- Dieppe is a city located in the province of New Brunswick, Canada. It is situated on the eastern coast of the province, along the Gulf of St. Lawrence. Dieppe is the fourth-largest city in New Brunswick, with a population of approximately 25,384 people. The city is known for its vibrant cultural scene, beautiful beaches, and historic landmarks. Dieppe offers various recreational activities, including hiking, fishing, and boating, making it a popular destination for outdoor enthusiasts. Additionally, the city has a strong Acadian heritage and celebrates its French culture through festivals, cuisine, and language.