I
- Ice and Laundries — Tested Hard, Not Found More Businesses
- "In Memory Of" — How a Small Town Prints Its Dead in Public Arts
- Incorporation: by order of the board of county commissioners, 7 July 1902 Government
- The Independent-News Co. — the Publisher as an Institution Newspapers & Media
- Indiana Landmarks in the county: a South Bend office, no Lakeville holding named Historic Preservation
- The Indiana State Archives — the "Lakeville" Run Still Owed Sources
- The Indiana State Library — the Shelf List Itself Sources
- The Indianapolis line, in its three forms: no Lakeville name in any of them Racing
- Industrial fabric: the mill, the depots, the bank, the tire plant Architecture
- Industrial fame on the ground: the proving ground, the tree sign, and where the signature objects live Famous Landmarks
- Industrial Revolution Section
- The Industrial Revolution: a Synthesis Industrial Revolution
- Influencers & Digital Creators Section
- Infrastructure winners: no carrier hotel, no data centre, and the fibre that arrived as a utility Dot-Com Era
- Institutional feeding: the school cafeteria and the sugar cabin Food & Drink
- The institutional press, worked as a class Sources
- The institutions that never stood Black History
- The instruments that did not take this ground The Land
- The intermediate-goods test: the town sold lumber — the means of everybody else's building Industrial Revolution
- The interurban: proposed toward Plymouth, never built to Lakeville Railroads
- The Invasives, Named One by One — No Lake Record for Any of Them Wildlife
- Inventors & Inventions Section
- Investigators and organisations: the state's named men, and none of this ground UFO Sightings