Philip I
Philip 'I' may refer to:
- Philip I of Macedon
- Philip I Philadelphus
- Philip the Arab, Roman Emperor
- Philip I of France
- Philip I
- Philip I, Count of Flanders
- Philip I of Namur,
- Philip I, Count of Boulogne
- Philip I, Count of Savoy
- Philip I, Latin Emperor
- Philip IV of France, aka Philip I of Navarre
- Philip I of Piedmont, known as Philip of Savoy lord of Piedmont
- Philip I, Prince of Taranto
- Philip I, Count of Auvergne
- Philip I, Duke of Burgundy
- Philipp I, Count of Nassau-Weilburg
- Philip I, Metropolitan of Moscow
- Philipp I, Count of Katzenelnbogen
- Philip I, Duke of Brabant
- Philipp I, Count of Hanau-Lichtenberg
- Philip I de Croÿ, Count of Porcéan
- Philip I, Count of Waldeck
- Philipp I, Count of Hanau-Münzenberg
- Philip I, Duke of Brunswick-Grubenhagen
- Philip I of Castile, Philip the Handsome
- Philip I, Margrave of Baden
- Philip I, Count of Nassau-Wiesbaden-Idstein
- Philip I, Landgrave of Hesse
- Philip I, Duke of Pomerania
- Philip II of Spain, aka Philip I of Portugal, and may also be known as jure uxoris Philip I of England
- Philip I, Count of Schaumburg-Lippe