Miyagi 1st district (Japanese: 宮城県第1区, Hepburn: Miyagi-ken Daiikku) is a single-member constituency of the House of Representatives, the lower house of the National Diet of Japan.

It is located on the island of Honshu,[2] in Miyagi Prefecture.

After rezoning in 2022, the district covers the following areas: As a result of the rezoning, the district has returned to the state it was in before 2017.

From 2017 to 2022, the district covered the following areas: As a result of the 2017 rezoning, the area of the former town of Akiu was moved into the 3rd district.

From its creation in 1994 until redistricting in 2017, the district covered the following areas: ‡ - Also ran in the Tohoku proportional representation block ‡‡ - Ran and won a seat in the Tohoku proportional representation block