Map of Portsmouth, Saint John Parish, Dominica
Portsmouth is the administrative centre of Saint John Parish, Dominica, with a population of about 3,633. It lies at 15.5829°N, 61.4559°W. Portsmouth is about 32 km (20 mi) north of Roseau, the capital. The nearest city on our map is Marigot, 19 km to the east.
Portsmouth at a glance
Country
Region
Saint John Parish
Population
3,633GeoNames
Coordinates
15.5829, -61.455915°34′58″N 61°27′21″W
Time zone
America/DominicaUTC−04:00
Local time
–
Distance to Roseau
32 km (20 mi)
Where is Portsmouth?
- The 2nd largest city in Dominica by recorded population.
- Located in the Northern and Western hemispheres.
- Daylight ranges from about 11 h 12 min on the shortest day to 13 h 03 min on the longest day (around 21 December and 21 June).
Cities near Portsmouth
- Marigot — 19 km east
- Mahaut — 25 km south
- Roseau — 32 km south
- Berekua — 42 km south
- Basse-Terre — 55 km northwest, Guadeloupe
- Petit-Bourg — 69 km north, Guadeloupe
- Le Gosier — 69 km north, Guadeloupe
- Sainte-Anne — 72 km north, Guadeloupe
- Les Abymes — 77 km north, Guadeloupe
- Baie-Mahault — 77 km north, Guadeloupe
Largest cities in Dominica
Map of Dominica and all its cities →
Other places named Portsmouth
- Portsmouth — England, United Kingdom
- Portsmouth — Virginia, United States
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.