Hanko is a port town and municipality on the south coast of Finland, 130 kilometres (80 mi) west of Helsinki. Its current population is 8,047 (31 December 2020). The town is bilingual, with a majority being Finnish speakers and a strong minority being Swedish speakers (44%).

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 town 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.