St. Peters, Missouri

St. Peters population, 2020 to 2024

St. Peters added 3,691 residents from July 2020 to July 2024, a change of +6.4%. In the latest year it moved by +1,798. Among 135 Missouri places of 5,000 or more, that growth ranks 31st; the median place changed by +1.2%. The median place of 5,000+ in Missouri has 12,239 people, so St. Peters is 5.0 times that size.

St. Peters covers 22.51 square miles of land, for 2,728 people per square mile of land. The median Missouri place of 5,000+ has 1,448, so St. Peters is denser than the typical town.

What county St. Peters is in

All of St. Peters's residents live in St. Charles County, which had 423,726 residents in 2024. St. Peters holds 14.5% of the county's population. The shaded shape is on the map above; dots mark the eight nearest places.

ZIP codes in St. Peters

2 ZIP Code Tabulation Areas (ZCTAs) overlap St. Peters by at least 10% of the ZCTA's or the city's land: 63304, 63376. 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. Peters is

The Census internal point of St. Peters is at 38.783500, -90.605100. Jefferson City, the capital, is 85.7 miles W in a straight line. The nearest larger place is St. Charles, MO (72,458 people), 4.9 miles away. The nearest city of 100,000 or more is St. Louis, MO, 21.9 miles away.

Daylight in St. Peters

At 38.78° N, St. Peters 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 26 min. Figures are sunrise to sunset from the SunCalc model for June 21 and December 21, 2026.

Places near St. Peters

The eight nearest incorporated places of 1,000+ in Missouri, measured between internal points. The closest is Cottleville, 3.6 miles away, with 6,378 people.