PlainZIP

Sea Island, GA · standard

ZIP Code 31561

Glynn County, Georgia - Census ACS demographics, housing tenure, and business patterns, benchmarked against every US ZIP.

298
24/sq mi
$250,001
Median income
$2,000,001
Median home value
100.0%
Bachelor's or higher

The verdict

Sea Island pairs a top-decile household income with top-decile home values, in a rural, homeowner-dominated area.

Top 1%
household income, US ZIPs
Top 1%
home value, US ZIPs
24
people per sq mi
100%
owner-occupied homes

Source: U.S. Census Bureau ACS 5-Year Estimates (2019–2023). Percentiles rank ZIP 31561 against every reporting US ZIP.

ZIP code 31561 is a sparsely populated ZIP (a standard USPS delivery area) in Sea Island, Glynn County, Georgia, home to just 298 residents across 12.2 square miles, a density of 24 people per square mile, in the New York time zone.

ZIP 31561 skews affluent, with a median household income of $250,001 (255% above the Georgia average), while per-capita income is $191,870. Local economic indicators show a 0.0% poverty rate alongside 0.0% unemployment. On housing, the median home value is $2,000,001 (731% above the state average) with median rent at - per month, and 100.0% of occupied units are owner-occupied.

This is a highly-educated ZIP: 100.0% of adults hold a bachelor's degree or higher, the median age is 69.6, and the average commute is -. A geography-based comparison follows: 3 ZIP codes within about 10 miles of 31561, plus 6 more within Glynn County, give a clearer read than the national average alone.

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 →

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 31561, Sea Island, GA · 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

298

Population

12.2

Area (sq mi)

24

People / sq mi

New York

Time Zone

standard

ZIP Type

Neighborhood Scorecard
Get an A-F grade across income, safety, housing, rent, education, commute, and childcare for this ZIP code.
View Scorecard →

Who lives in ZIP 31561?

69.6

Median Age

51.0%

Male

49.0%

Female

0.0%

Foreign-Born

White 100.0%
African American 0.0%
Asian 0.0%
American Indian or Alaska Native 0.0%
Native Hawaiian or Pacific Islander 0.0%
Two or More Ethnicities 0.0%
Hispanic or Latino 0.0%

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?

$250,001

Median Household Income

+255% vs state

$191,870

Per Capita Income

0.0%

Poverty Rate

0.0%

Unemployment Rate

How ZIP 31561 ranks nationally

Sea Island, GA household income vs. every US ZIP code

Median household income, the full national distribution, with this ZIP marked

$250,001 Top 1% higher than 99% of 30,318 US ZIPs

$0–$20,000: 118 US ZIPs (0%). Below this entry. $20,000–$40,000: 1,573 US ZIPs (5%). Below this entry. $40,000–$60,000: 7,092 US ZIPs (23%). Below this entry. $60,000–$80,000: 9,980 US ZIPs (33%). Below this entry. $80,000–$100,000: 5,778 US ZIPs (19%). Below this entry. $100,000–$120,000: 2,855 US ZIPs (9%). Below this entry. $120,000–$140,000: 1,362 US ZIPs (4%). Below this entry. $140,000–$160,000: 686 US ZIPs (2%). Below this entry. $160,000–$180,000: 364 US ZIPs (1%). Below this entry. $180,000–$200,000: 186 US ZIPs (1%). Below this entry. $200,000–$220,000: 324 US ZIPs (1%). This entry sits in this band. This ZIP $0 $200K+ every reporting US ZIP, bucketed by value

Each bar is a $20K-wide band; taller bars hold more US 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?

High School Graduate or Higher 100.0%
Bachelor's Degree or Higher 100.0%

Source: U.S. Census Bureau, ACS 5-Year Estimates (2023)

What does housing look like?

373

Total Housing Units

40

Occupied Units

333

Vacant Units

2.40

Avg Household Size

Occupancy Type

Owner 100.0%
Renter 0.0%

$2,000,001

Median Home Value

+731% vs state

1983

Median Year Built

Source: U.S. Census Bureau, ACS 5-Year Estimates (2023)

What businesses operate in this ZIP?

Census Bureau data shows 11 business establishments in ZIP 31561, employing approximately 1,200 people with a combined annual payroll of $74,839,000.

11

Businesses

1,200

Employees

$74.8M

Annual Payroll

0

Industry Sectors

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 31561 vs 31522 →

ZIP 31561 vs its nearest neighbors, by population

Resident population of this ZIP and the closest reporting ZIP codes within ~10 miles.

residents

What this shows Among its immediate neighbors, ZIP 31561 ranks #3 by population - useful context the national average alone can't give.

Source U.S. Census Bureau · ACS 5-Year Estimates As of 2019–2023
ZIP Code City Population Distance
31522 Saint Simons Island, GA 14,447 2.5 mi
31524 Brunswick, GA 0 8.4 mi
31527 Jekyll Island, GA 805 10.9 mi

More ZIP Codes in Glynn County

31525 standard
Brunswick, GA
Pop: 28,247
31520 standard
Brunswick, GA
Pop: 22,336
31522 standard
Saint Simons Island, GA
Pop: 14,447
31523 standard
Brunswick, GA
Pop: 13,229
31527 standard
Jekyll Island, GA
Pop: 805
31524 standard
Brunswick, GA
Pop: -

Related Areas

Glynn County Sea Island, GA Georgia

Frequently Asked Questions

What county is ZIP code 31561 in? ▼
ZIP code 31561 (Sea Island) is located in Glynn County, Georgia. Glynn County contains multiple ZIP codes, see the full list at /counties/glynn-ga.
What is the population of ZIP code 31561? ▼
ZIP code 31561 in Sea Island, GA has a population of 298 according to the Census Bureau ACS 2023 estimates.
What is the median household income in ZIP 31561? ▼
The median household income in ZIP 31561 is $250,001, which is 228% above the national average of $76,288.
What is the average home value in ZIP 31561? ▼
The median home value in ZIP 31561 is $2,000,001, which is 619% above the national average of $278,155.
What is the demographic makeup of ZIP 31561? ▼
The largest racial group in ZIP 31561 is White at 100.0%.
How many businesses are in ZIP code 31561? ▼
ZIP code 31561 has 11 business establishments employing approximately 1,200 people, according to Census Bureau ZIP Code Business Patterns (ZBP) 2023 data.
What is the education level in ZIP code 31561? ▼
In ZIP code 31561, 100.0% of residents aged 25+ have a high school diploma or higher, and 100.0% hold a bachelor's degree or higher. These figures come from the Census Bureau ACS 5-Year Estimates (2023).

Read our methodology to see how this data is sourced, computed, and verified.