Illinois · Census place 1775172

Thomson, Illinois

Thomson is a village in Carroll County, Illinois with an estimated 1,595 residents on July 1, 2024. It is the 523rd largest of 651 incorporated places of 1,000+ people in the state.

Population 2024
1,595
#523 of 651 in Illinois
Change since 2020
-1.0%
-16 people
Land area
2.2 sq mi
Density
718 / sq mi
State median 2,177
Orange pin: Thomson. Shaded: its county. Dark pin: Springfield.

Measure from here

Tools and pages that start from Thomson

Thomson population, 2020 to 2024

Thomson lost 16 residents from July 2020 to July 2024, a change of -1.0%. In the latest year it moved by -4.

1,61120201,61020211,60320221,59920231,5952024
July 1 estimates. The April 2020 estimates base was 1,612. The axis starts above zero so yearly changes are visible.

Thomson covers 2.22 square miles of land, for 718 people per square mile of land. The median Illinois place of 5,000+ has 2,177, so Thomson is less dense than the typical town.

What county Thomson is in

All of Thomson's residents live in Carroll County, which had 15,444 residents in 2024. Thomson holds 10.3% of the county's population. The shaded shape is on the map above; dots mark the eight nearest places.

ZIP codes in Thomson

1 ZIP Code Tabulation Area (ZCTA) overlaps Thomson by at least 10% of the ZCTA's or the village's land: 61285. ZCTAs are Census approximations of USPS ZIP code delivery areas. The list comes from the 2020 ZCTA to place relationship file, so a village that annexed land after 2020 may reach into ZIP codes not listed here.

Where Thomson is

The Census internal point of Thomson is at 41.974700, -90.112200. Springfield, the capital, is 153.5 miles S in a straight line. The nearest larger place is Fulton, IL (3,581 people), 8.0 miles away. The nearest city of 100,000 or more is Davenport, IA, 38.4 miles away.

Internal point

Decimal
41.974700, -90.112200
DMS
41°58'28.92"N 90°06'43.92"W
UTM
15N 739266.3E 4651001.7N
Geohash
9zryv3q23
Plus code
86HFXVFQ+V4

Daylight in Thomson

At 41.97° N, Thomson gets about 15 h 14 min of daylight around the June solstice and 9 h 07 min around the December solstice, a swing of 6 h 07 min. Figures are sunrise to sunset from the SunCalc model for June 21 and December 21, 2026.

Places near Thomson

The eight nearest incorporated places of 1,000+ in Illinois, measured between internal points. The closest is Fulton, 7.9 miles away, with 3,581 people.

Questions people ask

What is the population of Thomson, IL?

1,595 on July 1, 2024, in the Census Vintage 2024 estimates. That is down 16 (1.0%) from 1,611 in July 2020.

What county is Thomson in?

Carroll County. All of its residents live in that county.

What ZIP codes cover Thomson?

1 ZIP Code Tabulation Area overlaps it by at least 10% of either area: 61285.

How far is Thomson from Springfield?

153.5 miles (247.0 km) in a straight line, heading S from Thomson.

What is the nearest larger city to Thomson?

Fulton, IL, with 3,581 residents, 8.0 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.

  1. 01Census Vintage 2024 subcounty population estimates
  2. 02Census 2024 Gazetteer, places
  3. 03Census 2020 ZCTA to place relationship file
  4. 04Census 2024 cartographic boundary file, counties (1:5,000,000)

How every number is computed: methodology. Spotted a wrong figure? Report an error.