St. Clair, Missouri

St. Clair population, 2020 to 2024

St. Clair lost 83 residents from July 2020 to July 2024, a change of -1.7%. In the latest year it moved by -8.

St. Clair covers 4.82 square miles of land, for 985 people per square mile of land. The median Missouri place of 5,000+ has 1,448, so St. Clair is less dense than the typical town.

What county St. Clair is in

All of St. Clair's residents live in Franklin County, which had 107,256 residents in 2024. St. Clair holds 4.4% of the county's population. The shaded shape is on the map above; dots mark the eight nearest places.

ZIP codes in St. Clair

1 ZIP Code Tabulation Area (ZCTA) overlaps St. Clair by at least 10% of the ZCTA's or the city's land: 63077. 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. Clair is

The Census internal point of St. Clair is at 38.346600, -90.993500. Jefferson City, the capital, is 65.8 miles WNW in a straight line. The nearest larger place is Union, MO (13,198 people), 6.3 miles away. The nearest city of 100,000 or more is St. Louis, MO, 45.2 miles away.

Daylight in St. Clair

At 38.35° N, St. Clair gets about 14 h 50 min of daylight around the June solstice and 9 h 30 min around the December solstice, a swing of 5 h 21 min. Figures are sunrise to sunset from the SunCalc model for June 21 and December 21, 2026.

Places near St. Clair

The eight nearest incorporated places of 1,000+ in Missouri, measured between internal points. The closest is Union, 6.3 miles away, with 13,198 people.