Mechanicsville ZIP Codes — Saint Marys County, MD

There is one unique ZIP code in Mechanicsville, Maryland and it is 20659. Area code: 240/301.

ZIP codes

97.01

sq mi land

9.49

sq mi water

240/301

area code

Mechanicsville, MD ZIP code map

About Mechanicsville, MD

Mechanicsville is a charming community located in Maryland, known for its rich history and tight-knit atmosphere. Situated in Saint Marys County, this small town offers a unique blend of rural charm and modern conveniences. Residents enjoy a peaceful lifestyle surrounded by lush landscapes and friendly neighbors.

Location & geography

Mechanicsville is located in the southern part of Maryland, approximately 12 miles northwest of California, MD and about 15 miles southeast of La Plata, MD. The area encompasses a total land area of 97.01 square miles, with a significant water area measuring 9.49 square miles. The terrain is characterized by its rolling hills and small waterways, which contribute to the scenic beauty of the region.

Community & economy

The community of Mechanicsville is known for its warm and welcoming character, where residents often engage in local events and support one another. Key industries in the area include agriculture and small businesses that cater to the local population. Daily life here reflects a blend of traditional values and modern living, with a focus on community involvement and outdoor activities.

Transportation

Mechanicsville is serviced by several important highways, including Maryland Route 5, which facilitates travel to nearby towns and cities. The nearest major airport is the Maryland Aviation Administration, providing access to broader regions. Public transit options are limited, with most residents relying on personal vehicles for transportation.

History

Mechanicsville was founded in the 19th century and has a history rooted in agriculture and trade. Notable events in its history include the establishment of local farms that have sustained the community for generations. Its proximity to larger metropolitan areas has also made it a desirable location for those seeking a rural lifestyle while being close to urban amenities.

Did you know?

One surprising fact about Mechanicsville is that despite its small size, it has a strong sense of identity and community pride. Many local events are held throughout the year, celebrating the town's heritage and the arts.

ZIP codes for Mechanicsville, MD (1)

ZIP code	City	County	Map
20659	Mechanicsville	Saint Marys	View map

Demographics & statistics

23,346

Population

38.1

Median age

$115,729

Median household income

$46,226

Per capita income

$371,100

Median home value

$1,583

Median monthly rent

89.3%

Home ownership

7.1%

Poverty rate

3.8%

Unemployment

7,562

Housing units

24.1%

Bachelor's or higher

Age distribution

Male Female

854

Under 5

840

982

5–9

965

813

10–14

800

746

15–19

733

682

20–24

671

1,285

25–34

1,263

1,605

35–44

1,578

1,507

45–54

1,481

751

55–59

739

764

60–64

752

989

65–74

972

623

75–84

613

170

85+

168

← Male

Female →

Age summary

Group	Count	%
Under 18	6,170	26.4%
18 and over	17,176	73.6%
65 and over	3,535	15.1%
Median age	38.1 years

Race & ethnicity

White 85.9%

Black or African American 6.6%

Two or more races 3.9%

Hispanic or Latino 2.5%

Other race 0.8%

Asian 0.3%

Group	Count	%
White	20,555	85.9%
Black or African American	1,577	6.6%
Two or more races	935	3.9%
Hispanic or Latino	589	2.5%
Other race	193	0.8%
Asian	81	0.3%

Household income

Under $10k 4.3%

$10k–$15k 1.4%

$15k–$25k 4.3%

$25k–$35k 2.8%

$35k–$50k 6.9%

$50k–$75k 13.3%

$75k–$100k 10.0%

$100k–$150k 21.9%

$150k–$200k 15.2%

$200k+ 19.9%

Range	% of households
Under $10k	4.3%
$10k–$15k	1.4%
$15k–$25k	4.3%
$25k–$35k	2.8%
$35k–$50k	6.9%
$50k–$75k	13.3%
$75k–$100k	10.0%
$100k–$150k	21.9%
$150k–$200k	15.2%
$200k+	19.9%
Median income	$115,729

Housing

Home values

Under $50k 1.5%

$50k–$100k 0.9%

$100k–$150k 1.5%

$150k–$200k 2.3%

$200k–$300k 18.5%

$300k–$500k 55.3%

$500k–$1M 18.6%

$1M+ 1.5%

Housing overview

Metric	Value
Median home value	$371,100
Median rent / month	$1,583
Owner occupied	89.3%
Renter occupied	10.7%
Vacant	5.0%
Single-family detached	94.9%
Large apartment buildings	0.0%
Mobile homes	2.4%
Median rooms	7.2
Avg household size (owned)	2.89

Year built

Era	%
2020 or later	0.3%
2010–2019	9.1%
2000–2009	13.3%
1990–1999	22.7%
1980–1989	22.2%
1970–1979	20.8%
1960–1969	3.3%
1950–1959	3.2%
1940–1949	2.1%
1939 or earlier	3.0%

