31328 ZIP Code, Tybee Island, GA
31328 is a ZIP code in Tybee Island, Georgia in Chatham County. It covers 9.2 square miles of land. The closest ZIP codes are 31410, 29915 and 31411. 3,353 people live here in 1,575 households. With about 365 people per square mile it is lightly settled, and most homes are owner-occupied (89%). Median household income is $109,631, above the Georgia median of $77,353; the median age is 61.1, older than most ZIP codes.
Quick facts
- Mailing city: Tybee Island, GA
- County: Chatham County
- Land area: 9.2 sq mi
- Population: 3,353
- Median household income: $109,631
- Carrier routes: 2 (1,000 homes)
Key figures
| Measure | Value |
|---|---|
| Residents | 3,353 |
| Households | 1,575 |
| Median household income | $109,631 |
| Income per person | $55,031 |
| Median age | 61.1 |
| Homeowners | 88.8% |
| Median home value | $619,800 |
| Median rent | $1,665 |
| Bachelor's degree or higher | 46.9% |
| Average commute (minutes) | 25.9 |
| Households with kids under 18 | 15.6% |
| Moved in the past year | 4.5% |
| Below the poverty line | 7.3% |
| Broadband internet | 94.1% |
| Speak a non-English language at home | 4.8% |
Household income
| % of households | Value |
|---|---|
| <$10K | 0.3% |
| $10–15K | 2.2% |
| $15–25K | 6.0% |
| $25–35K | 8.2% |
| $35–50K | 7.1% |
| $50–75K | 6.3% |
| $75–100K | 10.8% |
| $100–150K | 32.3% |
| $150–200K | 15.1% |
| $200K+ | 11.7% |
Age
| % of all residents | Value |
|---|---|
| <10 | 2.2% |
| 10–19 | 8.2% |
| 20–24 | 1.9% |
| 25–34 | 4.6% |
| 35–44 | 7.8% |
| 45–54 | 11.0% |
| 55–64 | 23.3% |
| 65–74 | 20.8% |
| 75+ | 20.1% |
Tenure
| % of housing units | Value |
|---|---|
| Owned, with mortgage | 19.4% |
| Owned outright | 22.9% |
| Rented | 5.1% |
| Vacant | 52.6% |
Type of building
| % of housing units | Value |
|---|---|
| Detached house | 68.0% |
| Townhome | 7.8% |
| 2–4 units | 13.2% |
| 5–19 units | 3.1% |
| 20+ units | 7.8% |
| Mobile / other | 0.2% |
Businesses in 31328
167 business establishments with 1,305 employees (ZIP Codes Business Patterns 2023).
- Accommodation and Food Services: 51
- Real Estate and Rental and Leasing: 25
- Retail Trade: 19
- Professional, Scientific, and Technical Services: 14
- Construction: 11
- Health Care and Social Assistance: 10
- Other Services (except Public Administration): 8
- Transportation and Warehousing: 6
EDDM carrier routes
31328 has 2 USPS carrier routes with 1,000 residential and 15 business mailboxes. Open the EDDM route map.
Carrier routes in 31328
31328 has 2 USPS carrier routes (2 highway contract (H)) with 1,000 residential and 15 business mailboxes. Routes range from 431 homes (H032) to 569 homes (H033); the median route has 500 homes. The Census counted 1,575 households in 31328 (2020–2024 average); USPS counts current mailboxes, including new and vacant homes.
| Homes per route | Routes |
|---|---|
| 1–249 | 0 |
| 250–499 | 1 |
| 500–749 | 1 |
| 750–999 | 0 |
| 1,000–1,499 | 0 |
| 1,500+ | 0 |
Best routes in 31328 for…
Most businesses
For B2B offers: office supplies, cleaning, IT, catering and commercial services.
- Route H033 — USPS business mailboxes 10, 569 homes
- Route H032 — USPS business mailboxes 5, 431 homes
Select these 2 routes on the route map
Every carrier route in 31328
| Route | Type | Homes | Businesses | Est. median income | Est. owners | Est. families with kids | Est. moved in past year |
|---|---|---|---|---|---|---|---|
| H032 | Highway contract | 431 | 5 | $113,529 | — | — | — |
| H033 | Highway contract | 569 | 10 | $93,362 | — | — | — |
Income, owners, families and movers are estimates for each route (how we estimate them); mailbox counts are current USPS figures. Open 31328 on the EDDM route map.
