Various songs were recorded for Melanie Martinez's various projects over the years.
This list includes unreleased, possibly older songs that may or may not have been intended for formal release at all.
- Bold typing indicates that the song, snippets of the song or lyrics have been leaked/posted/performed at some point.
- Italic typing indicates that the song was intended for one of Melanie's studio albums or EPs but was scrapped.
- Underlined typing indicates that the song's full studio version has been leaked.
- i indicates that the song's full studio instrumental has been leaked.
- d indicates that the song's demo or snippets of the demo have been leaked/posted/performed at some point.
- 1st Unknown Song | Melanie Martinez
- 2nd Unknown Song | Melanie Martinez, Kinetics & One Love
- 3rd Unknown Song | Melanie Martinez
- 4th Unknown Song | Melanie Martinez, Talay Riley & Rey Reel
- 5th Unknown Song | Melanie Martinez & Dre Skull
- 6th Unknown Song | Noah Cyrus & Melanie Martinez
- 7th Unknown Song | Melanie Martinez, Josh Kaufman & Doveman
- 99 Cent Store | Melanie Martinez, Kinetics & One Love
- A Million Men | Melanie Martinez
- A Thousand Words | Melanie Martinez, John Feldmann & Neon Hitch
- Band-Aid | Melanie Martinez
- Bombs on Monday Morningd | Melanie Martinez, Kinetics & One Love
- Bones Are Blue | Melanie Martinez
- Can't Shake You | Melanie Martinez, Anya Marina, Mitchy Collins & Larzz Principato
- Cooties | Melanie Martinez & Felix Snow
- Dear Porcupines | Melanie Martinez, THE ELEV3N & Doveman
- Gold Diggin' Love | Melanie Martinez, Kinetics & One Love
- Half Hearted | Melanie Martinez & Miles Nasta
- Haunted | Melanie Martinez, CJ Baran & Kara DioGuardi
- Heart at the Door | Melanie Martinez & Syience
- I Love My Ride | Melanie Martinez
- I Screamd | Melanie Martinez, CJ Baran & Snow Tha Product
- Intervals | Melanie Martinez
- Jumprope | Melanie Martinez, Justin Tranter & Nick Monson
- King Of The Arcade | Melanie Martinez
- Last Chapter (Never Stayed For Love)d | Melanie Martinez, John Feldmann & Neon Hitch
- Milky Way | Melanie Martinez
- Mistakes | Melanie Martinez & Robopop
- Night Mimed | Melanie Martinez & SmarterChild
- Oh, Carousel | Melanie Martinez
- Papercut | Melanie Martinez, Kinetics & One Love
- Psycho Lovers | Melanie Martinez & Robopop
- Race | Melanie Martinez
- Rocking Horse i | Melanie Martinez, Kinetics & One Love
- Rough Love | Melanie Martinez & John Feldmann
- Run | Melanie Martinez
- Schizo | Melanie Martinez, Kinetics & One Love
- Silence Says | Melanie Martinez, Kinetics & One Love
- The One | Melanie Martinez
- Time Flies | Melanie Martinez
- Unhappy Meal | Melanie Martinez
- Untitled Song | Melanie Martinez
- Until Sunrise | Melanie Martinez & Syience
- Where Do Babies Come From?d | Melanie Martinez
- You Love I id | Melanie Martinez, Kinetics & One Love
- Zzzz | Melanie Martinez, Kinetics & One Love
- On October 12th, 2019, five titles were leaked by a reputable insider known as BlackoutZone that were: Zzzz, Rocking Horse, Ring Pop, Coloring Book and Drowning. Both Zzzz and Rocking Horse would later leak in full.
- In November, 2019, the same insider revealed another title, Cooties, which would also later leak in full.
- BlackoutZone also mentioned the titles, Seesaw, Soup and Salad and AK-47 although the dates they were confirmed are unknown.
- The title, Coloring Book was first mentioned by Melanie on her Tumblr in 2014, where a fan asked which other titles were considered for her debut album. She also mentioned two other titles in the same post, Animal Crackers and Toy Chest, which also could be Cry Baby outtakes.
- On March 30th, 2020, a reputable insider named 2Heads reconfirmed Zzzz, Rocking Horse, Ring Pop, Coloring Book and Drowning. The same day he also confirmed a Dead to Me writers demo and a Silence Says writers demo. He also confirmed he had Rocking Horse's instrumental, which later leaked.
- On October 4th, 2020, 2Heads mentioned the title, Twins.
- On October 10th, 2020, 2Heads mentioned that there is a studio Night Mime final.
- Insider known as Eclipse confirmed title Dead Body what stands rather for a demo of Band Aid than a stand-alone song title.
- The title Heartbeat was mentioned by a LanaBoards user in early 2018. Another LanaBoards user mentioned the title Candy Love mid-2018.
- The titles Gluestick and Eraser are mentioned on LanaBoards on February 18th, 2021.
- Play Date replaced Half Hearted at the last moment.
- A Thousand Words, Dear Porcupines, I Scream, Mistakes, Papercut, Unhappy Meal, Where Do Babies Come From? and Zzzz are all considered explicit.
- Although Dear Porcupines is explicit, Melanie usually performed the song without the swear words.
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