is a city located in Saitama Prefecture, Japan. , the city had an estimated population of 55,294 in 24,328 households and a population density of 1200 persons per km<sup>2</sup>. The total area of the city is .
Hidaka is located in south-central Saitama Prefecture.
Hidaka has a Humid subtropical climate (Köppen Cfa) characterized by warm summers and cool winters with light to no snowfall. The average annual temperature in Hidaka is . The average annual rainfall is with September as the wettest month. The temperatures are highest on average in August, at around , and lowest in January, at around .
Per Japanese census data, the population of Hidaka has remained relatively stable over the past 30 years.
The area of modern-day Hidaka was part of ancient Koma District, Musashi Province, mentioned in records dating from 716 AD as a place of resettlement for refugees from the Tang invasion of the Kingdom of Goguryeo on the Korean peninsula in 668 AD. During the Edo period, the area developed as Takahagi-shuku, a post station on the Nikkà  Wakià Âkan highway linking Edo with Nikkà Â. The three villages of Komagawa, Koma and Takahagi were established within Koma District with the establishment of the modern municipalities system on April 1, 1889. In 1896 Koma District was abolished, becoming part of Iruma District. On February 11, 1955, Komagawa and Koma merged to create the town of Hidaka. Takahagi joined Hidaka on September 20, 1956. Hidaka was elevated to city status on October 1, 1991.
Hidaka has a mayor-council form of government with a directly elected mayor and a unicameral city council of 16 members. Hidaka contributes one member to the Saitama Prefectural Assembly. In terms of national politics, the city is part of Saitama 9th district of the lower house of the Diet of Japan.
The economy of Hidaka remains primarily agricultural, with some light manufacturing. A number of housing districts have been built near the train stations, as the city is increasing a bedroom community for Tokyo metropolis to the south.
JR East â Hachikà  Line
JR East â Kawagoe Line
Seibu Railway - Seibu Ikebukuro Line