Statehood was effective in Dec. 17, 1816, but lands north of the Grouseland Treaty Line became part of Jennings County in July 23, 1819. Townships of Jennings County (from top of map to bottom, from left to right) Row 1: Geneva, Sand Creek, Center (below Sand Creek), Columbia, Campbell (below Columbia) Row 2: Spencer, Vernon, Bigger Row 3: Lovett Row 4: Marion, Montgomery Back to Genealogy page Back to Jennings County, In. Formation Back to Communities and Towns of Jennings County, Indiana