Rock River Township, Alger County, Michigan
Rock River Township is a township in Alger County, Michigan. About 1,173 people live there (2020–2024 estimate). It covers 80.7 sq mi (209 km²) of land and uses Eastern Time. It has its own local government.
- Population, 2020–2024 estimate
- 1,173 ± 176
- County
- Alger County
- School district
- Superior Central Schools
- Land area
- 80.7 sq mi (209 km²)
- Type
- TownshipIts own local government
- Time zone
- Eastern TimeUTC-05:00 in January; UTC-04:00 in July
- Median household income
- $63,235 ± $8,483
- Median home value
- $213,800 ± $23,027
- Water area
- 0.25 sq mi (0.65 km²)
- State
- Michigan
- Census code (GEOID)
- 2600369160
- Coordinates (central point)
- 46.346884, -86.994898
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 River Township
- Chatham (village)135 people
This place’s central point lies inside Rock River 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
- Limestone Township7.4 mi south
- Onota Township7.5 mi north
- Skandia Township, Marquette County8.5 mi west
- Au Train Township11 mi east
These towns, townships, cities and boroughs share a boundary with Rock River Township. Distances are straight lines between central points, not driving distances.
Other townships in Alger County, largest first
- Munising Township2,825 people
- Au Train Township1,165 people
- Limestone Township442 people
- Onota Township435 people
- Mathias Township428 people
- Burt Township296 people
- Grand Island Township23 people
People counts are American Community Survey 2020–2024 5-year estimates. See Alger County for its cities, ZIP Code areas and county seat.
Sunrise and sunset in Rock River Township
- Longest day
- 15 hours 48 minutes around June 21
- Shortest day
- 8 hours 35 minutes around December 21
- Earliest sunrise
- 5:55 AM around June 16
- Latest sunrise
- 8:36 AM the day before clocks go back in November
- Earliest sunset
- 5:01 PM around December 10
- Latest sunset
- 9:44 PM around June 26
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 | 8:27 AM | 5:28 PM | 9 h 1 min |
| Feb 15 | 7:51 AM | 6:13 PM | 10 h 22 min |
| Mar 15 | 8:00 AM | 7:53 PM | 11 h 53 min |
| Apr 15 | 7:01 AM | 8:35 PM | 13 h 34 min |
| May 15 | 6:14 AM | 9:14 PM | 15 h |
| Jun 15 | 5:55 AM | 9:42 PM | 15 h 47 min |
| Jul 15 | 6:10 AM | 9:36 PM | 15 h 26 min |
| Aug 15 | 6:46 AM | 8:57 PM | 14 h 11 min |
| Sep 15 | 7:25 AM | 7:59 PM | 12 h 34 min |
| Oct 15 | 8:05 AM | 7:01 PM | 10 h 56 min |
| Nov 15 | 7:49 AM | 5:15 PM | 9 h 26 min |
| Dec 15 | 8:24 AM | 5:01 PM | 8 h 37 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 Alger County or the local office.
Find the township or town where you are now or find your county.