| City: | Sea Island, Georgia |
| City Alias: | Brunswick |
| County: | Glynn County |
| Timezone: | Eastern (GMT -05:00) |
| Local Time: | 8:23:44 PM |
| Population: | 190 [See All] |
| Area Code: | 912 |
| Classification: | PO Box |
| Coordinates: | 31.1952, -81.3369 |
| Land Area: | 4.719 sq mi |
| Quick Link: |
Sea Island is one of America's most exclusive addresses. This private barrier island off the Georgia coast has just 190 year-round residents but 582 housing units. The math tells the story: 80% of homes sit empty most of the year, owned by families who visit seasonally. Median home values exceed $2 million.
The post office maintains 451 PO Boxes for a community with only 93 occupied households. That's a 4.85:1 ratio, meaning nearly five boxes exist for every local home. Seasonal homeowners keep boxes year-round. Visiting families need a place to receive mail. The Cloister resort and Sea Island Company generate additional business mail. Rural carriers handle delivery across two routes, but the PO Box remains the practical choice for most.
This isn't a typical beach town. Median age hits 67.8 years, the highest you'll find almost anywhere. There are zero children under 18 and zero young adults aged 18-24. The community is almost entirely retirement-age couples or older. Educational attainment runs high at 72.3% with bachelor's degrees or higher, and median household income reaches $144,375.
Street names trace the island's resort heritage. Sea Island Drive runs 32 address records, the main thoroughfare. Oglethorpe Drive (20 records) honors Georgia's founder. Ocean Road (11 records) and Cloister Drive reference the landscape and the famous resort. Scottish place names like Dunkeld Lane, Melrose Lane, Moray Lane, and Fife Lane appear throughout, reflecting the island's design heritage.
Street names blend coastal geography with Georgia history and Scottish place names reflecting the resort's design heritage.
ZIP Code 31561 has 190 residents and 93 households (average 2.04 persons per household). The median age is 67.8 years, significantly older than the state (37.5) and significantly older than the nation (38.8). The gender split is 53.2% male and 46.8% female, which is higher than the state male share (48.4%), making this a male-majority area. Largest groups are White (96.8%, much higher than the state average of 51.9% and well above the national average of 61.6%) and Asian (1.6%, lower than the national average of 6.0%); Hispanic or Latino residents make up 1.1%, which is much lower than the national average (18.7%).
Explore More:Population Over TimeBy Age & GenderBy RaceBy GenderNativity & Citizenship
| 2020 Population: | 190Source: Census DHC |
| 2024 ACS Population Estimate: | 96Source: Census ACS |
| 2026 ZC Population Estimate: | 0Source: ZIP-Codes.com |
| Population Density: | 40.3 people per sq mile |
| Average Income: | $250,001Source: Census ACS |
| Households: | 93Source: Census DHC |
| Average House Value: | $2,000,001Source: Census ACS |
| Persons Per Household: | 2.04Source: Census DHC |
| Average Family Size: | 3.51Source: Census ACS |
| Group | 2010 | 2011 | 2102 | 2013 | 2014 | 2015 | 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Census ACS Population Estimate | -- | 264 | 306 | 560 | 325 | 320 | 300 | 268 | 39 | 47 | 102 | 103 | 210 | 94 | 96 |
| Decennial Census | 298 | -- | -- | -- | -- | -- | -- | -- | -- | -- | 190 | -- | -- | -- | -- |
Median Age: 67.8
Male Median Age: 70.6
Female Median Age: 60.9
| Group | < 5 | 5-9 | 10-14 | 15-19 | 20-24 | 25-29 | 30-34 | 35-39 | 40-44 | 45-49 | 50-54 | 55-59 | 60-64 | 65-69 | 70-74 | 75-79 | 80-84 | 85+ |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Male | 0 | 0 | 1 | 0 | 3 | 10 | 0 | 0 | 6 | 1 | 4 | 1 | 8 | 13 | 36 | 5 | 8 | 5 |
| Female | 0 | 5 | 1 | 1 | 13 | 0 | 4 | 0 | 7 | 1 | 0 | 2 | 13 | 20 | 1 | 18 | 0 | 3 |
| Total | 0 | 5 | 2 | 1 | 16 | 10 | 4 | 0 | 13 | 2 | 4 | 3 | 21 | 33 | 37 | 23 | 8 | 8 |
| White: | 184 | 96.34% |
| Black: | 2 | 1.05% |
| Hispanic:* | 2 | 1.05% |
| Asian: | 3 | 1.57% |
| American Indian: | 0 | 0% |
| Hawaiian: | 0 | 0% |
| Other: | 0 | 0% |
| Total: | 191 | 100% |
| Gender | Count | % | Median Age |
|---|---|---|---|
| Males: | 101 | 53.16% | 70.6 years |
| Females: | 89 | 46.84% | 60.9 years |
| Total: | 190 | 100% | 67.8 years |
| Native, born in the United States: | 96 | 100.00% |
| Native, born in PR, Island Areas, or abroad: | 0 | 0.00% |
| Foreign born, naturalized U.S. citizen: | 0 | 0.00% |
| Foreign born, not a U.S. citizen: | 0 | 0.00% |
| Total Population: | 96 | 100% |
| Total Native Population: | 96 | 100.00% |
| Total Foreign-born Population: | 0 | 0.00% |
In 2024, the Median household income is $250,001, which is much higher than the national median ($80,734), is up $127,418 (103.9%) since 2011 and above its 2019 pre-pandemic level by $250,001. Family households earn a median of $250,001 versus $0 for nonfamily households (a difference of $250,001). By gender, male median income is $0 and female is $0, which is considerably lower than the national female median ($55,274), with a current gap of $0 that has stayed about the same from 2011 to 2024. The labor-force participation rate is 22.1%, which is considerably lower than the national rate (63.5%). The unemployment rate is 0.0%, which is considerably lower than the national rate (5.2%). The largest occupation group is Management (100.0%).
