Steyning was a parliamentary borough in Sussex, England, which elected two Members of Parliament (MPs) to the House of Commons sporadically from 1298 and continuously from 1467 until 1832.
(Between the 13th and 15th centuries, Bramber and Steyning were a single borough returning MPs to most Parliaments, sometimes called by one name and sometimes by the other, but after 1467 both were separately represented.
At the time of the Reform Act, the right to vote was exercised by the constable and all inhabitant householders paying scot and lot and not receiving alms; this was a liberal franchise for the period, though it amounted to only around 118 voters by the time the borough was abolished.
For most of the borough's existence, the majority of the qualified voters were tenants of one or two landowners, who therefore had considerable influence if not total control of the choice of MP.
The 1792 ruling on the franchise, moving the vote from the burgage holders to all the householders paying scot and lot, shifted the balance of power over to the Duke of Norfolk (who owned most of the properties that were not classed as ancient houses), and he subsequently bought out Honywood's interest.