What city is 31312 in?

31312 is a Guyton, GA mailing address. By land area, 2% lies inside Guyton; the rest is outside any Census-defined city or community.

What is the population of 31312?

About 25,991 people (±1,449), according to the Census Bureau's American Community Survey 5-year estimates for 2020–2024. The 2020 Census counted 24,401.

What is the median household income in 31312?

$101,750 (±$5,008), 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 31312?

14 USPS carrier routes with 9,656 residential and 82 business mailboxes (9,739 in all), from the route data stored by EDDM2GO. An EDDM mailing can target any combination of these routes.

What ZIP codes are near 31312?

The closest, measured center to center: 31329 (8.1 mi, Springfield), 31307 (9.8 mi), 31308 (10.4 mi), 31326 (10.5 mi, Rincon), 30415 (11.8 mi, Brooklet) and 31318 (12.8 mi).

31312 ZIP Code, Guyton, GA

31312 is a ZIP code in Guyton, Georgia in Effingham County. It covers 175 square miles of land. The closest ZIP codes are 31329, 31307 and 31308. 25,991 people live here in 8,313 households. With about 149 people per square mile it is lightly settled, and most homes are owner-occupied (88%). Median household income is $101,750, above the Georgia median of $77,353; 48% of households have children under 18.

Quick facts

Mailing city: Guyton, GA
County: Effingham County
Land area: 175 sq mi
Population: 25,991
Median household income: $101,750
Carrier routes: 14 (9,656 homes)

Key figures

Measure	Value
Residents	25,991
Households	8,313
Median household income	$101,750
Income per person	$37,946
Median age	34.4
Homeowners	87.8%
Median home value	$295,900
Median rent	$1,537
Bachelor's degree or higher	30.6%
Average commute (minutes)	33.3
Households with kids under 18	47.6%
Moved in the past year	8.9%
Below the poverty line	6.1%
Broadband internet	91.6%
Speak a non-English language at home	7.5%

Household income

% of households	Value
<$10K	1.7%
$10–15K	2.5%
$15–25K	3.9%
$25–35K	3.5%
$35–50K	6.3%
$50–75K	13.8%
$75–100K	16.8%
$100–150K	28.8%
$150–200K	10.6%
$200K+	12.1%

Age

% of all residents	Value
<10	17.5%
10–19	16.1%
20–24	4.0%
25–34	13.2%
35–44	16.2%
45–54	13.2%
55–64	10.8%
65–74	6.6%
75+	2.4%

Tenure

% of housing units	Value
Owned, with mortgage	60.6%
Owned outright	21.5%
Rented	11.4%
Vacant	6.6%

Type of building

% of housing units	Value
Detached house	80.9%
Townhome	0.5%
2–4 units	0.0%
5–19 units	0.7%
20+ units	0.0%
Mobile / other	17.9%

Businesses in 31312

224 business establishments with 1,355 employees (ZIP Codes Business Patterns 2023).

Construction: 42
Other Services (except Public Administration): 39
Transportation and Warehousing: 23
Professional, Scientific, and Technical Services: 22
Retail Trade: 21
Administrative and Support and Waste Management and Remediation Services: 21
Health Care and Social Assistance: 12
Manufacturing: 8

EDDM carrier routes

31312 has 14 USPS carrier routes with 9,656 residential and 82 business mailboxes. Open the EDDM route map.

Carrier routes in 31312

31312 has 14 USPS carrier routes (14 rural (R)) with 9,656 residential and 82 business mailboxes. Routes range from 525 homes (R003) to 882 homes (R008); the median route has 678 homes. The Census counted 8,313 households in 31312 (2020–2024 average); USPS counts current mailboxes, including new and vacant homes.

Homes per route	Routes
1–249	0
250–499	0
500–749	12
750–999	2
1,000–1,499	0
1,500+	0

Best routes in 31312 for…

Most businesses

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

Route R002 — USPS business mailboxes 22, 696 homes
Route R010 — USPS business mailboxes 16, 638 homes
Route R007 — USPS business mailboxes 9, 675 homes
Route R005 — USPS business mailboxes 6, 676 homes
Route R013 — USPS business mailboxes 5, 792 homes

Select these 5 routes on the route map

Every carrier route in 31312

Route	Type	Homes	Businesses	Est. median income	Est. owners	Est. families with kids	Est. moved in past year
R001	Rural	666	2	$91,510	—	—	—
R002	Rural	696	22	$77,677	—	—	—
R003	Rural	525	4	$104,482	—	—	—
R004	Rural	635	3	$130,280	—	—	—
R005	Rural	676	6	$109,537	—	—	—
R006	Rural	670	1	$100,000	—	—	—
R007	Rural	675	9	$103,177	—	—	—
R008	Rural	882	3	$79,252	—	—	—
R009	Rural	696	2	$83,459	—	—	—
R010	Rural	638	16	$100,000	—	—	—
R011	Rural	706	4	$83,459	—	—	—
R012	Rural	680	3	$83,459	—	—	—
R013	Rural	792	5	$109,390	—	—	—
R014	Rural	719	2	$104,482	—	—	—

Income, owners, families and movers are estimates for each route (how we estimate them); mailbox counts are current USPS figures. Open 31312 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

31329 — Springfield city, GA (8.1 mi)
31307 (9.8 mi)
31308 (10.4 mi)
31326 — Rincon city, GA (10.5 mi)
30415 — Brooklet city, GA (11.8 mi)
31318 (12.8 mi)
31302 — Bloomingdale city, GA (13.8 mi)
31303 (13.9 mi)

Areas that include 31312

Guyton, GA ZIP codes — 1 ZIP code
Effingham County ZIP codes — 8 ZIP codes
Georgia ZIP code data

Where it ranks

Mail every home in 31312

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) 31312, which approximates the USPS ZIP code area. Census figures: American Community Survey 5-year estimates, 2020–2024.

Frequently asked questions

What city is 31312 in?: 31312 is a Guyton, GA mailing address. By land area, 2% lies inside Guyton; the rest is outside any Census-defined city or community.
What county is 31312 in?: 31312 is in Effingham County.
What is the population of 31312?: About 25,991 people (±1,449), according to the Census Bureau's American Community Survey 5-year estimates for 2020–2024. The 2020 Census counted 24,401.
What is the median household income in 31312?: $101,750 (±$5,008), 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 31312?: 14 USPS carrier routes with 9,656 residential and 82 business mailboxes (9,739 in all), from the route data stored by EDDM2GO. An EDDM mailing can target any combination of these routes.
What ZIP codes are near 31312?: The closest, measured center to center: 31329 (8.1 mi, Springfield), 31307 (9.8 mi), 31308 (10.4 mi), 31326 (10.5 mi, Rincon), 30415 (11.8 mi, Brooklet) and 31318 (12.8 mi).

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