| Date formed | into this twp |
|---|
| February 2, 1847 | Des Moines, Madison, Camp, and Skunk |
| January 4, 1848 | Allen, Four Mile, and Saylor |
| June 16, 1859 | Jackson - Vacated then restored to Madison |
| July 12, 1859 | Madison Township |
| October 2, 1849 | A portion of Saylor was attached to Des Moines Twp |
| January 9, 1850 | Beaver twp was organized from parts of Skunk and Camp twps |
| October 9, 1850 | Delaware |
| January 2, 1851 | Jefferson |
| 1851 | Elkhart |
| March 6, 1856 | Washington and Franklin |
| September 28, 1857 | Lee |
| September 6, 1858 | Douglas |
| September 21,1858 | Portion of Camp twp was added to Four Mile twp |
| September 21, 1858 | Portion of Four Mile was added to Lee twp |
| September 20, 1858 | Bloomfield |
| January 7, 1860 | Walnut twp was organized from portions of Jefferson and Des Moines |
| March 26, 1860 | Above was reorganized with certain changes |
| October 1, 1860 | A portion of this twp was added to Jefferson |
| March 26, 1860 | Valley twp |
| September 7, 1870 | Grant from a portion of Lee. |
| December 26, 1870 | Saylor reorganized, Crocker and Lincoln were constituted of parts of Madison, Lee and the original Saylor twp |
| 1870 | Skunk, one of the original townships, was absorbed by Washington, Elkhart, and Franklin |
