What city is 37403 in?

37403 is a Chattanooga, TN mailing address. By land area, 100% lies inside Chattanooga.

What is the population of 37403?

About 6,413 people (±630), according to the Census Bureau's American Community Survey 5-year estimates for 2020–2024. The 2020 Census counted 5,666.

What is the median household income in 37403?

$81,136 (±$42,094), compared with $69,595 for Tennessee as a whole. Half the households in the ZIP code earn more and half earn less.

How many carrier routes and mailboxes are in 37403?

3 USPS carrier routes with 2,397 residential and 387 business mailboxes (2,784 in all), from the route data stored by EDDM2GO. An EDDM mailing can target any combination of these routes.

What ZIP codes are near 37403?

The closest, measured center to center: 37450 (1 mi, Chattanooga), 37402 (1.2 mi, Chattanooga), 37408 (1.6 mi, Chattanooga), 37404 (1.8 mi, Chattanooga), 37407 (3.2 mi, Chattanooga) and 37406 (3.3 mi, Chattanooga).

37403 ZIP Code, Chattanooga, TN

37403 is a ZIP code in Chattanooga, Tennessee in Hamilton County. It covers 1.7 square miles of land. The closest ZIP codes are 37450, 37402 and 37408. 6,413 people live here in 1,990 households. At about 3,761 people per square mile it has suburban density, and most households rent (26% own). Median household income is $81,136, above the Tennessee median of $69,595; the median age is 21.2, younger than most ZIP codes.

Quick facts

Mailing city: Chattanooga, TN
County: Hamilton County
Land area: 1.7 sq mi
Population: 6,413
Median household income: $81,136
Carrier routes: 3 (2,397 homes)

Key figures

Measure	Value
Residents	6,413
Households	1,990
Median household income	$81,136
Income per person	$39,217
Median age	21.2
Homeowners	25.9%
Median home value	$525,200
Median rent	$1,443
Bachelor's degree or higher	55.5%
Average commute (minutes)	15.1
Households with kids under 18	3.7%
Moved in the past year	47.3%
Below the poverty line	23.6%
Broadband internet	89.7%
Speak a non-English language at home	6.6%

Household income

% of households	Value
<$10K	6.3%
$10–15K	5.5%
$15–25K	8.5%
$25–35K	4.6%
$35–50K	7.5%
$50–75K	16.4%
$75–100K	6.3%
$100–150K	22.2%
$150–200K	5.0%
$200K+	17.6%

Age

% of all residents	Value
<10	1.2%
10–19	32.8%
20–24	28.9%
25–34	12.0%
35–44	10.5%
45–54	1.7%
55–64	7.0%
65–74	3.2%
75+	2.6%

Tenure

% of housing units	Value
Owned, with mortgage	13.7%
Owned outright	7.5%
Rented	60.8%
Vacant	17.9%

Type of building

% of housing units	Value
Detached house	13.7%
Townhome	6.4%
2–4 units	6.6%
5–19 units	16.4%
20+ units	56.8%
Mobile / other	0.0%

Businesses in 37403

287 business establishments with 10,200 employees (ZIP Codes Business Patterns 2023).

Health Care and Social Assistance: 55
Professional, Scientific, and Technical Services: 51
Accommodation and Food Services: 30
Other Services (except Public Administration): 30
Information: 21
Finance and Insurance: 21
Retail Trade: 16
Real Estate and Rental and Leasing: 15

EDDM carrier routes

37403 has 3 USPS carrier routes with 2,397 residential and 387 business mailboxes. Open the EDDM route map.

Carrier routes in 37403

37403 has 3 USPS carrier routes (3 city (C)) with 2,397 residential and 387 business mailboxes. Routes range from 560 homes (C001) to 1,097 homes (C008); the median route has 740 homes. The Census counted 1,990 households in 37403 (2020–2024 average); USPS counts current mailboxes, including new and vacant homes.

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

Best routes in 37403 for…

Most businesses

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

Route C008 — USPS business mailboxes 138, 1,097 homes
Route C001 — USPS business mailboxes 128, 560 homes
Route C003 — USPS business mailboxes 121, 740 homes

Select these 3 routes on the route map

Every carrier route in 37403

Route	Type	Homes	Businesses	Est. median income	Est. owners	Est. families with kids	Est. moved in past year
C001	City	560	128	$37,709	—	—	—
C003	City	740	121	$50,077	—	—	—
C008	City	1,097	138	$112,890	—	—	—

Income, owners, families and movers are estimates for each route (how we estimate them); mailbox counts are current USPS figures. Open 37403 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

37450 — Chattanooga city, TN (1 mi)
37402 — Chattanooga city, TN (1.2 mi)
37408 — Chattanooga city, TN (1.6 mi)
37404 — Chattanooga city, TN (1.8 mi)
37407 — Chattanooga city, TN (3.2 mi)
37406 — Chattanooga city, TN (3.3 mi)
37410 — Chattanooga city, TN (3.4 mi)
37409 — Chattanooga city, TN (3.5 mi)

Areas that include 37403

Chattanooga, TN ZIP codes — 18 ZIP codes
Hamilton County ZIP codes — 31 ZIP codes
Tennessee ZIP code data

Where it ranks

Mail every home in 37403

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) 37403, which approximates the USPS ZIP code area. Census figures: American Community Survey 5-year estimates, 2020–2024.

Frequently asked questions

What city is 37403 in?: 37403 is a Chattanooga, TN mailing address. By land area, 100% lies inside Chattanooga.
What county is 37403 in?: 37403 is in Hamilton County.
What is the population of 37403?: About 6,413 people (±630), according to the Census Bureau's American Community Survey 5-year estimates for 2020–2024. The 2020 Census counted 5,666.
What is the median household income in 37403?: $81,136 (±$42,094), compared with $69,595 for Tennessee as a whole. Half the households in the ZIP code earn more and half earn less.
How many carrier routes and mailboxes are in 37403?: 3 USPS carrier routes with 2,397 residential and 387 business mailboxes (2,784 in all), from the route data stored by EDDM2GO. An EDDM mailing can target any combination of these routes.
What ZIP codes are near 37403?: The closest, measured center to center: 37450 (1 mi, Chattanooga), 37402 (1.2 mi, Chattanooga), 37408 (1.6 mi, Chattanooga), 37404 (1.8 mi, Chattanooga), 37407 (3.2 mi, Chattanooga) and 37406 (3.3 mi, Chattanooga).

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