Last names starting with "D"
- Class of 1981 Kim Dahlstrom (formerly Hindle)
- Class of 1988 Pamela Daley (formerly Sweeney)
- Class of 2000 James Daniels
- Class of 1999 Nathan Davis
- Stephen Deal
- Kelly Demars
- Class of 1979 Susan Denman
- Class of 2002 Ryan Dennis
- Class of 1999 Jason Desjardens
- Class of 1996 Jason Desjardins
- Class of 1982 Doreen Dewolf
- Class of 1992 Dorene Dewolf
- Class of 1982 Dorreen Dewolf
- Class of 1984 Susan Dewolf
- Class of 2007 Regan Dobbin
- Class of 1972 Judy Dohr
- Class of 1979 Illena Douglas
- Class of 2008 Michelle Dupuis
- Class of 1999 Chirstina Durnick
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About the Haddam Killingworth High School Alumni Directory
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