D
- Daily life and labor at the school Mental Health Institutions
- Dale Enochs (b. 1952) — sculptor Notable People
- Dale Enochs: the native who carves limestone Artists
- Dale W. McMillen Notable People
- Dale W. McMillen: Feed, Soya, and "Mr. Mac" Great Fortunes
- DaMarcus Beasley Notable People
- DaMarcus Beasley: four World Cups out of South Side Sports Players
- Dan Butler Notable People
- Dan Coats Notable People
- Dana Corporation — the Fort Wayne (Salisbury Axle) plant Businesses
- The dance floor: the Ballet and the Collective Culture
- Daniel B. Ninde Notable People
- Daniel M. Falls Notable People
- Darl Parker and the Lincoln National robbery · the road to Alcatraz Bank Robberies
- Dave Thomas Notable People
- Dave Thomas: formed at the Hobby House Famous People
- David and Peter Turnley: McClellan Street Photographers
- David Burr Notable People
- David N. Foster Notable People
- David Ruoff — "I dug the first ditch" Founders & CEOs
- David Turnley Notable People
- The dealer trade after Columbia Street Automobiles
- The Dealerships Section
- Dean Corll Notable People
- DeBrand: the chocolate house on Auburn Park Drive Food & Restaurants
- Decatur Road and the Lincoln Highway — the highway-era paths Main Roads & Corridors
- Decline and the downtown gap, 1963–1985 Hotels
- Deer Ridge Elementary School Schools & Colleges
- Deer: gone for forty years, then everywhere Wildlife
- The defense city · an overview Military
- DeHaven Chevrolet: one family, three generations, one near-death The Dealerships
- The Demolition Ledger — What Was Lost Architecture
- Dennis C. Zook Notable People
- The department's board · how Fort Wayne publishes its cold cases Cold Cases
- Departments and firsts, 1905–1918 Libraries
- Deposit stations and the first branches Libraries
- The depots — Fort Wayne's succession of front doors Railroads
- Deregulation and the loss of the headquarters Banks
- Deregulation and the regional-jet age Airports
- Desegregation at the elementary schools — the boycott, the settlement, the magnets Schools & Colleges
- Deshaun Thomas Notable People
- The designation record: districts, landmarks, and the counts Historic Preservation
- Dick York Notable People
- Dick York: the first Darrin Stephens Comedy
- Dime Trust & Savings Bank Businesses
- The Diocese of Fort Wayne (now Fort Wayne–South Bend) and its cathedral Churches & Religion
- The directors Libraries
- Dirk Gates Notable People
- Dirk Gates: Xircom, sold to Intel at the top of the bubble Dot-Com Era
- The district named: a state cultural district, 2021 Culture
- Do it Best: The Fortune That Belongs to Its Members Great Fortunes
- Don Ayres Honda: a Honda store from Honda's first American year The Dealerships
- Don Hall's: the drive-in that became a dining dynasty Food & Restaurants
- The Don Wood Foundation: the manufacturer-endowed newcomer Foundations & Nonprofits
- Dot-Com Era Section
- Dottie Collins: the Strikeout Queen of the Daisies Sports Players
- The downtown arena that a study stopped City Controversies
- The downtown clubs: the Commercial Club and its circle Private Clubs
- The downtown return: Courtyard 2010, Hampton 2019, the Bradley 2021 Hotels
- Doxsee, A History of the Allen County Bar and Courts, 1824–2019 (2019) Sources
- Drag racing: the strip Fort Wayne never had Racing
- Drake Hogestyn (1953–2024) — actor Notable People
- The dream of 1975: an editor, a consortium, and nine miles Trails
- Drinking the St. Joseph: the water supply The Three Rivers
- Drive-ins and the cruise: the car as the evening's room Automobiles
- The drive-ins, I: the 1939 experiment and the Fort Wayne Drive-In Theaters
- The drive-ins, II: East 30, Hillcrest, Lincolndale, and the end of the outdoor era Theaters
- The drive-ins: the family car as a theatre seat Kids & Family Entertainment
- Driving Park and Seven States Neighborhoods
- Driving Park: where Fort Wayne first raced Racing
- The drone era: winter 2024–25 UFO Sightings
- Dudlo Manufacturing Company Notable People
- Dudlo Manufacturing Company (Dudlo Wire Co.) Businesses