How route demographics are estimated
Mailbox counts come from USPS; demographics are estimates
The number of homes and businesses on each carrier route is the current USPS EDDM count. The Census Bureau does not publish figures for carrier routes, so income, homeownership, ages, families, movers and housing age on a route are EDDM2GO estimates built from Census block groups (neighborhood areas of roughly 600 to 3,000 people).
How a route gets its figures: the block-group length-share method
We trace each route's streets every 25 meters and record which block group each stretch falls in. The route's homes are spread along its streets in proportion to length, so a route with 60% of its street length in one block group is assumed to have 60% of its homes there. Each block group then contributes its Census counts in proportion to the share of its housing units that sit on the route (capped at the whole block group). Medians are recalculated from the combined income, home-value and age brackets, the way the Census Bureau computes them, not averaged.
Margins of error
Census survey figures carry a margin of error at 90% confidence; we carry it through the calculation and show it as ±. Our margins treat the route-to-block-group split as exact, so the real uncertainty is larger. Routes with fewer than 100 estimated households, large margins, or streets we could not place are flagged.
Different years
USPS mailbox counts are current. Census figures are 5-year averages for 2020–2024, so a new subdivision may have more homes on the route today than the Census counted. Use the route figures to compare routes with each other, not as an exact head count.
Why some routes show identical figures
Two routes that run through the same block group get the same percentages and medians, because the Census publishes one set of figures for the whole block group. Their mailbox counts still differ, and those are exact.
Route and mailbox counts: USPS EDDM route data. Route demographics: EDDM2GO estimates from U.S. Census Bureau American Community Survey 5-year block-group data (2020–2024) and 2024 cartographic block-group boundaries. This product uses the Census Bureau Data API but is not endorsed or certified by the Census Bureau.
Nearby ZIP codes
- 31410 — Wilmington Island CDP, GA (5.8 mi)
- 29915 — Daufuskie Island CDP, SC (8.1 mi)
- 31411 — Skidaway Island CDP, GA (9.6 mi)
- 31404 — Savannah city, GA (10 mi)
- 31406 — Savannah city, GA (11.5 mi)
- 31421 — Savannah city, GA (12.4 mi)
- 31401 — Savannah city, GA (12.6 mi)
- 29928 — Hilton Head Island town, SC (13.8 mi)
Areas that include 31328
- Tybee Island, GA ZIP codes — 1 ZIP code
- Chatham County ZIP codes — 15 ZIP codes
- Georgia ZIP code data
Where it ranks
- No. 2 of 13: highest median household income in Chatham County
- No. 2 of 13: highest median home value in Chatham County
- No. 2 of 13: highest share of owner-occupied homes in Chatham County
- No. 2 of 13: highest median age in Chatham County
Mail every home in 31328
Route counts on this page price as Full Service 6.5 × 9 postcards: we print, bundle by carrier route and hand the mailing to USPS. Prefer to take it to the Post Office yourself? Print only costs less and you pay postage at drop-off.
EDDM guides
ZIP code statistics describe the Census ZIP Code Tabulation Area (ZCTA) 31328, which approximates the USPS ZIP code area. Census figures: American Community Survey 5-year estimates, 2020–2024.
Frequently asked questions
- What city is 31328 in?
- 31328 is a Tybee Island, GA mailing address. By land area, 31% lies inside Tybee Island; the rest is outside any Census-defined city or community.
- What county is 31328 in?
- 31328 is in Chatham County.
- What is the population of 31328?
- About 3,353 people (±99), according to the Census Bureau's American Community Survey 5-year estimates for 2020–2024. The 2020 Census counted 3,430.
- What is the median household income in 31328?
- $109,631 (±$21,660), compared with $77,353 for Georgia as a whole. Half the households in the ZIP code earn more and half earn less.
- How many carrier routes and mailboxes are in 31328?
- 2 USPS carrier routes with 1,000 residential and 15 business mailboxes (1,015 in all), from the route data stored by EDDM2GO. An EDDM mailing can target any combination of these routes.
- What ZIP codes are near 31328?
- The closest, measured center to center: 31410 (5.8 mi, Wilmington Island), 29915 (8.1 mi, Daufuskie Island), 31411 (9.6 mi, Skidaway Island), 31404 (10 mi, Savannah), 31406 (11.5 mi, Savannah) and 31421 (12.4 mi, Savannah).
This product uses the Census Bureau Data API but is not endorsed or certified by the Census Bureau.