Yachiyo is located in the western part of Ibaraki prefecture, almost in the center of the Kanto Plain.

The Kinugawa River flows through the town, Ibaraki Prefecture Yachiyo has a Humid continental climate (Köppen Cfa) characterized by warm summers and cool winters with little snowfall.

[2] Per Japanese census data,[3] the population of Yachiyo has remained relatively stable over the past 70 years.

Yachiyo has a mayor-council form of government with a directly elected mayor and a unicameral town council of 14 members.

In terms of national politics, the town is part of Ibaraki 7th district of the lower house of the Diet of Japan.