Brookside Township, Clinton County, Illinois
Brookside Township is a township in Clinton County, Illinois. About 4,413 people live there (2020–2024 estimate). It covers 24.3 sq mi (63 km²) of land and uses Central Time. It has its own local government.
- Population, 2020–2024 estimate
- 4,413 ± 29
- County
- Clinton County
- School district
- Centralia High School District 2009–12 · high school
- Land area
- 24.3 sq mi (63 km²)
- Type
- TownshipIts own local government
- Time zone
- Central TimeUTC-06:00 in January; UTC-05:00 in July
- Median household income
- $44,875 ± $5,505
- Median home value
- $94,600 ± $5,152
- Water area
- 0 sq mi (0 km²)
- State
- Illinois
- Census code (GEOID)
- 1702708732
- Coordinates (central point)
- 38.531735, -89.221716
These coordinates mark a central point for the area, not a street address. Population, income and home value: U.S. Census Bureau, American Community Survey 2020–2024 5-year estimates, ± margin at 90% confidence; checked on October 20, 2026.
Bordering areas, nearest first
- Meridian Township5.3 mi north
- Lake Township5.5 mi west
- Irvington Township, Washington County5.8 mi south
- Centralia Township, Marion County7.7 mi east
These towns, townships, cities and boroughs share a boundary with Brookside Township. Distances are straight lines between central points, not driving distances.
Other townships in Clinton County, largest first
- Sugar Creek Township6,689 people
- Looking Glass Township6,441 people
- Breese Township5,539 people
- Carlyle Township3,798 people
- Germantown Township2,322 people
- Wade Township1,601 people
- St. Rose Township1,524 people
- Santa Fe Township1,371 people
- Lake Township804 people
- Irishtown Township785 people
- Meridian Township471 people
- Clement Township458 people
All 14
- Wheatfield Township386 people
- East Fork Township352 people
People counts are American Community Survey 2020–2024 5-year estimates. See Clinton County for its cities, ZIP Code areas and county seat.
Sunrise and sunset in Brookside Township
- Longest day
- 14 hours 52 minutes around June 21
- Shortest day
- 9 hours 29 minutes around December 21
- Earliest sunrise
- 5:32 AM around June 14
- Latest sunrise
- 7:28 AM the day before clocks go back in November
- Earliest sunset
- 4:35 PM around December 7
- Latest sunset
- 8:25 PM around June 28
Clocks go forward an hour on the second Sunday in March and back on the first Sunday in November, so sunrise and sunset jump an hour later in March and an hour earlier in November.
| Day | Sunrise | Sunset | Daylight |
|---|---|---|---|
| Jan 15 | 7:13 AM | 4:59 PM | 9 h 46 min |
| Feb 15 | 6:47 AM | 5:34 PM | 10 h 47 min |
| Mar 15 | 7:08 AM | 7:03 PM | 11 h 55 min |
| Apr 15 | 6:21 AM | 7:33 PM | 13 h 12 min |
| May 15 | 5:45 AM | 8:01 PM | 14 h 16 min |
| Jun 15 | 5:32 AM | 8:22 PM | 14 h 50 min |
| Jul 15 | 5:44 AM | 8:20 PM | 14 h 36 min |
| Aug 15 | 6:11 AM | 7:51 PM | 13 h 40 min |
| Sep 15 | 6:38 AM | 7:05 PM | 12 h 27 min |
| Oct 15 | 7:05 AM | 6:18 PM | 11 h 13 min |
| Nov 15 | 6:38 AM | 4:43 PM | 10 h 5 min |
| Dec 15 | 7:07 AM | 4:36 PM | 9 h 29 min |
Approximate times for a flat horizon at the central point; the days move by a day or so from year to year. Hills and weather can change what you see.
Before using this answer on a form
A township line is not always the line on your mail: a mailing address can name another town or post office, and school districts, ZIP Codes and tax districts follow their own lines. For taxes, voting or permits, check the full address with Clinton County or the local office.
Find the township or town where you are now or find your county.