No, Jack Off Jill is not a goth band, because they play Alternative Rock, Riot grrrl, while goth music consists of Gothic Rock and its derived genres, like Deathrock, Darkwave, Ethereal Wave, and Coldwave.

If you want to dive into the goth music scene, some of the bands that might appeal to you if you enjoy Jack Off Jill are Claire Voyant, Diva Destruction, and Switchblade Symphony.