What city is 46373 in?

46373 is a Saint John, IN mailing address. By land area, 91% lies inside St. John and 2% lies inside Schererville; the rest is outside any Census-defined city or community.

What is the population of 46373?

About 18,843 people (±919), according to the Census Bureau's American Community Survey 5-year estimates for 2020–2024. The 2020 Census counted 17,839.

What is the median household income in 46373?

$127,146 (±$12,575), compared with $71,957 for Indiana as a whole. Half the households in the ZIP code earn more and half earn less.

How many carrier routes and mailboxes are in 46373?

12 USPS carrier routes with 7,611 residential and 336 business mailboxes (7,947 in all), from the route data stored by EDDM2GO. An EDDM mailing can target any combination of these routes.

What ZIP codes are near 46373?

The closest, measured center to center: 46311 (2.8 mi, Dyer), 46375 (3.5 mi, Schererville), 46303 (4.7 mi, Cedar Lake), 46319 (6 mi, Griffith), 60417 (6.2 mi, Crete) and 46322 (7.3 mi, Highland).

46373 ZIP Code, Saint John, IN

46373 is a ZIP code in Saint John, Indiana in Lake County. It covers 11 square miles of land. The closest ZIP codes are 46311, 46375 and 46303. 18,843 people live here in 6,658 households. At about 1,732 people per square mile it has suburban density, and most homes are owner-occupied (97%). Median household income is $127,146, well above the Indiana median of $71,957.

Quick facts

Mailing city: Saint John, IN
County: Lake County
Land area: 11 sq mi
Population: 18,843
Median household income: $127,146
Carrier routes: 12 (7,611 homes)

Key figures

Measure	Value
Residents	18,843
Households	6,658
Median household income	$127,146
Income per person	$56,346
Median age	44.4
Homeowners	97.1%
Median home value	$408,900
Median rent	$981
Bachelor's degree or higher	42.5%
Average commute (minutes)	30.9
Households with kids under 18	34.6%
Moved in the past year	4.9%
Below the poverty line	2.8%
Broadband internet	93.3%
Speak a non-English language at home	10.7%

Household income

% of households	Value
<$10K	2.8%
$10–15K	0.2%
$15–25K	2.4%
$25–35K	3.2%
$35–50K	9.1%
$50–75K	9.1%
$75–100K	11.0%
$100–150K	17.7%
$150–200K	15.1%
$200K+	29.3%

Age

% of all residents	Value
<10	9.4%
10–19	15.4%
20–24	6.1%
25–34	7.1%
35–44	12.4%
45–54	14.9%
55–64	14.0%
65–74	12.4%
75+	8.0%

Tenure

% of housing units	Value
Owned, with mortgage	67.4%
Owned outright	28.6%
Rented	2.7%
Vacant	1.3%

Type of building

% of housing units	Value
Detached house	85.8%
Townhome	10.9%
2–4 units	1.5%
5–19 units	0.3%
20+ units	0.8%
Mobile / other	0.7%

Businesses in 46373

402 business establishments with 3,891 employees (ZIP Codes Business Patterns 2023).

Construction: 61
Health Care and Social Assistance: 50
Retail Trade: 47
Professional, Scientific, and Technical Services: 40
Finance and Insurance: 35
Other Services (except Public Administration): 35
Accommodation and Food Services: 29
Real Estate and Rental and Leasing: 24

EDDM carrier routes

46373 has 12 USPS carrier routes with 7,611 residential and 336 business mailboxes. Open the EDDM route map.

Carrier routes in 46373

46373 has 12 USPS carrier routes (12 rural (R)) with 7,611 residential and 336 business mailboxes. Routes range from 518 homes (R003) to 707 homes (R008); the median route has 641 homes. The Census counted 6,658 households in 46373 (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	0
1,000–1,499	0
1,500+	0

Best routes in 46373 for…

Most businesses

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

Route R012 — USPS business mailboxes 160, 535 homes
Route R003 — USPS business mailboxes 133, 518 homes
Route R009 — USPS business mailboxes 15, 695 homes
Route R002 — USPS business mailboxes 11, 638 homes
Route R005 — USPS business mailboxes 8, 643 homes

Select these 5 routes on the route map

Every carrier route in 46373

Route	Type	Homes	Businesses	Est. median income	Est. owners	Est. families with kids	Est. moved in past year
R001	Rural	606	0	$78,184	—	—	—
R002	Rural	638	11	$144,542	—	—	—
R003	Rural	518	133	$101,873	—	—	—
R004	Rural	671	1	$101,233	—	—	—
R005	Rural	643	8	$144,542	—	—	—
R006	Rural	618	0	$116,793	—	—	—
R007	Rural	629	0	$128,161	—	—	—
R008	Rural	707	1	$131,209	—	—	—
R009	Rural	695	15	$131,209	—	—	—
R011	Rural	696	3	$153,250	—	—	—
R012	Rural	535	160	$144,542	—	—	—
R013	Rural	655	4	$131,209	—	—	—

Income, owners, families and movers are estimates for each route (how we estimate them); mailbox counts are current USPS figures. Open 46373 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

46311 — Dyer town, IN (2.8 mi)
46375 — Schererville town, IN (3.5 mi)
46303 — Cedar Lake town, IN (4.7 mi)
46319 — Griffith town, IN (6 mi)
60417 — Crete village, IL (6.2 mi)
46322 — Highland town, IN (7.3 mi)
46410 — Merrillville town, IN (7.4 mi)
46321 — Munster town, IN (7.5 mi)

Areas that include 46373

Where it ranks

Mail every home in 46373

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) 46373, which approximates the USPS ZIP code area. Census figures: American Community Survey 5-year estimates, 2020–2024.

Frequently asked questions

What city is 46373 in?: 46373 is a Saint John, IN mailing address. By land area, 91% lies inside St. John and 2% lies inside Schererville; the rest is outside any Census-defined city or community.
What county is 46373 in?: 46373 is in Lake County.
What is the population of 46373?: About 18,843 people (±919), according to the Census Bureau's American Community Survey 5-year estimates for 2020–2024. The 2020 Census counted 17,839.
What is the median household income in 46373?: $127,146 (±$12,575), compared with $71,957 for Indiana as a whole. Half the households in the ZIP code earn more and half earn less.
How many carrier routes and mailboxes are in 46373?: 12 USPS carrier routes with 7,611 residential and 336 business mailboxes (7,947 in all), from the route data stored by EDDM2GO. An EDDM mailing can target any combination of these routes.
What ZIP codes are near 46373?: The closest, measured center to center: 46311 (2.8 mi, Dyer), 46375 (3.5 mi, Schererville), 46303 (4.7 mi, Cedar Lake), 46319 (6 mi, Griffith), 60417 (6.2 mi, Crete) and 46322 (7.3 mi, Highland).

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