Illinois · Census place 1738115
Jacksonville, Illinois
Jacksonville is a city in Morgan County, Illinois with an estimated 17,801 residents on July 1, 2024. It is the 145th largest of 651 incorporated places of 1,000+ people in the state.
- Population 2024
- 17,801
- #145 of 651 in Illinois
- Change since 2020
- -2.4%
- -444 people
- Land area
- 10.6 sq mi
- + 0.20 sq mi water
- Density
- 1,686 / sq mi
- State median 2,177
Measure from here
Tools and pages that start from Jacksonville
Jacksonville population, 2020 to 2024
Jacksonville lost 444 residents from July 2020 to July 2024, a change of -2.4%. In the latest year it moved by -84. Among 330 Illinois places of 5,000 or more, that growth ranks 247th; the median place changed by -0.9%. The median place of 5,000+ in Illinois has 14,760 people, so Jacksonville is 1.2 times that size.
Jacksonville covers 10.56 square miles of land and 0.20 of water, for 1,686 people per square mile of land. The median Illinois place of 5,000+ has 2,177, so Jacksonville is less dense than the typical town.
What county Jacksonville is in
All of Jacksonville's residents live in Morgan County, which had 32,618 residents in 2024. Jacksonville holds 54.6% of the county's population. The shaded shape is on the map above; dots mark the eight nearest places.
ZIP codes in Jacksonville
1 ZIP Code Tabulation Area (ZCTA) overlaps Jacksonville by at least 10% of the ZCTA's or the city's land: 62650. 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 Jacksonville is
The Census internal point of Jacksonville is at 39.729200, -90.232200. Springfield, the capital, is 31.1 miles E in a straight line. The nearest larger place is Springfield, IL (112,949 people), 31.5 miles away.
Internal point
- Decimal
- 39.729200, -90.232200
- DMS
- 39°43'45.12"N 90°13'55.92"W
- UTM
- 15N 737206.3E 4401365.3N
- Geohash
- 9zpf48qzm
- Plus code
- 86FFPQH9+M4
Daylight in Jacksonville
At 39.73° N, Jacksonville gets about 14 h 59 min of daylight around the June solstice and 9 h 21 min around the December solstice, a swing of 5 h 38 min. Figures are sunrise to sunset from the SunCalc model for June 21 and December 21, 2026.
Places near Jacksonville
The eight nearest incorporated places of 1,000+ in Illinois, measured between internal points. The closest is South Jacksonville, 2.1 miles away, with 3,197 people.
Questions people ask
What is the population of Jacksonville, IL?
17,801 on July 1, 2024, in the Census Vintage 2024 estimates. That is down 444 (2.4%) from 18,245 in July 2020.
What county is Jacksonville in?
Morgan County. All of its residents live in that county.
What ZIP codes cover Jacksonville?
1 ZIP Code Tabulation Area overlaps it by at least 10% of either area: 62650.
How far is Jacksonville from Springfield?
31.1 miles (50.1 km) in a straight line, heading E from Jacksonville.
What is the nearest larger city to Jacksonville?
Springfield, IL, with 112,949 residents, 31.5 miles away between internal points.
Sources and data as of
Data as of: Census Vintage 2024 subcounty estimates (July 1, 2024), 2024 Gazetteer places, 2020 ZCTA to place relationship file.
- 01Census Vintage 2024 subcounty population estimates
- 02Census 2024 Gazetteer, places
- 03Census 2020 ZCTA to place relationship file
- 04Census 2024 cartographic boundary file, counties (1:5,000,000)
How every number is computed: methodology. Spotted a wrong figure? Report an error.