Tōkamachi (十日町市, Tōkamachi-shi^?) is a city located in Niigata Prefecture, Japan.

As of November 31,^{[dubious – discuss]} 2010, the new city has an estimated population of 60,164. The total area of the new city is 589.92 km², including the post-Creation undefined boundary areas.

Tokamachi is home to the Tokamachi Snow Festival, which takes place every February. It is the snow festival with the oldest history in Japan.

The current mayor is Yoshifumi Sekiguchi, who was elected in May 2009.

Winter is cold and wet. An average of three meters of snow hit the city during this season. Tokamachi, like much of Japan is located in a temperate marine climate zone which provides plenty of wet weather. Although the temperature does not often drop below 0 °C (32 °F), snow is in abundance. Because Tokamachi lies in a valley, wind patterns bring in clouds from both the sea of Japan as well as the Pacific ocean. The mountains surrounding the city (though not terribly high in altitude) act as any other mountains that affect rain and snow patterns providing a barrier for cloud patters. This causes a great deal of the built up precipitation to drop on the city. The Tokamachi area receives the most snow of any area on the main island of Honshu.^{[citation needed]}