noun
state legislature; state parliament; provincial parliament
Refers to the legislative body of a state (in a federal system) or a province. Common in political contexts.
カリフォルニア州議会は新しい環境法案を可決した。
The California state legislature passed a new environmental bill.
州議会議員選挙は来月行われる。
The state legislative election will be held next month.
県議会 is a prefectural assembly in Japan, whereas 州議会 is used for states or provinces, often in foreign contexts.
Compound of 州 (state/province) + 議会 (legislature/parliament). A straightforward modern term.