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- The tallest sunflower in the world grew in a Fort Wayne backyard Strange but True
- The Tasmanian Devils: A North American Record and a Return Zoo
- Taxis and the airport — in brief Public Transit
- Taylor (ed.), History of Allen County in the World War (1920) Sources
- Taylor, Freeman & Company Businesses
- Team Histories Section
- Technology Section
- Television — Three Stations on West State Street Newspapers & Media
- Television: segments, stock shots, and one famous courthouse Film
- Theaters Section
- Theme Brothers Hosiery Notable People
- Theme Brothers Hosiery (Los Angeles) Businesses
- Theodore F. Thieme Notable People
- Theodore F. Thieme: Hosiery Money, Given to Art Great Fortunes
- Thieme Brothers Hosiery Company Notable People
- Thieme Brothers Hosiery Company (Thieme Brothers Company) Businesses
- Thieme Brothers silk hosiery, and the family's clothing trade Fashion
- Thirty-eight coffins for Peru Strange but True
- The thirty-year watch: the Merchant Huxford House Historic Preservation
- Thomas E. Ellison Notable People
- Thomas J. Tolan (1830–1883) — architect Notable People
- Thomas Tigar Notable People
- Thomas W. Swinney: The Land West of Town Great Fortunes
- Three flags over the fort: the commandants, 1722–1819 Government
- Three groups become one · Fort Wayne Trails, 2011 Bike Trails
- Three groups become one, and the Rangers who walk it Trails
- Three moves in six years: Bayless, Brackenridge, Elektron Libraries
- Three pathways from the zero marker Trails
- The Three Rivers Section
- Three Rivers Distilling Company: the distillery returns Wineries & Distilleries
- Three Rivers Festival: the children's parade and the 527-foot hot dog Kids & Family Entertainment
- Three Rivers Music Theatre Arts
- The threshold test: was a farm tractor ever built in Fort Wayne? Tractors
- Time capsules: the messages the city sent itself Historic Preservation
- Timothy Goeglein Notable People
- Timothy L. Johnson Academy Schools & Colleges
- Timothy L. Johnson Academy Middle School Schools & Colleges
- Tokheim Notable People
- Tokheim — Tokheim Manufacturing Company (Cedar Rapids) → Tokheim Oil Tank and Pump Company → Tokheim Corporation Businesses
- Told often, checked in the ledger Strange but True
- The Topographic Record: USGS and the Quadrangles Historic Maps
- Towles Intermediate School Schools & Colleges
- The Towpath · canal, then interurban, then trail Bike Trails
- The Towpath: a canal, an interurban, and a trail walk into Aboite Trails
- Tractors Section
- The trade, part one: implement houses and agencies Tractors
- The trade, part two: Harvester's Fort Wayne branch house sold the tractors the plant did not build Tractors
- Trai Essex Notable People
- Trai Essex: a state title at Harding, two Super Bowls in Pittsburgh Sports Players
- Trails Section
- Trails on the levees: the flood work you can walk on Trails
- The transformation measured · the census of manufactures Industrial Revolution
- The transplant era: a heart in 1985, a kidney in 2007, the close in 2023 Medical Advancements
- Trauma, verified: the first verified centers outside Indianapolis Medical Advancements
- The treaties that did not touch this ground Land Treaties & Titles
- The treaty record in print: Kappler, the Statutes at Large, Thornbrough Sources
- Tri-State Loan and Trust Company Businesses
- Trine and Ivy Tech: the campuses that arrived with their donors Major Donations
- Trine University in Fort Wayne Schools & Colleges
- Trinity English Lutheran Church Churches & Religion
- Trinity Episcopal Church Churches & Religion
- The truck plant at war: the M-5-6 and the Lend-Lease line Automobiles
- Trucks to Russia, chargers to the sky: the wartime outward trade Exports
- The trunk era: TWA, Chicago & Southern, United, jets Airports
- The trunk-line city — Wabash, the south and north lines, and the Nickel Plate Railroads
- Trust companies, savings banks and the building-and-loan layer Banks
- TrustBearer: the Fort Wayne security startup VeriSign bought Dot-Com Era
- The turbosupercharger: produced here at a scale no other factory matched Inventors & Inventions
- Turner Chapel A.M.E. · the first institution Black History
- Turner Chapel A.M.E. Church Churches & Religion
- The turning: pollution, phosphorus, and Lake Erie's bill The Three Rivers
- Turnstone: from the Society for Crippled Children Charities
- Two eleventh hours: the bridge and the station Historic Preservation
- Two fields, two names: the settlement of 1941 Airports
- The two forts the spades cannot find Historical Mysteries
- Two hundred people saw the first game Strange but True
- Two Legacies in Brick and Glass: The Foellinger Theatre and the Conservatory Great Fortunes
- Two modern foundings, briefly — Asher and Petroleum Traders Founders & CEOs
- Two Newsrooms, One Press — the Joint Operating Agreement Newspapers & Media