Miyawaka is located in the northern Chikuho region and western Naokura district of Fukuoka Prefecture.

Fukuoka Prefecture Miyawaka has a humid subtropical climate (Köppen Cfa) characterized by warm summers and cool winters with light to no snowfall.

After the Meiji restoration, the villages of Wakaymiya and Miyata were established on May 1, 1889 with the creation of the modern municipalities system.

Miyawaka has a mayor-council form of government with a directly elected mayor and a unicameral city council of 16 members.

In terms of national politics, the city is part of the Fukuoka 8th district of the lower house of the Diet of Japan.

Following the discontinuation of the JR Kyushu Miyata Line in December 1989, the city not had any passenger railway service.