Niigata 1st district (新潟県第1区, Nigata dai-ikku or 新潟1区, Nigata ikku) is a constituency of the House of Representatives in the National Diet of Japan (national legislature), represented by Chinami Nishimura of the Constitutional Democratic Party of Japan since 2017.

The two candidates contesting the former 1st district, Rokuzaemon Yoshida (LDP) and Nobuyuki Sekiyama (DPJ), had continued to run until 2000.

[2] In 2012, when the Democratic Party lost the reins of government, Tooru Ishizaki, a new LDP candidate, defeated Nishimura.

In the 2017 general election, Nishimura joined the Constitutional Democratic Party,[3] and defeated Ishizaki.

In 2020, after Ishizaki was indicted for verbally and physically assaulting his secretary, he left the LDP and ran as a Nippon Ishin no Kai candidate in the 2021 elections.