| Harlan Dondelinger|
|Hair||Gray Brown (formerly)|
|Occupation||Principal of Springfield High School|
|First Appearance||"The Way We Was"|
|Voiced By||Harry Shearer|
Principal Harlan Dondelinger (or Harlan Dondelinger for short) is the principal of Springfield High School, dating as far back as 1974. He was principal when Homer and Marge were in their final year in the flashback episode "The Way We Was" where he was shown as being a stern figure who appeared to have had several run-ins with Homer and Barney Gumble. He also appeared at Homer and Marge's reunion in "The Front" and at Artie Ziff's re-creation of the prom in "Half-Decent Proposal". Dondelinger obviously favored Artie over Homer due to the belief that he will be a multimillionaire and do a lot of things that Homer would never do.
Dondelinger infuriated Homer when he revealed that he hid the ballot box with the help of two student athletes(one being Vance Connor) whom came up with the idea of putting Homer's name on the ballot as a joke so when he lost, everyone can laugh at him(which worked out well). He, Vance and another student were presumably blackmailed by Marge and her children to do the right thing and put Homer's name in a plaque on the Springfield Wall of Fame, by threatening to reveal their dirty misdeeds to everyone in Springfield which would've brought humiliation to the men with their downfall and eventual arrest.
- Episode – "The Way We Was" (flashback)
- Episode – "The Front"
- Episode – "Half-Decent Proposal" (Brief appearance)
- Episode – "She Used to Be My Girl" (flashback)
- Episode – "Take My Life, Please"
- Episode – "That '90s Show"
- Episode – "Treehouse of Horror XXIII" (Brief appearance)
- Episode – "Who Shot Mr. Burns? (Part One)"