Eastwood was a county constituency represented in the House of Commons of the Parliament of the United Kingdom from 1983 until 2005. It elected one Member of Parliament (MP) by the first-past-the-post system of election.

The constituency was created for the 1983 general election, when it partially replaced the former East Renfrewshire constituency, following changes in 1975 to local government boundaries.

The East Renfrewshire constituency was re-established for the 2005 general election, with the same boundaries as the Eastwood constituency. Despite the change of name, it is the only constituency in mainland Scotland whose boundaries were unchanged by the 2005 revision of Scottish constituencies.

In 1999, an Eastwood Scottish Parliament constituency was created with the name and boundaries of the Eastwood Westminster constituency. However, while this constituency still exists, its boundaries are now different from the East Renfrewshire UK Parliament seat.

The constituency lay to the south of Glasgow and included Clarkston, Newton Mearns, Eaglesham, Barrhead and Neilston.

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