31561 ZIP Code — Sea Island, GA

Glynn County, Georgia

ZIP code 31561 is located in Sea Island, Georgia, within Glynn County. It covers approximately 4.72 square miles and serves a population of 210 residents. This is a standard ZIP code in the Eastern (ET) timezone, served by area code 912.

About ZIP code 31561

The housing stock consists of a mix of housing types. Most homes were built in the 2000s, giving the area an established character.

Median household income is $87,125. 100% of households receive Social Security income, suggesting a notable retiree or disability population.

The dominant occupation class is management, business, and professional, with education and healthcare as the leading industry.

Educational attainment is high — 53% of residents hold a bachelor's degree or higher, well above the national average of 33%.

Notable community characteristics include a notable veteran presence at 39% of civilians, above the national average of 7%.

Overall, ZIP code 31561 reflects a community defined by a highly educated population, a strong veteran community, high homeownership, and a significant Social Security-dependent population.

210

population

4.72

sq mi land

Standard

ZIP type

Eastern (ET)

timezone

31561 ZIP code map

Cities in ZIP code 31561

Below are the cities the US Postal Service accepts for ZIP code 31561. Using any city not on this list may result in mail delivery delays.

City	Status
Sea Island	Acceptable

Demographics updated 05/2026

Population
Total population	210
Population density	44 / sq mi
State FIPS	13
County FIPS	127

Geography
Land area	4.72 sq mi
Water area	4.17 sq mi
Latitude	31.1952
Longitude	-81.3369
Timezone	Eastern (ET)
Area code	912

Total population by age

Gender

Race & ethnicity

Economics updated 05/2026

Household income

Income range	This ZIP	County avg	State avg
Under $50k	0.0%	43.9%	41.5%
$50k – $100k	71.2%	29.5%	30.3%
$100k – $200k	28.8%	21.1%	21.2%
Over $200k	0.0%	5.5%	7.1%

Demographics & statistics

210

Population

People per sq mi

69.4

Median age

$87,125

Median household income

$58,312

Per capita income

Median home value

Median monthly rent

100.0%

Home ownership

0.0%

Poverty rate

0.0%

Unemployment

613

Housing units

53.3%

Bachelor's or higher

Age distribution

Male Female

65–74

103

85+

← Male

Female →

Age summary

Group	Count	%
Under 18	0	0.0%
18 and over	210	100.0%
65 and over	210	100.0%
Median age	69.4 years

Race & ethnicity

White 100%

Group	Count	%
White	210	100%

Household income

Income range	This ZIP	County avg	State avg
Under $50k	0.0%	43.9%	41.5%
$50k – $100k	71.2%	29.5%	30.3%
$100k – $200k	28.8%	21.1%	21.2%
Over $200k	0.0%	5.5%	7.1%

$75k–$100k 68.9%

$100k–$150k 31.1%

Range	% of households
$75k–$100k	68.9%
$100k–$150k	31.1%
Median income	$87,125

Housing

Home values

$1M+ 100.0%

Housing overview

Metric	Value
Median home value	$0
Median rent / month	$0
Owner occupied	100.0%
Renter occupied	0.0%
Vacant	80.6%
Single-family detached	69.3%
Large apartment buildings	10.6%
Mobile homes	0.0%
Median rooms	7.8
Avg household size (owned)	1.76

Year built

Era	%
2020 or later	0.0%
2010–2019	11.9%
2000–2009	37.0%
1990–1999	11.4%
1980–1989	13.5%
1970–1979	4.6%
1960–1969	0.0%
1950–1959	21.5%
1940–1949	0.0%
1939 or earlier	0.0%

Bedrooms

Size	% of units
No bedroom (studio)	9.8%
1 bedroom	10.6%
2 bedrooms	0.0%
3 bedrooms	0.0%
4 bedrooms	39.3%
5+ bedrooms	40.3%

Vehicles per household

Vehicles	% of households
No vehicle	0.0%
1 vehicle	23.5%
2 vehicles	10.1%
3 or more	66.4%

Heating fuel

Fuel type	%
Utility gas	82.4%
Electricity	17.6%

Households & families

Household type	Count	%
Married-couple family	91	76.5%
Cohabiting couple	0	0.0%
Male householder, no spouse	0	0.0%
Female householder, no spouse	28	23.5%
Households with children under 18	0	0.0%
Households with seniors (65+)	119	100.0%
Average household size	1.76

