| Middlesex | |
|---|---|
| Former county constituency for the House of Commons | |
| 1265–1885 | |
| Seats | two |
| Replaced by | Brentford, Ealing, Enfield, Hampstead, Harrow, Hornsey, Tottenham and Uxbridge |
| During its existence contributed to new seat(s) of: | City of London (1298) Westminster (1545) |
Middlesex was a constituency of the House of Commons of the Parliament of England, then of the Parliament of Great Britain from 1707 to 1800, then of the Parliament of the United Kingdom from 1801 until abolished in 1885. It returned two members per election by various voting systems including hustings.