Jhoori is the folk music of which state?

Concept — Indian folk music is regional: each state carries its own repertoire of named song-forms, and a form's name usually travels with the dialect area, landscape and ritual or seasonal calendar it grew out of. Named forms can and do spread across borders, so identification rests on the documented association between a particular name and the region where that form is recorded and practised.

Application — Jhoori (also written Jhuri) is a song-and-dance form of the Pahari-speaking western Himalayan hill belt, and it belongs to Himachal Pradesh. It is documented as part of the Sirmauri folk-music family of the upper Shivalik region, sung mainly at night in the summer months, with romantic themes and a slow circling dance.

Cross-check — Setting the documented repertoire of each region side by side makes that association clear:

Jhoori is documented within the Sirmauri repertoire, so the state whose folk music it is is Himachal Pradesh.