St. John, IN ZIP Codes
2 ZIP codes serve St. John, Indiana: 46311 and 46373. Together they are home to 42,164 residents in 15,493 households. That is more than the 22,567 people counted inside St. John town limits, because these ZIP codes reach past its boundary. Median household income ranges from $116,652 in 46311 to $127,146 in 46373.
St. John town limits (Census)
| Measure | Census figure |
|---|---|
| Residents | 22,567 |
| Households | 7,844 |
| Median household income | $131,467 |
| Median home value | $406,300 |
| Median age | 42.3 |
| Median rent | $989 |
All 2 ZIP codes together
| Measure | Value |
|---|---|
| Residents (sum of ZIP codes) | 42,164 |
| Households (sum of ZIP codes) | 15,493 |
| Median household income, range across ZIP codes | $116,652 (46311) to $127,146 (46373) |
| Household-weighted average of ZIP medians (an approximation, not a true median) | $121,162 |
| Homeowners | 93.1% |
| Households with kids under 18 | 32.7% |
| Moved in the past year | 5.9% |
| Carrier routes in EDDM2GO's route library | 27 routes, 16,989 homes (2 of 2 ZIP codes) |
Top facts
- Highest median household income in St. John: 46373 ($127,146)
- Most residents: 46311 (23,321 people)
- Highest homeownership: 46373 (97.1% own their home)
- Most households with kids: 46373 (34.6% of households)
- Most new movers: 46311 (6.7% moved in last year)
- Youngest median age: 46311 (43.7 years)
- Highest median home value: 46373 ($408,900)
Every ZIP code in St. John
| ZIP | Mailing city | Residents | Households | Median income | Home value | Homeowners | With kids | New movers | Carrier routes | Mailboxes | Why listed |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 46311 | Dyer | 23,321 | 8,835 | $116,652 | $331,600 | 90.1% | 31.3% | 6.7% | 15 | 9,793 | 12% of its land |
| 46373 | Saint John | 18,843 | 6,658 | $127,146 | $408,900 | 97.1% | 34.6% | 4.9% | 12 | 7,947 | 91% of its land |
A ZIP code is listed for St. John when at least 10% of its land lies inside St. John town limits, when it holds at least 10% of the place's land, or when its USPS mailing city is St. John. The table shows which applies. Totals add up whole ZIP codes, so they include any parts outside St. John.
Counties
- Lake County — 28 ZIP codes
Nearby cities sharing these ZIP codes
- Dyer — 1 ZIP code
Price a mailing to St. John ZIP codes
EDDM guides
Pick carrier routes on the EDDM route map
Frequently asked questions
- What ZIP codes are in St. John, IN?
- 46311 and 46373. A ZIP code is listed for St.
- What is the population of St. John, IN?
- The Census Bureau counts 22,567 residents inside St. John town limits (ACS 2020–2024). The 2 ZIP codes that serve St. John hold 42,164 residents in all.
- What is the median household income in St. John, IN?
- $131,467 inside St. John town limits, per the Census Bureau. Across its ZIP codes the medians run from $116,652 to $127,146.
- Which St. John ZIP code has the highest median household income?
- 46373, at $127,146, among ZIP codes with at least 1,000 residents.
- How many carrier routes and mailboxes are in St. John, IN?
- For the 2 of 2 ZIP codes in EDDM2GO's stored route library: 27 carrier routes reaching 16,989 residential and 748 business mailboxes.
This product uses the Census Bureau Data API but is not endorsed or certified by the Census Bureau.