Yamagata 1st district (山形çÂÂ第1åº, Yamagata-ken dai-ikku or simply 山形çÂÂ第1åº, Yamagata-ikku) is a single-member constituency of the House of Representatives in the Diet of Japan. It is located in Eastern Yamagata and covers the cities of Yamagata, Kaminoyama and Tendà  and the county of Higashimurayama. As of 2012, 306,446 eligible voters were registered in the district.
Since its creation until 2012, the district was mainly contested by Democrat Michihiko Kano (formerly Hata group, leading his own faction from August 2011, until the 1990s: LDP, Fukuda faction), agriculture minister in the realigned Kan cabinet, and Liberal Democrat Toshiaki Endà  (Koga faction), former vice minister in the education and science ministry during the First Abe cabinet. Toshiaki Endà  held the seat from 2012 to 2026. After his retirement, his son Hiroaki took over.