Explore More:Income Over TimeHousehold IncomeEmployment StatusBy Occupation
| Income Type | 2011 | 2012 | 2013 | 2014 | 2015 | 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Median Household Income | $122,583 | $18,654 | $19,444 | $25,625 | $0 | $25,446 | $0 | $0 | $0 | $0 | $0 | $87,125 | $144,375 | $250,001 |
| Median Family Income | $135,156 | $19,423 | $13,854 | $11,887 | $0 | $0 | $0 | $0 | $0 | $0 | $0 | $86,625 | $151,354 | $250,001 |
| Median NonFamily Income | $45,078 | $2,499 | $0 | $0 | $0 | $0 | $0 | $0 | $0 | $0 | $0 | $0 | $0 | $0 |
| Median Male Income | $0 | $0 | $0 | $0 | $0 | $0 | $0 | $0 | $0 | $0 | $0 | $0 | $0 | $0 |
| Median Female Income | $0 | $0 | $0 | $0 | $0 | $0 | $0 | $0 | $0 | $0 | $0 | $0 | $0 | $0 |
| Employed: | 19 | 22.09% |
| Unemployed: | 0 | 0.00% |
| Not In Labor Force: | 67 | 77.91% |
| Total: | 86 | 100% |
| Management, business, science, and arts: | 19 | 100.00% |
| Service: | 0 | 0.00% |
| Sales and Office: | 0 | 0.00% |
| Natural resources, construction, and maintenance: | 0 | 0.00% |
| Production, transportation, and material moving: | 0 | 0.00% |
| Total Civilian Employed Population: | 19 | 100% |
In 2024, the median home value is $2,000,001, which is considerably higher than the national median ($332,700), is up $1,241,701 (163.75%) since 2011 and above its 2019 pre-pandemic level by $2,000,001. The median gross rent is $0, which is well under the national median ($1,413), and above its 2019 pre-pandemic level by $0. Insufficient data for owner/renter mix. The vacancy rate is 89.28%, which is considerably higher than the national rate (10.12%).
Explore More:Compare Home ValueHome Value Over TimeRent & Over TimeHousing Occupancy
| Group | 2011 | 2102 | 2013 | 2014 | 2015 | 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Median Home Value | $758,300 | $13,500 | $1,000,001 | $0 | $0 | $0 | $0 | $0 | $0 | $0 | $0 | $0 | $2,000,001 | $2,000,001 |
| Less than $500: | 0 | 0% |
| $500 to $999: | 0 | 0% |
| $1,000 to $1,499: | 0 | 0% |
| $1,500 to $1,999: | 0 | 0% |
| $2,000 to $2,499: | 0 | 0% |
| $2,500 to $2,999: | 0 | 0% |
| $3,000 or more: | 0 | 0% |
| No Rent: | 0 | 0% |
| Total: | 0 | 100% |
| Group | 2011 | 2102 | 2013 | 2014 | 2015 | 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Median Rent | $0 | $2,001 | $0 | $0 | $0 | $0 | $0 | $0 | $0 | $0 | $0 | $0 | $0 | $0 |
| Owner Occupied (with mortgage): | 11 | 27.50% |
| Owner Occupied (free and clear, no mortgage): | 29 | 72.50% |
| Renter Occupied: | 0 | 0.00% |
| Total Occupied Housing Units: | 40 | 100% |
| Occupied Housing Units: | 40 | 10.72% |
| Vacant Housing Units (not graphed): | 333 | 89.28% |
| Total Housing Units: | 373 | 100% |
| Single-Family Units: | 373 | 100.00% |
| Multi-Family Units: | 0 | 0.00% |
| Other Units: | 0 | 0.00% |
| Total Housing Units: | 373 | 100% |
In 2024, 100.00% of adults (25+) have a bachelor's degree or higher, which is far higher than the national rate (35.70%). High school or higher is 100.00%, which is comparable to the national rate (89.60%). The uninsured rate is 0.00%, which is comparable to the national rate (8.40%). The share of people in poverty is 0.00%, which is comparable to the national rate (8.80%), down 25.00 percentage points since 2011. This points to a pronounced improvement in local conditions - rising incomes, firmer consumer demand, and a stronger tax base. Among residents ages 3+, the largest enrollment group is elementary (52.63%). College enrollment is 0.00%, which is comparable to the national rate (26.70%), meaning the community mirrors broader higher-education participation.
