Dieppe may refer to:
- Places
- Dieppe, Seine-Maritime, a port in Upper Normandy, France
- Dieppe Bay Town, a seaside town on Saint Kitts, was the first French settlement in the West Indies
- Dieppe, New Brunswick, a city in Canada located near Moncton, NB
- Dieppe-sous-Douaumont, a French commune in Lorraine, France
- Ships
- HMS Dieppe, two ships of the Royal Navy
- SS Dieppe, three ships of the London, Brighton and South Coast Railway
- World War II Battle
- "Dieppe", the battle honour awarded to forces participating in the Dieppe Raid, a World War II Allied attack on German forces in the French town