Hiroshima 1st district (広島県第1区, Hiroshima-ken dai-ikku or 広島1区, Hiroshima ikku) is a single-member constituency of the House of Representatives, the lower house of the National Diet of Japan.

331,786 eligible voters were registered in the district, as of 1 September 2020.

[1] This constituency was newly established in 1994 from the former 1st district.

The previous constituency elected two or more people, but this constituency elects only one person.

Fumio Kishida, former Prime Minister of Japan and President of the Liberal Democratic Party, has represented this district since October 1996.