Riverside Township, Mellette County, South Dakota
Riverside Township is a township in Mellette County, South Dakota. It covers 55.7 sq mi (144 km²) of land and uses Central Time. Its government is inactive; it keeps powers for special purposes only.
- County
- Mellette County
- School district
- White River School District 47-1
- Land area
- 55.7 sq mi (144 km²)
- Type
- TownshipGovernment inactive
- Time zone
- Central TimeUTC-06:00 in January; UTC-05:00 in July
- Water area
- 0.3 sq mi (0.77 km²)
- State
- South Dakota
- Census code (GEOID)
- 4609555180
- Coordinates (central point)
- 43.687988, -100.349087
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
- Bad Nation Township5.4 mi south
- Cody Township9.5 mi west
- Williams Creek Township, Jones County9.8 mi north
These towns, townships, cities and boroughs share a boundary with Riverside Township. Distances are straight lines between central points, not driving distances.
Other townships in Mellette County, largest first
- Norris Township172 people
- Rocky Ford Township53 people
- Blackpipe Township50 people
- Surprise Valley Township50 people
- Mosher Township28 people
- Red Fish Township28 people
- Cody Township23 people
- Fairview Township22 people
- Bad Nation Township19 people
- Running Bird Township5 people
- Butte Township0 people
- New Surprise Valley Township0 people
All 14
- Prospect Township0 people
- Rosebud Township0 people
People counts are American Community Survey 2020–2024 5-year estimates. See Mellette County for its cities, ZIP Code areas and county seat.
Sunrise and sunset in Riverside Township
- Longest day
- 15 hours 27 minutes around June 21
- Shortest day
- 8 hours 56 minutes around December 21
- Earliest sunrise
- 5:59 AM around June 15
- Latest sunrise
- 8:23 AM the day before clocks go back in November
- Earliest sunset
- 5:04 PM around December 9
- Latest sunset
- 9:27 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 | 8:11 AM | 5:30 PM | 9 h 19 min |
| Feb 15 | 7:40 AM | 6:11 PM | 10 h 31 min |
| Mar 15 | 7:53 AM | 7:47 PM | 11 h 54 min |
| Apr 15 | 6:58 AM | 8:24 PM | 13 h 26 min |
| May 15 | 6:16 AM | 8:59 PM | 14 h 43 min |
| Jun 15 | 5:59 AM | 9:24 PM | 15 h 25 min |
| Jul 15 | 6:13 AM | 9:20 PM | 15 h 7 min |
| Aug 15 | 6:45 AM | 8:45 PM | 14 h |
| Sep 15 | 7:20 AM | 7:51 PM | 12 h 31 min |
| Oct 15 | 7:55 AM | 6:58 PM | 11 h 3 min |
| Nov 15 | 7:35 AM | 5:16 PM | 9 h 41 min |
| Dec 15 | 8:08 AM | 5:04 PM | 8 h 56 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 Mellette County or the local office.
Find the township or town where you are now or find your county.