Legislative Yuan constituencies in Hsinchu County

Hsinchu County electoral constituencies () consist of 2 single-member constituencies, each represented by a member of the Republic of China Legislative Yuan. From the 2020 legislative election onwards, the number of Hsinchu County's seats was increased to 2 due to the county's increase in population, as it exceeded the 315,019 average for each constituency.
Legislators.
 Chiu Ching-chun resigned in 2009 after his election as Hsinchu County magistrate.