The Hanko Peninsula, on which the city is located, is the southernmost tip of continental Finland. The soil is a sandy moraine, and vegetation consists mainly of pine and low shrubs, mostly Calluna. Hanko is known for its beautiful archipelago.
The city has a coastline of approximately 130 km (80 mi), of which 30 km (20 mi) are sandy beaches. There are also over 90 small islands and islets within the city limits.
The skyline of Hanko is dominated by the church and the water tower. Both of them received their current appearance after World War II, as their predecessors were either damaged or destroyed by the Soviet Armed Forces.
Scandlines serve the link between Hanko and Rostock since October 2007 four times a week with two RoRo-vessel. The trip takes some 36 hours