Chiba 11th district

Chiba 11th district (千葉県第11区, Chiba-ken dai-jūikku or simply 千葉11区, Chiba-jūikku) is a single-member constituency of the House of Representatives in the national Diet of Japan located in the eastern portion of Chiba Prefecture. After re-districting in 2022 the constituency covers six cities: Mobara, Tōgane, Katsuura, Isumi, Sanmu and Ōamishirasato, and three districts: Sanbu, Chōsei, and Isumi. The district was created in 1994 as part of an electoral reform effort in the Japanese House of Representatives, and was first implemented in the 1996 general election.

As of 2015, this district was home to 365,194 constituents.