Bedrooms

Size	% of units
No bedroom (studio)	0.0%
1 bedroom	1.2%
2 bedrooms	6.7%
3 bedrooms	47.5%
4 bedrooms	33.0%
5+ bedrooms	11.6%

Vehicles per household

Vehicles	% of households
No vehicle	4.7%
1 vehicle	15.1%
2 vehicles	35.5%
3 or more	44.6%

Heating fuel

Fuel type	%
Utility gas	0.7%
Electricity	61.5%
Propane / LP gas	5.9%
Fuel oil	22.5%
Wood	6.7%
Solar	0.2%
No fuel used	1.6%

Households & families

Household type	Count	%
Married-couple family	4,947	61.9%
Cohabiting couple	449	5.6%
Male householder, no spouse	1,005	12.6%
Female householder, no spouse	1,594	19.9%
Households with children under 18	2,862	35.8%
Households with seniors (65+)	2,452	30.7%
Average household size	2.92

Marital status

Status	Male	Female
Never married	31.1%	25.3%
Married	57.2%	56.2%
Separated	0.4%	2.4%
Widowed	4.1%	7.7%
Divorced	7.2%	8.4%

Education

Less than 9th grade 3.8%

Some HS, no diploma 6.4%

HS graduate 37.4%

Some college, no degree 21.3%

Associate's degree 7.1%

Bachelor's degree 14.2%

Graduate / professional 9.9%

Metric	%
HS diploma or higher	89.8%
Bachelor's or higher	24.1%

School enrollment (ages 3–17)

Type	Count	%
Nursery / preschool	395	7.3%
Kindergarten	481	8.9%
Elementary school	2,657	49.2%
High school	1,112	20.6%
College / grad school	754	14.0%

Employment

Industry of employment

Education & healthcare 18.4%

Public administration 17.2%

Construction 13.7%

Professional & management 12.5%

Retail trade 10.1%

Arts, food & hospitality 5.6%

Other services 4.9%

Manufacturing 4.6%

Transportation & utilities 4.4%

Finance & real estate 4.4%

Agriculture & mining 1.7%

Wholesale trade 1.6%

Information 1.1%

Occupation

Category	%
Management, business & arts	45.6%
Service	13.3%
Sales & office	19.1%
Natural resources & construction	13.5%
Production & transportation	8.6%

Employment type

Type	%
Private sector	65.6%
Government	28.1%
Self-employed	5.2%
Unpaid family workers	1.0%

Commute

Method	%
Drive alone	76.5%
Carpool	6.4%
Public transit	2.5%
Walk	1.1%
Other means	0.6%
Avg commute (minutes)	42.2

Poverty

All people 7.1%

Under 18 years 7.5%

18 and over 7.0%

Married-couple families 3.6%

Female-led households 16.8%

Income support

Source	% of households
Social Security	28.7%
Retirement income	30.5%
Supplemental Security	2.6%
Cash public assistance	1.4%
Food stamps / SNAP	5.2%

Health indicators

Condition	%
High blood pressure	33.0%
High cholesterol	33.9%
Heart disease	5.1%
Stroke	2.4%
Asthma	10.0%
Arthritis	24.3%
Kidney disease	2.3%
Pulmonary disease	5.7%
Cancer	5.9%

Behavior / access	%
Binge drinking	16.6%
No physical activity	21.2%
Less than 7 hrs sleep	36.3%
Fair or poor health	11.1%
Poor mental health	14.5%
Poor physical health	8.2%
No health insurance	9.7%
Visited doctor (checkup)	75.4%
Visited dentist	68.6%
Cholesterol screening	91.1%
Teeth loss	10.9%

Veterans & disability

Veterans	Count	%
Civilian veterans	1,955	11.4%

Disability	%
Any disability	9.5%
Under 18	4.2%
18–64 years	7.1%
65 and over	27.9%

Health insurance coverage

Type	%
Private insurance	82.2%
Public insurance	25.2%
Uninsured under 19	12.4%

Language & origin

Language spoken at home (age 5+)

Language	Count	%
English only	21,652	92.7%
Spanish	587	2.7%
Other Indo-European	102	0.5%
Asian & Pacific Islander	446	2.1%
Other languages	39	0.2%

Place of birth & citizenship

Origin	Count	%
Native born (US)	22,975	98.4%
Born in same state	22,789	97.6%
Born in different state	14,046	60.2%
Foreign born	186	0.8%
Naturalized citizen	371	1.6%
Not a US citizen	235	63.3%

Ancestry

Ancestry	Count	%
Italian	3,506	15%
French	3,421	14.7%
Arab	1,873	8%
English	324	1.4%

Ancestry	Count	%
Polish	204	0.9%
German	92	0.4%
Irish	69	0.3%
Dutch	32	0.1%

Technology access

Metric	% of households
Computer access	34.2%
Internet access	91.5%

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

Frequently asked questions

What ZIP codes does Mechanicsville, MD have?

Mechanicsville, MD has one ZIP code: 20659. Each ZIP code serves a distinct delivery area within the city and surrounding region.