Marital status

Status	Male	Female
Never married	0.0%	0.0%
Married	100.0%	76.5%
Separated	0.0%	0.0%
Widowed	0.0%	23.5%
Divorced	0.0%	0.0%

Education

Less than 9th grade 13.3%

Some HS, no diploma 0.0%

HS graduate 0.0%

Some college, no degree 33.3%

Associate's degree 0.0%

Bachelor's degree 4.3%

Graduate / professional 49.0%

Metric	%
HS diploma or higher	86.7%
Bachelor's or higher	53.3%

School enrollment (ages 3–17)

Type	Count	%
Nursery / preschool	0	0.0%
Kindergarten	0	0.0%
Elementary school	0	0.0%
High school	0	0.0%
College / grad school	0	0.0%

Employment

Industry of employment

Education & healthcare 100.0%

Occupation

Category	%
Management, business & arts	100.0%
Service	0.0%
Sales & office	0.0%
Natural resources & construction	0.0%
Production & transportation	0.0%

Employment type

Type	%
Private sector	100.0%
Government	0.0%
Self-employed	0.0%
Unpaid family workers	0.0%

Commute

Method	%
Drive alone	100.0%
Carpool	0.0%
Public transit	0.0%
Walk	0.0%
Work from home	0.0%
Other means	0.0%
Avg commute (minutes)	0.0

Poverty

All people 0.0%

Under 18 years 0.0%

18 and over 0.0%

Married-couple families 0.0%

Female-led households 0.0%

Income support

Source	% of households
Social Security	100.0%
Retirement income	100.0%
Supplemental Security	0.0%
Cash public assistance	0.0%
Food stamps / SNAP	0.0%

Health indicators

Condition	%
Obesity	26.3%
High blood pressure	45.9%
High cholesterol	47.2%
Diabetes	13.7%
Heart disease	10.9%
Stroke	3.9%
Asthma	7.3%
Arthritis	38.5%
Kidney disease	4.3%
Pulmonary disease	7.0%
Cancer	14.4%

Behavior / access	%
Smoking	7.1%
Binge drinking	8.2%
No physical activity	20.5%
Less than 7 hrs sleep	22.9%
Depression	14.3%
Fair or poor health	11.3%
Poor mental health	8.4%
Poor physical health	9.1%
No health insurance	8.5%
Visited doctor (checkup)	85.9%
Visited dentist	75.9%
Cholesterol screening	97.9%
Teeth loss	7.2%

Veterans & disability

Veterans	Count	%
Civilian veterans	82	39.0%

Disability	%
Any disability	13.3%
Under 18	0.0%
18–64 years	0.0%
65 and over	13.3%

Health insurance coverage

Type	%
Private insurance	33.3%
Public insurance	100.0%
No insurance	0.0%
Uninsured under 19	0.0%

Language & origin

Language spoken at home (age 5+)

Language	Count	%
English only	210	100.0%
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)	210	100.0%
Born in same state	210	100.0%
Born in different state	189	90.0%
Foreign born	0	0.0%
Naturalized citizen	0	0.0%
Not a US citizen	0	0.0%

Ancestry

Ancestry	Count	%
Italian	140	66.7%
French	94	44.8%

Ancestry	Count	%
Arab	18	8.6%

Technology access

Metric	% of households
Computer access	56.7%
Internet access	100.0%

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

Frequently asked questions about ZIP code 31561

What city is ZIP code 31561 in?

ZIP code 31561 is primarily assigned to Sea Island, Georgia.

What county is ZIP code 31561 in?

ZIP code 31561 falls within Glynn County, Georgia.

Does ZIP code 31561 have an older population?

100% of residents in ZIP code 31561 are 65 or older, above the national average of ~17%.

Does ZIP code 31561 have a large retiree population?

100% of households in ZIP code 31561 receive Social Security income, suggesting a significant retiree or disability population.

Does ZIP code 31561 have a large veteran population?

39% of civilians in ZIP code 31561 are veterans, above the national average of ~7%.

How educated is the population of ZIP code 31561?

53% of residents hold a bachelor's degree or higher — well above the national average of ~33%, reflecting a highly educated population.

What timezone is ZIP code 31561 in?

ZIP code 31561 observes the EST timezone.