- Acting for Two: For the TV special, June Foray plays the schoolteacher, Karen (originally), as well as her friends. Meanwhile, Paul Frees plays the traffic cop, the ticket man at the station, and Santa Claus.
- Fan Nickname: The children (Karen, Holly, Tommy and Sarah) who help Frosty are known as "snow angels".
- Keep Circulating the Tapes: The original version where Karen bore the voice of June Foray. Australian voice actor and historian Keith Scott claims to own an old record containing Foray's original dialogue, though it's unknown if he still has it. Also this video notes the differences between a VHS tape and a Blu-ray - the uploader didn't know it at the time, but this scene is in fact taken from the Foray version, which was apparently remastered by accident. Finally averted in December 2016, when a reconstruction of the original cut was uploaded to YouTube, using Rhino's audio CD as a source.
- The Other Marty: Karen was voiced by June Foray in the original airing; later and most current versions have another, uncredited actress. Due to the credits still crediting June Foray as doing Karen's voice, her replacement went unidentified, until Mark Evanier's DVD Commentary for the 2018 Deluxe Edition DVD and Blu-ray referred to the girl as Suzanne Davidson. Interestingly enough, certain bits of Foray's performance are left in the redub besides her singing: The first sneeze in the boxcar, another sneeze while in the woods, Karen crying over the Frosty puddle, and the little yelp she gives out when running into Frosty's arms while on her rooftop.
- Playing Against Type: Jackie Vernon is best remembered today for doing the voice of Frosty, but at the time he was famous as a comedian. His comedy style was edgy and unconventional; imagine a combination of Steven Wright (deadpan Non Sequitur one-liners), George Carlin (oddball observations, occasional raunch) and Rodney Dangerfield (hefty build, schlubby persona) and you have a rough idea of Vernon's act. Thus, starring as a jolly snowman in a family-oriented animated show definitely qualifies.
- Real Song Theme Tune: The title song was written by Steve Nelson and Jack Rollins and first recorded in 1950, 19 years before the special's premiere.
- Unintentional Period Piece: The special begins with children going to school on Christmas Eve, which was common up until the mid-60s.
- Vanilla Edition: Exaggerated. The Greek dollar-store DVD release of the special, which was released in 2015 (one of the last ever made there alongside Mr Magoos Christmas Carol), features no extras. The film starts playing as soon as the disc is popped in the DVD player (there's no DVD menu), and the video ends midway through the end credits.
- What Could Have Been: It was reported in 2020 that a live-action reboot of Frosty was in the works, starring Jason Momoa in the role. However, Momoa denied that it was happening, claiming it was a distraction from Warner Brothers to turn attention away from the Troubled Production of Justice League and the subsequent investigation into allegations of misconduct on set of that film.
Trivia / Frosty the Snowman