[2] Per Japanese census data,[3] the population of Kiyosu has grown steadily over the past 60 years.

In the Muromachi period, the area was fortified with the construction of Kiyosu Castle, which subsequently became a stronghold of the Oda clan and the base from which Oda Nobunaga consolidated his control over Owari Province during the Sengoku period.

After the start of the Edo period, Kiyosu Castle was dismantled by order of Tokugawa Ieyasu, and most of the population relocated to Nagoya.

[4] Kiyosu has a mayor-council form of government with a directly elected mayor and a unicameral city legislature of 22 members.

In terms of national politics, the city is part of Aichi District 5 of the lower house of the Diet of Japan.