31523 ZIP Code, Brunswick, GA

31523 is a ZIP code in Brunswick, Georgia in Glynn County. It covers 191 square miles of land. The closest ZIP codes are 31520, 31524 and 31525. 15,402 people live here in 5,666 households. It is rural, with fewer than 100 people per square mile, and most homes are owner-occupied (85%). Median household income is $88,988, above the Georgia median of $77,353.

Quick facts

Key figures

MeasureValue
Residents15,402
Households5,666
Median household income$88,988
Income per person$43,343
Median age40.9
Homeowners85.3%
Median home value$310,400
Median rent$988
Bachelor's degree or higher31.5%
Average commute (minutes)24.6
Households with kids under 1836.1%
Moved in the past year9.7%
Below the poverty line8.3%
Broadband internet91.9%
Speak a non-English language at home5.5%

Household income

% of householdsValue
<$10K4.1%
$10–15K2.8%
$15–25K4.4%
$25–35K2.9%
$35–50K10.8%
$50–75K19.6%
$75–100K12.1%
$100–150K21.1%
$150–200K10.6%
$200K+11.4%

Age

% of all residentsValue
<1012.0%
10–1915.0%
20–244.6%
25–3412.1%
35–4411.8%
45–5412.0%
55–6414.4%
65–748.1%
75+9.9%

Tenure

% of housing unitsValue
Owned, with mortgage58.2%
Owned outright23.3%
Rented14.0%
Vacant4.5%

Type of building

% of housing unitsValue
Detached house83.5%
Townhome0.6%
2–4 units1.1%
5–19 units0.5%
20+ units0.2%
Mobile / other14.1%

Businesses in 31523

299 business establishments with 2,760 employees (ZIP Codes Business Patterns 2023).

EDDM carrier routes

31523 has 11 USPS carrier routes with 6,440 residential and 328 business mailboxes. Open the EDDM route map.

Carrier routes in 31523

31523 has 11 USPS carrier routes (1 city (C), 10 rural (R)) with 6,440 residential and 328 business mailboxes. Routes range from 349 homes (R030) to 701 homes (R001); the median route has 609 homes. The Census counted 5,666 households in 31523 (2020–2024 average); USPS counts current mailboxes, including new and vacant homes.

Homes per routeRoutes
1–2490
250–4992
500–7499
750–9990
1,000–1,4990
1,500+0

Best routes in 31523 for…

Most businesses

For B2B offers: office supplies, cleaning, IT, catering and commercial services.

  1. Route R011 — USPS business mailboxes 76, 593 homes
  2. Route R006 — USPS business mailboxes 65, 609 homes
  3. Route C018 — USPS business mailboxes 58, 479 homes
  4. Route R026 — USPS business mailboxes 57, 608 homes
  5. Route R021 — USPS business mailboxes 18, 659 homes

Select these 5 routes on the route map

Every carrier route in 31523

RouteTypeHomesBusinessesEst. median incomeEst. ownersEst. families with kidsEst. moved in past year
C018City47958$102,074———
R001Rural7018$85,783———
R005Rural50716$58,961———
R006Rural60965$85,783———
R011Rural59376$128,968———
R013Rural6747$87,554———
R016Rural6163$102,074———
R019Rural6455$128,968———
R021Rural65918$100,940———
R026Rural60857$64,736———
R030Rural34915$128,968———

Income, owners, families and movers are estimates for each route (how we estimate them); mailbox counts are current USPS figures. Open 31523 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

Areas that include 31523

Where it ranks

Mail every home in 31523

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) 31523, which approximates the USPS ZIP code area. Census figures: American Community Survey 5-year estimates, 2020–2024.

Frequently asked questions

What city is 31523 in?
31523 is a Brunswick, GA mailing address. None of its land lies inside a Census-defined city or community.
What county is 31523 in?
31523 is in Glynn County.
What is the population of 31523?
About 15,402 people (±1,400), according to the Census Bureau's American Community Survey 5-year estimates for 2020–2024. The 2020 Census counted 14,803.
What is the median household income in 31523?
$88,988 (±$9,768), 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 31523?
11 USPS carrier routes with 6,440 residential and 328 business mailboxes (6,768 in all), from the route data stored by EDDM2GO. An EDDM mailing can target any combination of these routes.
What ZIP codes are near 31523?
The closest, measured center to center: 31520 (8 mi, Brunswick), 31524 (8.7 mi), 31525 (9.2 mi, Country Club Estates), 31565 (9.9 mi, Waverly), 31566 (11.3 mi, Waynesville) and 31527 (15.2 mi, Jekyll Island).

This product uses the Census Bureau Data API but is not endorsed or certified by the Census Bureau.