D
- The daguerreian decade, person by person: a printed negative Photographers
- Dams on the reach: the ledge works, restated as works Rivers
- The dated series: St. Joseph County farming, 2012–2022, read from the census itself Farms & Agriculture
- Dead ground rebuilt: nothing of the form on this ground Malls & Shopping
- The dealer record to the present: the franchised row is gone; the auction and the bench remain Tractors
- The decade in one chronology, 2015–2026 Walkerton Today
- The December 1988 citation, upgraded to a full-page read License Branch
- The decoration test: no Medal of Honor, and no valor award the record names Wars & Military Service
- The Defense-City Test: Walkerton's Firms in the Contract Record Military
- The defining players across the eras: the record's restraint, printed Sports
- Dentists and drugs after the bands: one dental address in conflict, one pharmacy seat Health & Care
- The department before the territory: organizing date unfound, the stations roster at its true size Government
- The department: marshals lost to the record, chiefs named, and a family on the force Crime & Public Safety
- The designation record, counted in one article Historic Preservation
- The desk test: the Green Book, 1949 edition, read whole — no Walkerton Hotels & Motels
- Development at record strength: Polygon's August 2026 investment Walkerton Today
- The digitized shelves, as used Sources
- The Diocese of Fort Wayne–South Bend: the course, 1857–2026 Churches & Religion
- The directors: Swanson, Stewart, Kirman, McGee Arts
- The directory of 1882–83 — Polk's entry transcribed whole Businesses
- The directory of 1884–85 — Polk's second canvass Businesses
- The directory of 1916–17 — Polk's entry transcribed whole Businesses
- The disability test: a register re-run, one boundary name Charities
- The Disco and the Big Room, Tested Bars & Nightclubs
- Distillers, rectifiers, wholesalers: a searched negative, with its span printed Wineries & Distilleries
- The district: Lincoln Township by tax — and the North Township turn Arts
- The divided foundings: what the record divides, and what it doesn't Founders & CEOs
- The documentary and the production company: no film of the defining event; the archive is not a studio Film
- The documented case: the county's litigation is real, and none of it arises on this ground Underground Railroad
- Dot-Com Era Section
- The double close: Black women's organizing, and the sisters of St. Patrick's Women's History
- The doubling, 1940–1950: the Kingsbury decade Population
- The Downtown Social Club That Wasn't: Commercial Club Test and the Census-Year Roster Private Clubs
- The downtown unmade? The urban-renewal test Malls & Shopping
- The drainage era: how the marsh was unmade, 1882–1922 The Land
- Dress on show: the fashion-event test Fashion
- The drift: how deep the ice left it Before Walkerton
- The drift: the Kankakee outwash plain Before Walkerton
- The drive-in test: no outdoor screen was ever seated in Walkerton Kids & Family Entertainment
- The drone era as its own period: winter 2024–25, tested for this ground UFO Sightings
- The drug era in the federal record Crime & Public Safety
- The dry years in Lincoln Township Crime & Public Safety