Johnston City, Illinois

Johnston City population, 2020 to 2024

Johnston City lost 70 residents from July 2020 to July 2024, a change of -2.1%. In the latest year it moved by +1.

Johnston City covers 2.12 square miles of land and 0.06 of water, for 1,561 people per square mile of land. The median Illinois place of 5,000+ has 2,177, so Johnston City is less dense than the typical town.

What county Johnston City is in

All of Johnston City's residents live in Williamson County, which had 67,064 residents in 2024. Johnston City holds 4.9% of the county's population. The shaded shape is on the map above; dots mark the eight nearest places.

ZIP codes in Johnston City

1 ZIP Code Tabulation Area (ZCTA) overlaps Johnston City by at least 10% of the ZCTA's or the city's land: 62951. 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 Johnston City is

The Census internal point of Johnston City is at 37.821000, -88.929300. Springfield, the capital, is 140.9 miles NNW in a straight line. The nearest larger place is West Frankfort, IL (7,131 people), 5.4 miles away. The nearest city of 100,000 or more is Evansville, IN, 76.9 miles away.

Daylight in Johnston City

At 37.82° N, Johnston City gets about 14 h 47 min of daylight around the June solstice and 9 h 33 min around the December solstice, a swing of 5 h 15 min. Figures are sunrise to sunset from the SunCalc model for June 21 and December 21, 2026.

Places near Johnston City

The eight nearest incorporated places of 1,000+ in Illinois, measured between internal points. The closest is West Frankfort, 5.4 miles away, with 7,131 people.