The video for "Party For One" was shot in New York City and directed by Jepsen's fellow Canadian Bardia Zeinali (Troye Sivan's "Dance To This
"). The clip starts with Jepsen checking into a hotel for the night before showing scenes of other guests in the same building alone in their rooms. Each have their own way of dealing with being on their own.
Zeinali told Billboard
that Jepsen visualized the clip as a play on romantic comedy movies such as Bridget Jones's Diary
. She added that the singer wanted it to be a "journey that you go through in your alone time," so she started watching various rom-coms, in order to figure out the clichés that could be flipped on their head.