Situated in the southeast corner of Saitama Prefecture, Soka is surrounded to the east by the cities of Yashio, Misato and Yoshikawa, and to the west by Kawaguchi.
Soka, once a peaceful agricultural area surrounded by water and greenery, lies in the Nakagawa-ayase basin, an area referred to as the Nakagawa-teichi district.
On November 1 of the 33rd year of the Showa Era(1958) Soka was incorporated as a city with a population of 34,878.