Reading West was a constituency^{[n 1]} represented in the House of Commons of the UK Parliament.^{[n 2]}

Further to the completion of the 2023 Periodic Review of Westminster constituencies, the seat was abolished. Its area was transferred to the new constituencies of Earley and Woodley (Whitley ward), Reading Central (Battle, Minster and Southcote wards), and Reading West and Mid Berkshire (all other wards). These constituencies were first contested at the 2024 general election.^{[n 3][3][4][5]}

Since its 1983 creation the constituency was a bellwether paradigm example of a marginal seat. Boundary changes for the 2010 election took in areas of population expansion to the east in new largely private sector housing estates. Unemployment is close to the regional average, which is lower than the national average^[6] and the constituency has seen a marked increase in properties and property prices throughout the 2001 to 2011 period which saw town centre regeneration and investment by a Labour Party-controlled council enhanced by Reading railway station hub improvements and enterprise areas equally.

The Reading West parliamentary constituency was first contested in 1983, when it was won by a member of the Conservative Party, Tony Durant, the sitting MP for the abolished Reading North constituency. He held the seat through two subsequent general elections until he retired at the 1997 election.

The constituency was then won by Martin Salter for Labour, as part of the landslide that brought Labour back to power under Tony Blair. Salter held the seat through the 13 years of Labour government until Parliament was dissolved in April 2010, but did not stand in the 2010 general election, when Alok Sharma won the seat for the Conservatives.

Sharma held several posts within government, including serving in the Cabinet as the President for COP26 from January 2021 until October 2022.

1983–1997

• The Borough of Reading wards of Battle, Katesgrove, Kentwood, Minster, Norcot, Southcote, and Tilehurst; and
• The District of Newbury wards of Calcot, Pangbourne, Purley, Theale, and Tilehurst.^[7]

Formed as a county constituency, largely from parts of the abolished constituency of Reading North. Extended westwards to include parts of Newbury.

1997–2010

• The Borough of Reading wards of Battle, Kentwood, Minster, Norcot, Southcote, Tilehurst, and Whitley; and
• The District of Newbury wards of Calcot, Pangbourne, Purley, Theale, and Tilehurst.^[8]

The boundary with Reading East was realigned, gaining Whitley ward and losing Katesgrove ward.

2010–2024

• The Borough of Reading wards of Battle, Kentwood, Minster, Norcot, Southcote, Tilehurst, and Whitley; and
• The District of West Berkshire wards of Birch Copse, Calcot, Pangbourne, Purley on Thames, Theale, and Westwood.^[9]

Marginal changes due to revision of local authority wards.

The constituency was bordered by the seats of Newbury, Henley, Reading East, and Wokingham.^[10]

• List of parliamentary constituencies in Berkshire