Cirencester was a parliamentary constituency in Gloucestershire. From 1571 until 1885, it was a parliamentary borough, which returned two Member of Parliament (MPs) to the House of Commons of the Parliament of the United Kingdom until 1868, and one member between 1868 and 1885. In 1885 the borough was abolished but the name was transferred to the county constituency in which it stood; this constituency was abolished for the 1918 general election.

George Ferrers was a courtier and writer. In an incident which arose in 1542 while he was a Member of Parliament for Plymouth in the Parliament of England, he played a key role in the development of parliamentary privilege.