Hitchin and Harpenden is a constituency^{[n 1]} represented in the House of Commons of the UK Parliament since 2017 by Bim Afolami, a Conservative.^{[n 2]}

The seat is due to be abolished for the next general election.^[2]

The constituency was created for the 1997 general election from parts of several former Hertfordshire seats. Prior to 1997, Hitchin was included in the abolished North Hertfordshire constituency and Harpenden in the St Albans constituency, while the village of Wheathampstead was part of the Welwyn Hatfield constituency.

The seat's first MP was Peter Lilley, a former Secretary of State for various government departments in the Major ministry in the 1990s, who had previously represented St Albans from 1983 to 1997. He announced he would not contest the seat at the 2017 general election.^[3] He was succeeded in 2017 by Bim Afolami of the Conservatives, who retained it at the 2019 general election, albeit with a reduced majority.

Further to the completion of the 2023 Periodic Review of Westminster constituencies, the seat will be abolished for the next general election, with its contents distributed to two new constituencies:^[2]

• Parts in the District of North Hertfordshire, including Hitchin, to be incorporated into the re-established constituency of Hitchin, which will form a cross-county boundary seat including parts of Central Bedfordshire
• Parts in the City of St Albans, including Harpenden, to be incorporated into the newly created seat of Harpenden and Berkhamsted

• List of parliamentary constituencies in Hertfordshire