St. John, Missouri

St. John population, 2020 to 2024

St. John lost 156 residents from July 2020 to July 2024, a change of -2.4%. In the latest year it moved by -7. Among 135 Missouri places of 5,000 or more, that growth ranks 127th; the median place changed by +1.2%. The median place of 5,000+ in Missouri has 12,239 people, so St. John is 53% of it.

St. John covers 1.42 square miles of land, for 4,558 people per square mile of land. The median Missouri place of 5,000+ has 1,448, so St. John is denser than the typical town.

What county St. John is in

All of St. John's residents live in St. Louis County, which had 992,929 residents in 2024. St. John holds 0.7% of the county's population. The shaded shape is on the map above; dots mark the eight nearest places.

ZIP codes in St. John

1 ZIP Code Tabulation Area (ZCTA) overlaps St. John by at least 10% of the ZCTA's or the city's land: 63114. ZCTAs are Census approximations of USPS ZIP code delivery areas. The list comes from the 2020 ZCTA to place relationship file, so a city 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 38.714800, -90.346300. Jefferson City, the capital, is 99.0 miles W in a straight line. The nearest larger place is Overland, MO (15,547 people), 1.7 miles away. The nearest city of 100,000 or more is St. Louis, MO, 7.8 miles away.

Daylight in St. John

At 38.71° N, St. John gets about 14 h 53 min of daylight around the June solstice and 9 h 27 min around the December solstice, a swing of 5 h 25 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 Missouri, measured between internal points. The closest is Charlack, 0.8 miles away, with 1,280 people.