What city is 29403 in?

29403 is a Charleston, SC mailing address. By land area, 100% lies inside Charleston.

What is the population of 29403?

About 22,533 people (±1,398), according to the Census Bureau's American Community Survey 5-year estimates for 2020–2024. The 2020 Census counted 21,363.

What is the median household income in 29403?

$66,944 (±$8,620), compared with $69,324 for South Carolina as a whole. Half the households in the ZIP code earn more and half earn less.

How many carrier routes and mailboxes are in 29403?

18 USPS carrier routes with 12,090 residential and 1,038 business mailboxes (13,127 in all), from the route data stored by EDDM2GO. An EDDM mailing can target any combination of these routes.

What ZIP codes are near 29403?

The closest, measured center to center: 29409 (1 mi, Charleston), 29425 (1.3 mi, Charleston), 29424 (1.4 mi, Charleston), 29401 (2 mi, Charleston), 29407 (3 mi, Charleston) and 29405 (3.9 mi, North Charleston).

29403 ZIP Code, Charleston, SC

29403 is a ZIP code in Charleston, South Carolina in Charleston County. It covers 5.4 square miles of land. The closest ZIP codes are 29409, 29425 and 29424. 22,533 people live here in 10,862 households. At about 4,174 people per square mile it is built up to city-neighborhood density, and most households rent (33% own). Median household income is $66,944, close to the South Carolina median of $69,324; the median age is 30.0, younger than most ZIP codes.

Quick facts

Mailing city: Charleston, SC
County: Charleston County
Land area: 5.4 sq mi
Population: 22,533
Median household income: $66,944
Carrier routes: 18 (12,090 homes)

Key figures

Measure	Value
Residents	22,533
Households	10,862
Median household income	$66,944
Income per person	$49,758
Median age	30
Homeowners	32.9%
Median home value	$674,000
Median rent	$1,798
Bachelor's degree or higher	60.9%
Average commute (minutes)	17.3
Households with kids under 18	12.1%
Moved in the past year	25.3%
Below the poverty line	25.8%
Broadband internet	86.8%
Speak a non-English language at home	4.9%

Household income

% of households	Value
<$10K	8.9%
$10–15K	5.3%
$15–25K	9.5%
$25–35K	7.2%
$35–50K	11.4%
$50–75K	12.1%
$75–100K	8.9%
$100–150K	14.3%
$150–200K	9.7%
$200K+	12.6%

Age

% of all residents	Value
<10	6.8%
10–19	9.1%
20–24	18.5%
25–34	25.4%
35–44	12.5%
45–54	7.1%
55–64	9.8%
65–74	7.3%
75+	3.6%

Tenure

% of housing units	Value
Owned, with mortgage	18.9%
Owned outright	7.9%
Rented	53.9%
Vacant	19.2%

Type of building

% of housing units	Value
Detached house	33.1%
Townhome	5.5%
2–4 units	25.3%
5–19 units	12.4%
20+ units	23.3%
Mobile / other	0.4%

Businesses in 29403

1,020 business establishments with 13,595 employees (ZIP Codes Business Patterns 2023).

Accommodation and Food Services: 191
Professional, Scientific, and Technical Services: 184
Retail Trade: 108
Real Estate and Rental and Leasing: 105
Other Services (except Public Administration): 92
Health Care and Social Assistance: 71
Construction: 52
Finance and Insurance: 45

EDDM carrier routes

29403 has 18 USPS carrier routes with 12,090 residential and 1,038 business mailboxes. Open the EDDM route map.

Carrier routes in 29403

29403 has 18 USPS carrier routes (18 city (C)) with 12,090 residential and 1,038 business mailboxes. Routes range from 346 homes (C027) to 1,194 homes (C033); the median route has 595 homes. The Census counted 10,862 households in 29403 (2020–2024 average); USPS counts current mailboxes, including new and vacant homes.

Homes per route	Routes
1–249	0
250–499	5
500–749	8
750–999	2
1,000–1,499	3
1,500+	0

Best routes in 29403 for…

Most businesses

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

Route C029 — USPS business mailboxes 145, 347 homes
Route C025 — USPS business mailboxes 124, 769 homes
Route C033 — USPS business mailboxes 119, 1,194 homes
Route C016 — USPS business mailboxes 116, 1,187 homes
Route C020 — USPS business mailboxes 107, 1,032 homes

Select these 5 routes on the route map

Every carrier route in 29403

Route	Type	Homes	Businesses	Est. median income	Est. owners	Est. families with kids	Est. moved in past year
C015	City	583	18	$61,649	—	—	—
C016	City	1,187	116	$57,014	—	—	—
C018	City	587	10	$57,393	—	—	—
C019	City	641	22	$30,596	—	—	—
C020	City	1,032	107	$92,256	—	—	—
C021	City	736	92	$116,667	—	—	—
C022	City	656	45	$113,299	—	—	—
C023	City	602	80	$116,667	—	—	—
C024	City	377	1	$104,471	—	—	—
C025	City	769	124	$92,256	—	—	—
C026	City	471	5	$85,625	—	—	—
C027	City	346	12	$30,596	—	—	—
C029	City	347	145	$28,495	—	—	—
C030	City	472	2	$104,471	—	—	—
C031	City	586	43	$38,131	—	—	—
C032	City	916	54	$19,050	—	—	—
C033	City	1,194	119	$57,014	—	—	—
C034	City	588	43	$38,131	—	—	—

Income, owners, families and movers are estimates for each route (how we estimate them); mailbox counts are current USPS figures. Open 29403 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

29409 — Charleston city, SC (1 mi)
29425 — Charleston city, SC (1.3 mi)
29424 — Charleston city, SC (1.4 mi)
29401 — Charleston city, SC (2 mi)
29407 — Charleston city, SC (3 mi)
29405 — North Charleston city, SC (3.9 mi)
29464 — Mount Pleasant town, SC (5.3 mi)
29412 — Charleston city, SC (6.3 mi)

Areas that include 29403

Charleston, SC ZIP codes — 11 ZIP codes
Charleston County ZIP codes — 27 ZIP codes
South Carolina ZIP code data

Where it ranks

Mail every home in 29403

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) 29403, which approximates the USPS ZIP code area. Census figures: American Community Survey 5-year estimates, 2020–2024.

Frequently asked questions

What city is 29403 in?: 29403 is a Charleston, SC mailing address. By land area, 100% lies inside Charleston.
What county is 29403 in?: 29403 is in Charleston County.
What is the population of 29403?: About 22,533 people (±1,398), according to the Census Bureau's American Community Survey 5-year estimates for 2020–2024. The 2020 Census counted 21,363.
What is the median household income in 29403?: $66,944 (±$8,620), compared with $69,324 for South Carolina as a whole. Half the households in the ZIP code earn more and half earn less.
How many carrier routes and mailboxes are in 29403?: 18 USPS carrier routes with 12,090 residential and 1,038 business mailboxes (13,127 in all), from the route data stored by EDDM2GO. An EDDM mailing can target any combination of these routes.
What ZIP codes are near 29403?: The closest, measured center to center: 29409 (1 mi, Charleston), 29425 (1.3 mi, Charleston), 29424 (1.4 mi, Charleston), 29401 (2 mi, Charleston), 29407 (3 mi, Charleston) and 29405 (3.9 mi, North Charleston).

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