

Female →

Age summary

Group	Count	%
Under 18	1,027	21.6%
18 and over	3,726	78.4%
65 and over	773	16.3%
Median age	42.7 years

Race & ethnicity

White 77.1%

Black or African American 8.4%

Hispanic or Latino 5.8%

Two or more races 5.3%

Other race 2.8%

Asian 0.4%

American Indian / Alaska Native 0.1%

Group	Count	%
White	3,891	77.1%
Black or African American	422	8.4%
Hispanic or Latino	295	5.8%
Two or more races	270	5.3%
Other race	142	2.8%
Asian	22	0.4%
American Indian / Alaska Native	6	0.1%

Household income

Under $10k 1.1%

$10k–$15k 2.9%

$15k–$25k 5.0%

$25k–$35k 6.1%

$35k–$50k 11.4%

$50k–$75k 19.9%

$75k–$100k 16.6%

$100k–$150k 21.7%

$150k–$200k 6.0%

$200k+ 9.4%

Range	% of households
Under $10k	1.1%
$10k–$15k	2.9%
$15k–$25k	5.0%
$25k–$35k	6.1%
$35k–$50k	11.4%
$50k–$75k	19.9%
$75k–$100k	16.6%
$100k–$150k	21.7%
$150k–$200k	6.0%
$200k+	9.4%
Median income	$78,000

Housing

Home values

Under $50k 2.8%

$50k–$100k 1.9%

$100k–$150k 11.4%

$150k–$200k 8.0%

$200k–$300k 37.0%

$300k–$500k 31.1%

$500k–$1M 5.8%

$1M+ 1.9%

Housing overview

Metric	Value
Median home value	$266,100
Median rent / month	$1,215
Owner occupied	81.2%
Renter occupied	18.8%
Vacant	11.0%
Single-family detached	87.2%
Large apartment buildings	0.0%
Mobile homes	6.0%
Median rooms	6.6
Avg household size (owned)	2.65

Year built

Era	%
2020 or later	0.0%
2010–2019	8.2%
2000–2009	11.0%
1990–1999	14.6%
1980–1989	13.4%
1970–1979	12.9%
1960–1969	7.7%
1950–1959	6.0%
1940–1949	9.6%
1939 or earlier	16.5%

Bedrooms

Size	% of units
No bedroom (studio)	2.4%
1 bedroom	4.4%
2 bedrooms	12.1%
3 bedrooms	61.6%
4 bedrooms	15.2%
5+ bedrooms	4.4%

Vehicles per household

Vehicles	% of households
No vehicle	3.4%
1 vehicle	25.3%
2 vehicles	37.8%
3 or more	33.5%

Heating fuel

Fuel type	%
Utility gas	4.0%
Electricity	47.4%
Propane / LP gas	17.3%
Fuel oil	21.5%
Wood	7.1%
Solar	0.9%

Households & families

Household type	Count	%
Married-couple family	1,043	56.7%
Cohabiting couple	122	6.6%
Male householder, no spouse	285	15.5%
Female householder, no spouse	388	21.1%
Households with children under 18	569	31.0%
Households with seniors (65+)	541	29.4%
Average household size	2.57

Marital status

Status	Male	Female
Never married	28.8%	21.4%
Married	56.6%	58.4%
Separated	0.0%	2.1%
Widowed	1.2%	10.1%
Divorced	13.4%	8.0%

Education

Less than 9th grade 0.8%

Some HS, no diploma 6.2%

HS graduate 38.8%

Some college, no degree 23.5%

Associate's degree 9.2%

Bachelor's degree 10.5%

Graduate / professional 11.0%

Metric	%
HS diploma or higher	93.0%
Bachelor's or higher	21.5%

School enrollment (ages 3–17)

Type	Count	%
Nursery / preschool	80	7.0%
Kindergarten	72	6.3%
Elementary school	528	46.0%
High school	245	21.4%
College / grad school	222	19.4%

Employment

Industry of employment

Education & healthcare 23.7%

Construction 10.7%

Retail trade 9.6%

Professional & management 7.8%

Transportation & utilities 7.0%

Other services 6.8%

Public administration 6.8%

Agriculture & mining 6.7%

Manufacturing 6.2%

Arts, food & hospitality 4.5%

Finance & real estate 4.3%

Wholesale trade 3.8%

Information 2.1%

Occupation

Category	%
Management, business & arts	35.0%
Service	19.0%
Sales & office	20.5%
Natural resources & construction	14.2%
Production & transportation	11.3%

Employment type

Type	%
Private sector	76.0%
Government	16.7%
Self-employed	7.3%
Unpaid family workers	0.0%

Commute

Method	%
Drive alone	86.9%
Carpool	3.4%
Public transit	0.0%
Walk	1.6%
Other means	3.3%
Avg commute (minutes)	29.8

Poverty

All people 8.5%

Under 18 years 17.3%

18 and over 6.1%

Married-couple families 3.0%

Female-led households 17.9%

Income support

Source	% of households
Social Security	28.7%
Retirement income	26.2%
Supplemental Security	3.9%
Cash public assistance	2.1%
Food stamps / SNAP	13.2%

Health indicators

Condition	%
High blood pressure	35.8%
High cholesterol	35.7%
Heart disease	6.3%
Stroke	3.2%
Asthma	10.2%
Arthritis	28.2%
Kidney disease	2.9%
Pulmonary disease	6.9%
Cancer	7.1%

Behavior / access	%
Binge drinking	14.9%
No physical activity	23.6%
Less than 7 hrs sleep	33.8%
Fair or poor health	13.5%
Poor mental health	14.8%
Poor physical health	9.6%
No health insurance	10.3%
Visited doctor (checkup)	79.1%
Visited dentist	64.7%
Cholesterol screening	91.9%
Teeth loss	11.8%

Veterans & disability

Veterans	Count	%
Civilian veterans	244	6.5%

Disability	%
Any disability	12.0%
Under 18	2.8%
18–64 years	10.2%
65 and over	31.5%

Health insurance coverage

Type	%
Private insurance	71.5%
Public insurance	42.5%
Uninsured under 19	0.0%

Language & origin

Language spoken at home (age 5+)

Language	Count	%
English only	4,572	96.2%
Spanish	30	0.7%
Other Indo-European	0	0.0%
Asian & Pacific Islander	23	0.5%
Other languages	7	0.2%

Place of birth & citizenship

Origin	Count	%
Native born (US)	4,659	98.0%
Born in same state	4,615	97.1%
Born in different state	3,603	75.8%
Foreign born	44	0.9%
Naturalized citizen	94	2.0%
Not a US citizen	34	36.2%

Ancestry

Ancestry	Count	%
Arab	819	17.2%
French	790	16.6%
Italian	618	13%

Ancestry	Count	%
English	42	0.9%
German	9	0.2%

Technology access

Metric	% of households
Computer access	38.7%
Internet access	92.3%

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

Frequently asked questions

What ZIP codes does Preston, MD have?

Preston, MD has one ZIP code: 21655. Each ZIP code serves a distinct delivery area within the city and surrounding region.