Prefectural elections for the Tokyo Metropolitan Assembly (令和3年/2021年東京都議会議員選挙, Reiwa 3-nen/2021-nen Tōkyō togikai giin senkyo, "Reiwa 3/2021 election of members of the Tokyo Metropolitan Assembly") were held on 4 July 2021. The 127 members were elected in forty-two electoral districts, seven returning single members elected by first-past-the-post, and thirty-five returning multiple members under single non-transferable vote. Two districts had their magnitude adjusted in this election to match population changes.
