Name
- Ommanney, Erasmus, Rear-Admiral; KCB 19021
- Ommanney, John Acworth, Admiral KCB1
- Onslow, Richard, 1st Baron Onslow, Speaker of the House of Commons1
- Orléans, Henri Eugène Philippe Louis d', Duc d'Aumale1
- Orton, Arthur, the Tichborne Claimant1
- Palmer, Roundell, 1st Baron and 1st Earl of Selborne, Lord Chancellor1
- Parke, James, Baron Wensleydale1
- Parkes, Henry, GCMG, Prime Minister of New South Wales1
- Parry, Edward, Bishop suffragan of Dover1
- Partridge, Richard, surgeon1
- Paxton, Joseph, gardener and architect1
- Peel, Arthur Wellesley, 1st Viscount Peel1
- Pelham-Clinton, Henry Pelham, 5th Duke of Newcastle1
- Percy, Hugh, formerly Smithson 2nd Duke of Northumberland1
- Phayre, Arthur Purves, Knight, administrator in Burma, 1812-18851
- Philipps, Trenham Walshman, Sec Office of Works1
- Phillpotts, Henry, Bishop of Exeter1
- Phipps, Charles Beaumont, Colonel KCB, Keeper of the Queen's Purse1
- Picton, Thomas, Lieutenant-General GCB1
- Plimsoll, Samuel, MP1