Decatur Township, Marion County, Indiana
Decatur Township is a township in Marion County, Indiana. About 36,938 people live there (2020–2024 estimate). It covers 32.3 sq mi (83.6 km²) of land and uses Eastern Time. It has its own local government.
- Population, 2020–2024 estimate
- 36,938 ± 50
- County
- Marion County
- School district
- Decatur Township Metropolitan School District
- Land area
- 32.3 sq mi (83.6 km²)
- Type
- TownshipIts own local government
- Time zone
- Eastern TimeUTC-05:00 in January; UTC-04:00 in July
- Median household income
- $70,206 ± $5,586
- Median home value
- $210,300 ± $9,213
- Water area
- 0.06 sq mi (0.16 km²)
- State
- Indiana
- Census code (GEOID)
- 1809717092
- Coordinates (central point)
- 39.678656, -86.275451
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
- Guilford Township, Hendricks County5.7 mi west
- Perry Township6.3 mi east
- Wayne Township6.4 mi north
- Madison Township, Morgan County6.5 mi south
- White River Township, Johnson County8.3 mi southeast
- Center Township9.8 mi northeast
These towns, townships, cities and boroughs share a boundary with Decatur Township. Distances are straight lines between central points, not driving distances.
Other townships in Marion County, largest first
- Center Township152,977 people
- Wayne Township148,293 people
- Washington Township138,384 people
- Lawrence Township122,402 people
- Perry Township121,505 people
- Warren Township106,062 people
- Pike Township83,009 people
- Franklin Township66,239 people
People counts are American Community Survey 2020–2024 5-year estimates. See Marion County for its cities, ZIP Code areas and county seat.
Sunrise and sunset in Decatur Township
- Longest day
- 14 hours 59 minutes around June 21
- Shortest day
- 9 hours 21 minutes around December 21
- Earliest sunrise
- 6:16 AM around June 14
- Latest sunrise
- 8:19 AM the day before clocks go back in November
- Earliest sunset
- 5:20 PM around December 7
- Latest sunset
- 9:17 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 | 8:04 AM | 5:45 PM | 9 h 41 min |
| Feb 15 | 7:37 AM | 6:21 PM | 10 h 44 min |
| Mar 15 | 7:56 AM | 7:51 PM | 11 h 55 min |
| Apr 15 | 7:07 AM | 8:23 PM | 13 h 16 min |
| May 15 | 6:30 AM | 8:52 PM | 14 h 22 min |
| Jun 15 | 6:16 AM | 9:14 PM | 14 h 58 min |
| Jul 15 | 6:29 AM | 9:12 PM | 14 h 43 min |
| Aug 15 | 6:57 AM | 8:41 PM | 13 h 44 min |
| Sep 15 | 7:26 AM | 7:53 PM | 12 h 27 min |
| Oct 15 | 7:55 AM | 7:06 PM | 11 h 11 min |
| Nov 15 | 7:29 AM | 5:29 PM | 10 h |
| Dec 15 | 7:58 AM | 5:21 PM | 9 h 23 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 Marion County or the local office.
Find the township or town where you are now or find your county.