Salem, Illinois

Salem population, 2020 to 2024

Salem lost 258 residents from July 2020 to July 2024, a change of -3.5%. In the latest year it moved by -42. Among 330 Illinois places of 5,000 or more, that growth ranks 326th; the median place changed by -0.9%. The median place of 5,000+ in Illinois has 14,760 people, so Salem is 48% of it.

Salem covers 6.99 square miles of land and 0.16 of water, for 1,004 people per square mile of land. The median Illinois place of 5,000+ has 2,177, so Salem is less dense than the typical town.

What county Salem is in

All of Salem's residents live in Marion County, which had 36,437 residents in 2024. Salem holds 19.3% of the county's population. The shaded shape is on the map above; dots mark the eight nearest places.

ZIP codes in Salem

1 ZIP Code Tabulation Area (ZCTA) overlaps Salem by at least 10% of the ZCTA's or the city's land: 62881. 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 Salem is

The Census internal point of Salem is at 38.627500, -88.959400. Springfield, the capital, is 87.9 miles NNW in a straight line. The nearest larger place is Centralia, IL (11,787 people), 11.5 miles away. The nearest city of 100,000 or more is St. Louis, MO, 69.3 miles away.

Daylight in Salem

At 38.63° N, Salem gets about 14 h 52 min of daylight around the June solstice and 9 h 28 min around the December solstice, a swing of 5 h 24 min. Figures are sunrise to sunset from the SunCalc model for June 21 and December 21, 2026.

Places near Salem

The eight nearest incorporated places of 1,000+ in Illinois, measured between internal points. The closest is Sandoval, 8.7 miles away, with 1,125 people.