Zip Code 46373 — Saint John, IN

ZIP Code 46373 is associated with Saint John, IN, in Lake County. The listed population estimate is 18,843; estimated density is 668.6 people per square mile. Among records with population estimates, it ranks #12 of 27 in Lake County and #136 of 788 in IN.
Page generated: 2026-10-08. This is not the source data release date.

📍 View location on OpenStreetMap (41.445780, -87.469540)

Data MetricLocal Statistic
Postal / Zip Code46373
Primary CitySaint John
State / ProvinceIN
CountyLake
Total Population18,843
Population Density668.6 people/sq mi
TimezoneAmerica/Chicago

How 46373 Compares

MetricZIP 46373Lake County recordsIN records
Population estimate18,843504,725 (sum)6,851,073 (sum)
Population Density668.6 /sq mi----
County population rank#12 of 27----
State population rank#136 of 788----

Regional sums combine the population estimates in the listed ZIP records; they are not official county or state population totals.

Explore More ZIP Codes

Nearby ZIP Codes in IN

ZIP CodeCityDistancePopulation estimate
ZIP 46311Dyer2.6 mi23,321
ZIP 46375Schererville3.3 mi24,188
ZIP 46303Cedar Lake5.1 mi17,680
ZIP 46319Griffith5.8 mi17,847
ZIP 46322Highland7.1 mi23,680

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 →