Mihama has a Humid subtropical climate (Köppen Cfa) characterized by warm summers and cool winters with light to no snowfall.

[7] Mihama has a mayor-council form of government with a directly elected mayor and a unicameral town council of 10 members.

Mihama, collectively with the city of Kumano and town of Kihō, contributes two members to the Mie Prefectural Assembly.

In terms of national politics, the town is part of Mie 4th district of the lower house of the Diet of Japan.

JR Tōkai – Kisei Main Line Media related to Mihama, Mie at Wikimedia Commons