Rock Township, Lyon County, Iowa
Rock Township is a township in Lyon County, Iowa. About 3,297 people live there (2020–2024 estimate). It covers 35.6 sq mi (92.1 km²) of land and uses Central Time. Its local government works under another unit of government.
- Population, 2020–2024 estimate
- 3,297 ± 390
- County
- Lyon County
- School district
- Central Lyon Community School District
- Land area
- 35.6 sq mi (92.1 km²)
- Type
- TownshipGovernment under another
- Time zone
- Central TimeUTC-06:00 in January; UTC-05:00 in July
- Median household income
- $72,198 ± $5,938
- Median home value
- $227,700 ± $15,344
- Water area
- 0.01 sq mi (0.02 km²)
- State
- Iowa
- Census code (GEOID)
- 1911993660
- Coordinates (central point)
- 43.379423, -96.160378
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 Rock Township
- Rock Rapids (city)2,661 people
This place’s central point lies inside Rock 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
- Garfield Township5.4 mi south
- Cleveland Township5.7 mi west
- Riverside Township6.4 mi north
- Liberal Township6.6 mi east
These towns, townships, cities and boroughs share a boundary with Rock Township. Distances are straight lines between central points, not driving distances.
Other townships in Lyon County, largest first
- Larchwood Township1,617 people
- Richland Township1,108 people
- Wheeler Township1,056 people
- Doon Township1,018 people
- Elgin Township532 people
- Lyon Township454 people
- Riverside Township410 people
- Logan Township400 people
- Liberal Township386 people
- Sioux Township377 people
- Centennial Township289 people
- Garfield Township264 people
All 17
- Allison Township250 people
- Grant Township232 people
- Cleveland Township223 people
- Dale Township155 people
- Midland Township94 people
People counts are American Community Survey 2020–2024 5-year estimates. See Lyon County for its cities, ZIP Code areas and county seat.
Sunrise and sunset in Rock Township
- Longest day
- 15 hours 24 minutes around June 21
- Shortest day
- 8 hours 58 minutes around December 21
- Earliest sunrise
- 5:43 AM around June 15
- Latest sunrise
- 8:06 AM the day before clocks go back in November
- Earliest sunset
- 4:48 PM around December 9
- Latest sunset
- 9:09 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 | 7:54 AM | 5:14 PM | 9 h 20 min |
| Feb 15 | 7:22 AM | 5:55 PM | 10 h 33 min |
| Mar 15 | 7:36 AM | 7:30 PM | 11 h 54 min |
| Apr 15 | 6:42 AM | 8:07 PM | 13 h 25 min |
| May 15 | 6:00 AM | 8:42 PM | 14 h 42 min |
| Jun 15 | 5:43 AM | 9:06 PM | 15 h 23 min |
| Jul 15 | 5:57 AM | 9:03 PM | 15 h 6 min |
| Aug 15 | 6:29 AM | 8:27 PM | 13 h 58 min |
| Sep 15 | 7:04 AM | 7:34 PM | 12 h 30 min |
| Oct 15 | 7:38 AM | 6:41 PM | 11 h 3 min |
| Nov 15 | 7:17 AM | 5:00 PM | 9 h 43 min |
| Dec 15 | 7:50 AM | 4:49 PM | 8 h 59 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 Lyon County or the local office.
Find the township or town where you are now or find your county.