Under the Romans, the area that would become Hunzenschwil was an extensive brickyard. The modern village of Hunzenschwil was first mentioned in 1101 as "Hintziswil". In 1201, it was mentioned as "Hunzeliswilre". In the 14th Century, the Habsburgs had the high court rights over the village, and in 1415 these rights went to Bern. The low court right was held by various owners before 1412 when it went to the Habsburg appointed Vogt at Lenzburg. In 1433, the low court rights went to Bern, and then in 1550 Hunzenschwil joined with Niederlenz, Rupperswil and Staufen to form an independent lower court.