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- The labor system: two locals and a reckoning Industrial Revolution
- The labor the works drew Industrial Revolution
- The Laborist First and the Level III Certifications, 2012–2019 Medical Advancements
- The Ladder at Central Park, Counted Wildlife
- The Ladies' Library: a dollar a year, and the rooms that ran out Libraries
- The Laidig Foundations: Four Vehicles on Madison Road Foundations & Nonprofits
- The Lampreys: Two Natives and an Invader Wildlife
- Land Surveys & Titles Section
- The Land-Trust Holder Whole: The Shirley Heinze Land Trust in This County Trails
- The land: the annexation course The Story of Mishawaka
- The Landmark Lounge Across From the Institution: The Linebacker Test on the Bethel Corridor Bars & Nightclubs
- "The largest center of heavy industry west of Detroit" — the iron decade Famous Stories & the Record
- "The largest margin in the city's history" — Canfield, 1959 Famous Stories & the Record
- "The largest single order for buses ever placed" — AM General's 620 Famous Stories & the Record
- The last decade as a chronology, 2015–2026 Mishawaka Today
- The last streetcars: Mishawaka's cars ran to the system's last day, 15 June 1940 Public Transit
- The last years: Uniroyal Plastics and the closing of 1997 Ball Band
- Latino Mishawaka: present, and thinly documented Culture
- Latino Mishawaka: the stream that worked here and settled across the river, then a community of its own Communities
- The laundries — from the Home Laundry to the Laundryette Businesses & Banks
- The law over their heads: the 1831 bond law, Article XIII, and the 1851 referendum Underground Railroad
- The law written for a category of one Private Clubs
- The ledger of losses, and the live case Historic Preservation
- The Leep Family: A Living Fortune, Printed Only in Its Giving Great Fortunes
- The Leep Foundation: A Dealer Family's Giving, Kept in Three Channels Foundations & Nonprofits
- The legitimate million inside a rigged game, 2004 Lottery & Crypto
- The librarians: Olive Long to Donna Meeks Libraries
- Libraries Section
- The library murals' painter, settled: Crewes Warnacut (1900–1952) Arts
- The library that moved by book cart Strange but True
- The Library's Museum: The Heritage Room Museums
- The license test: no station of record is Mishawaka's Film & TV Producers
- The limits of this record War Heroes
- The Lincoln Highway through Mishawaka: Lincolnway, 1913, and the route's departure Public Transit
- Lincoln Park — the famous grave that never held anyone Famous Landmarks
- The Lincoln Way East fights, 2000–2002: interim protection, a lawsuit, and an amendment Historic Preservation
- Lincolnway: the Lincoln Highway through Mishawaka, 1913 to 1928 Main Roads & Corridors
- The lines out of the city: Indianapolis and Washington Public Servants
- The Lions Club of Mishawaka: chartered 1923 Private Clubs
- Lisa Germano: the violinist who walked out of the heartland band Notable People
- Literary Institutions: Journals and Presses Seated Here Arts
- The live stage after the palaces: a school auditorium and a storefront stage Theaters
- The Live Verification Layer: The State and Federal Registers of the Present Sources
- The livery trade — three stables, two barns, one survivor, and the motor succession Businesses & Banks
- The living map: the regional GIS, verified November 2026 Historic Maps
- The loans, drive by drive: First, Second, Third and Victory WWI Home Front
- Local 65: the documented labor course Ball Band
- The local ledger, first entry: Petro Park, designated 15 May 2000 Historic Preservation
- Lodges & Fraternal Orders Section
- LOGAN: the agency that began in a Mishawaka schoolroom Charities
- The lone inventors and the empty chairs: the record at its true size Inventors & Inventions
- The long narrowing: a half-century of removals, one line at a time Industrial Revolution
- The long service, gathered: what the rosters prove Public Servants
- The long tail, I: physicians, lawyers and judges, architects, editors — entries 1–27 Notable People
- The long tail, II: trustees, councilmen, clerks, marshals and the appointed desks — entries 28–58 Notable People
- The long tail, III: the mid-century desks, the schools' servants, the federal desk — entries 59–78 Notable People
- The long tail: sixty-eight names from the 1916–1917 gazetteer Notable People
- The long wait: thirty years without a new hotel Hotels & Motels
- Long-Term Acute Care at Lindenvale, 2007 Medical Advancements
- The longest-lived house, and the keepers' test Wineries & Distilleries
- The Lore Business: Who Manufactures It, Who Carries It, and What It Is Worth Ghost Stories
- Lottery & Crypto Section
- The Ludwig Killing, 1906 — the Case the Supreme Court Preserved Crime History