Muikamachi, Niigata

{{nihongo|Muikamachi|六日町|Muikamachi}} was a town located in Minamiuonuma District, Niigata Prefecture, Japan.

As of 2003, the town had an estimated population of 28,687 and a density of 108.75 persons per km². The total area was 263.79 km².

Muikamachi was a popular destination for skiers.

On November 1, 2004, Muikamachi, along with the town of Yamato (also from Minamiuonuma District), was merged to create the city of Minamiuonuma.{{Cite web |title=南魚沼市の概要 |url=https://www.city.minamiuonuma.niigata.jp/docs/5936.html |access-date=2024-02-06 |website=南魚沼市 |language=ja}}