St. John, Indiana

St. John population, 2020 to 2024

St. John added 3,728 residents from July 2020 to July 2024, a change of +18.2%. In the latest year it moved by +621. Among 126 Indiana places of 5,000 or more, that growth ranks 7th; the median place changed by +1.0%. The median place of 5,000+ in Indiana has 14,565 people, so St. John is 1.7 times that size.

St. John covers 12.74 square miles of land and 0.09 of water, for 1,903 people per square mile of land. The median Indiana place of 5,000+ has 1,645, so St. John is denser than the typical town.

What county St. John is in

All of St. John's residents live in Lake County, which had 502,955 residents in 2024. St. John holds 4.8% of the county's population. The shaded shape is on the map above; dots mark the eight nearest places.

ZIP codes in St. John

2 ZIP Code Tabulation Areas (ZCTAs) overlap St. John by at least 10% of the ZCTA's or the town's land: 46311, 46373. ZCTAs are Census approximations of USPS ZIP code delivery areas. The list comes from the 2020 ZCTA to place relationship file, so a town that annexed land after 2020 may reach into ZIP codes not listed here.

Where St. John is

The Census internal point of St. John is at 41.441800, -87.467800. Indianapolis, the capital, is 134.5 miles SSE in a straight line. The nearest larger place is Schererville, IN (29,780 people), 3.2 miles away. The nearest city of 100,000 or more is Chicago, IL, 29.5 miles away.

Daylight in St. John

At 41.44° N, St. John gets about 15 h 11 min of daylight around the June solstice and 9 h 11 min around the December solstice, a swing of 6 h 00 min. Figures are sunrise to sunset from the SunCalc model for June 21 and December 21, 2026.

Places near St. John

The eight nearest incorporated places of 1,000+ in Indiana, measured between internal points. The closest is Schererville, 3.3 miles away, with 29,780 people.