Map of Boulogne-sur-Mer, France

Boulogne-sur-Mer is a city in Hauts-de-France, France, with a population of about 47,013. It lies at 50.7249°N, 1.6137°E. Boulogne-sur-Mer is about 215 km (133 mi) north of Paris, the capital. The nearest city on our map is Calais, 30 km to the northeast.

Boulogne-sur-Mer at a glance

Where is Boulogne-sur-Mer?

• The 10th largest city in Hauts-de-France on this site.
• Located in the Northern and Eastern hemispheres.
• Daylight ranges from about 7 h 57 min on the shortest day to 16 h 30 min on the longest day (around 21 December and 21 June).

Cities near Boulogne-sur-Mer

• Calais — 30 km northeast
• Dover — 49 km northwest, United Kingdom
• Folkestone — 51 km northwest, United Kingdom
• Dunkerque — 64 km northeast
• Ramsgate — 69 km north, United Kingdom
• Ashford — 70 km northwest, United Kingdom
• Canterbury — 72 km northwest, United Kingdom
• Saint Peters — 73 km north, United Kingdom
• Hastings — 74 km west, United Kingdom
• Margate — 75 km north, United Kingdom

Largest cities in Hauts-de-France

• Lille — 238,695
• Amiens — 143,086
• Roubaix — 99,507
• Dunkerque — 86,263
• Calais — 74,433
• Villeneuve-d'Ascq — 62,400
• Saint-Quentin — 55,407
• Beauvais — 53,393
• Arras — 47,052
• Douai — 46,531

Largest cities in France

• Paris — 2,138,551
• Marseille — 877,215
• Lyon — 520,774
• Toulouse — 511,684
• Nice — 342,669
• Nantes — 325,070
• Marne La Vallée — 318,325
• Strasbourg — 274,845
• Bordeaux — 265,328
• Montpellier — 248,252

Map of France and all its cities →

Sources: place names, coordinates, populations and time zones from GeoNames (CC BY 4.0, data retrieved October 2026). Population figures are the latest values recorded in GeoNames; depending on the country they refer to the city proper, a municipality or a wider urban area, so they can differ from census or metro-area figures. Map © OpenStreetMap contributors.