The siege of Basing House near Basingstoke in Hampshire, was a Parliamentarian victory late in the First English Civil War. Whereas the title of the event may suggest a single siege, there were in fact three major engagements. John Paulet, 5th Marquis of Winchester owned the House and as a committed Royalist garrisoned it in support of King Charles I, as it commanded the road from London to the west through Salisbury.