Big Grove Township, Johnson County, Iowa
Big Grove Township is a township in Johnson County, Iowa. About 4,864 people live there (2020–2024 estimate). It covers 30.7 sq mi (79.6 km²) of land and uses Central Time. Its local government works under another unit of government.
- Population, 2020–2024 estimate
- 4,864 ± 452
- County
- Johnson County
- School district
- Solon Community School District
- Land area
- 30.7 sq mi (79.6 km²)
- Type
- TownshipGovernment under another
- Time zone
- Central TimeUTC-06:00 in January; UTC-05:00 in July
- Median household income
- $125,063 ± $18,079
- Median home value
- $356,000 ± $35,388
- Water area
- 2.68 sq mi (6.94 km²)
- State
- Iowa
- Census code (GEOID)
- 1910390240
- Coordinates (central point)
- 41.815165, -91.534588
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.
Census place in Big Grove Township
- Solon (city)3,152 people
This place’s central point lies inside Big Grove Township. A place can reach across the line, and its government, if it has one, can be separate from the township’s.
Bordering areas, nearest first
- Penn Township5.5 mi southwest
- Cedar Township5.5 mi east
- Putnam Township, Linn County5.6 mi north
- Newport Township6.1 mi south
- Jefferson Township6.3 mi west
These towns, townships, cities and boroughs share a boundary with Big Grove Township. Distances are straight lines between central points, not driving distances.
Other townships in Johnson County, largest first
- Penn Township31,822 people
- West Lucas Township10,251 people
- Clear Creek Township10,095 people
- Madison Township4,645 people
- Jefferson Township4,334 people
- Newport Township1,988 people
- Scott Township1,941 people
- Oxford Township1,811 people
- Fremont Township1,631 people
- Sharon Township1,625 people
- Liberty Township1,401 people
- Washington Township1,005 people
All 20
- Graham Township645 people
- Monroe Township643 people
- Union Township586 people
- Cedar Township526 people
- Hardin Township382 people
- East Lucas Township368 people
- Lincoln Township174 people
- Pleasant Valley Township150 people
People counts are American Community Survey 2020–2024 5-year estimates. See Johnson County for its cities, ZIP Code areas and county seat.
Sunrise and sunset in Big Grove Township
- Longest day
- 15 hours 13 minutes around June 21
- Shortest day
- 9 hours 8 minutes around December 21
- Earliest sunrise
- 5:30 AM around June 15
- Latest sunrise
- 7:44 AM the day before clocks go back in November
- Earliest sunset
- 4:35 PM around December 8
- Latest sunset
- 8:45 PM around June 27
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 | 7:31 AM | 5:00 PM | 9 h 29 min |
| Feb 15 | 7:01 AM | 5:39 PM | 10 h 38 min |
| Mar 15 | 7:18 AM | 7:12 PM | 11 h 54 min |
| Apr 15 | 6:26 AM | 7:46 PM | 13 h 20 min |
| May 15 | 5:46 AM | 8:19 PM | 14 h 33 min |
| Jun 15 | 5:30 AM | 8:42 PM | 15 h 12 min |
| Jul 15 | 5:44 AM | 8:39 PM | 14 h 55 min |
| Aug 15 | 6:14 AM | 8:06 PM | 13 h 52 min |
| Sep 15 | 6:46 AM | 7:15 PM | 12 h 29 min |
| Oct 15 | 7:18 AM | 6:24 PM | 11 h 6 min |
| Nov 15 | 6:55 AM | 4:45 PM | 9 h 50 min |
| Dec 15 | 7:26 AM | 4:36 PM | 9 h 10 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 Johnson County or the local office.
Find the township or town where you are now or find your county.