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Zip Code 46373 — Saint John, IN

46373 is a ZIP Code associated with Saint John, IN, located within Lake. The postal region supports an estimated population of 18,843 residents across Data Pending housing units, with a population density of 668.6 people per square mile.

WorldPlaceData database updated: October 2026

📍 View location on OpenStreetMap (41.445780, -87.469540)

Data Metric	Local Statistic
Postal / Zip Code	46373
Primary City	Saint John
State / Province	IN
County	Lake
Total Population	18,843
Median Household Income	Data Pending
Total Housing Units	Data Pending
Population Density	668.6 people/sq mi
Timezone	America/Chicago

How 46373 Compares

Metric	ZIP 46373	Lake County	IN State Average
Population	18,843	504,725	6,851,073
Median Income	Data Pending	N/A	N/A
Population Density	668.6 /sq mi	--	--

Nearby ZIP Codes

ZIP Code	City	Distance	Population	Median Income
Zip 46311	Dyer	2.6 mi	23,321	N/A
Zip 46375	Schererville	3.3 mi	24,188	N/A
Zip 46303	Cedar Lake	5.1 mi	17,680	N/A
Zip 46319	Griffith	5.8 mi	17,847	N/A
Zip 46322	Highland	7.1 mi	23,680	N/A

Data Sources & Methodology: Geographic coordinates and ZIP Code assignments are derived from underlying geographic and postal datasets. Note that ZIP Codes are USPS postal delivery areas, while Census ZCTAs are statistical approximation areas. Read full methodology →