Explore More:Educational AttainmentHealth InsurancePoverty Over TimeSchool Enrollment
| Less than 9th grade: | 0 | 0.00% |
| 9th to 12th grade, no diploma: | 0 | 0.00% |
| High school graduate (includes equivalency): | 0 | 0.00% |
| Some college, no degree: | 0 | 0.00% |
| Associate's degree: | 0 | 0.00% |
| Bachelor's degree: | 27 | 35.06% |
| Graduate or professional degree: | 50 | 64.94% |
| Total: | 77 | 100% |
| High school or higher: | 77 | 100.00% |
| Bachelor's degree or higher: | 77 | 100.00% |
| Private Insurance: | 59 | 50.86% |
| Public Insurance: | 57 | 49.14% |
| No Insurance: | 0 | 0.00% |
| Total: | 116 | 100% |
| Has Health Insurance: | 116 | 100.00% |
| Group | 2011 | 2102 | 2013 | 2014 | 2015 | 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| % of People in Poverty | 25.0% | 58.6% | 77.8% | 66.3% | 67.9% | 78.1% | 100.0% | 0.0% | 0.0% | 0.0% | 0.0% | 0.0% | 0.0% | 0.0% |
Note: Counts of Families & People in poverty are not published at the ZIP Code level due to small sample sizes. Percentages shown are survey estimates from the American Community Survey (ACS). They may differ from official poverty statistics. The U.S. Census Bureau defines poverty status by comparing a family's or individual's total income with federal poverty thresholds that vary by family size and composition.
| Nursery School, Preschool: | 0 | 0.00% |
| Kindergarten: | 0 | 0.00% |
| Elementary school (grades 1-8): | 10 | 52.63% |
| High school (grades 9-12): | 9 | 47.37% |
| College or graduate school: | 0 | 0.00% |
| Total: | 19 | 100% |
| Early Childhood: | 0 | 0.00% |
| K-12 (Primary & Secondary School): | 19 | 100.00% |
ZIP Code 31561 supports both business and residential activity. According to the Business Census (2024), there are 11 business establishments, employing about 1,200 people with an annual payroll of $74,839,000.
| # Residential Mailboxes: | 0Source: USPS |
| # Business Mailboxes: | 0Source: USPS |
| Total Delivery Receptacles: | 506Source: USPS |
| Single Family Delivery Units: | 0Source: USPS |
| Multi Family Delivery Units: | 0Source: USPS |
| # of Businesses: | 11Source: CBP |
| 1st Quarter Payroll: | $18,007,000Source: CBP |
| Annual Payroll: | $74,839,000Source: CBP |
| # of Employees: | 1,200Source: CBP |
ZIP Code 31561 is located in Glynn County, Georgia, within the Brunswick-St. Simons, GA Metropolitan Statistical Area (CBSA 15260) and Georgia's 1st Congressional District. This Metro area has a population of 112,370 people, about 0.17% of whom live in ZIP Code 31561. It covers 4.719 sq mi of land and a water area of 4.17 sq mi.
| CBSA Name: | Brunswick-St. Simons, GASource: Census |
| CBSA Number: | 15260Source: Census |
| CBSA Type: | MetroSource: Census |
| CBSA Division: | --Source: Census |
| CBSA Population: | 112,370Source: Census |
| MSA: | Source: Census |
| Land Area: | 4.719 sq miSource: Census |
| Water Area: | 4.17 sq miSource: Census |
| Congressional District: | 01Source: USPS |
| Congressional Land Area: | 7982.81 sq miSource: Census |
| PMSA: | Source: Census |
| Intro Date: | < 2004-10Source: ZIP-Codes.com |
| Place FIPS Code: | --Source: Census |
| Place Name: | --Source: Census |
We could not locate which school district 31561 belongs to, but we will update this once new district data is released. There are no public schools nor private schools with a mailing address in this ZIP Code. Listing Nearby schools instead. It also has 6 colleges, universities or post secondary education institutions nearby which would be a short commute to.
Our sources include trusted federal and licensed data from the United States Postal Service, U.S. Census Bureau, U.S. Geological Survey, Centers for Medicare & Medicaid Services, and the National Center for Education Statistics, along with proprietary datasets created by ZIP-Codes.com. Data last updated on February 1, 2026.