Iona Township, Lyman County, South Dakota
Iona Township is a township in Lyman County, South Dakota. About 11 people live there (2020–2024 estimate). It covers 128 sq mi (331 km²) of land and uses Central Time. It has its own local government.
- Population, 2020–2024 estimate
- 11 ± 12
- County
- Lyman County
- School district
- Gregory School District 26-4
- Land area
- 128 sq mi (331 km²)
- Type
- TownshipIts own local government
- Time zone
- Central TimeUTC-06:00 in January; UTC-05:00 in July
- Water area
- 9.82 sq mi (25.4 km²)
- State
- South Dakota
- Census code (GEOID)
- 4608531740
- Coordinates (central point)
- 43.598696, -99.440759
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
- Brule Township, Brule County9.8 mi northeast
- America Township, Brule County10 mi east
- Dixon Township, Gregory County12 mi south
- Landing Creek Township, Gregory County13 mi south
- Oacoma Township14 mi north
These towns, townships, cities and boroughs share a boundary with Iona Township. Distances are straight lines between central points, not driving distances.
Other townships in Lyman County, largest first
- Vivian Township158 people
- Oacoma Township51 people
- Bailey Township26 people
- Rex Township16 people
- Pratt Township0 people
People counts are American Community Survey 2020–2024 5-year estimates. See Lyman County for its cities, ZIP Code areas and county seat.
Sunrise and sunset in Iona Township
- Longest day
- 15 hours 26 minutes around June 21
- Shortest day
- 8 hours 56 minutes around December 21
- Earliest sunrise
- 5:55 AM around June 15
- Latest sunrise
- 8:19 AM the day before clocks go back in November
- Earliest sunset
- 5:00 PM around December 9
- Latest sunset
- 9:23 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 | 8:08 AM | 5:26 PM | 9 h 18 min |
| Feb 15 | 7:36 AM | 6:07 PM | 10 h 31 min |
| Mar 15 | 7:50 AM | 7:43 PM | 11 h 53 min |
| Apr 15 | 6:55 AM | 8:21 PM | 13 h 26 min |
| May 15 | 6:12 AM | 8:55 PM | 14 h 43 min |
| Jun 15 | 5:55 AM | 9:20 PM | 15 h 25 min |
| Jul 15 | 6:10 AM | 9:16 PM | 15 h 6 min |
| Aug 15 | 6:42 AM | 8:41 PM | 13 h 59 min |
| Sep 15 | 7:17 AM | 7:48 PM | 12 h 31 min |
| Oct 15 | 7:51 AM | 6:54 PM | 11 h 3 min |
| Nov 15 | 7:31 AM | 5:12 PM | 9 h 41 min |
| Dec 15 | 8:04 AM | 5:01 PM | 8 h 57 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 Lyman County or the local office.
Find the township or town where you are now or find your county.