Hietalahti (Swedish: Sandviken) is an unofficial district in the city of Helsinki, Finland.
Hietalahti is a southern district, bordering the seaside, situated between Ruoholahti in the west and Kamppi in the north. Main attractions in Hietalahti include Helsinki's most popular flea market, a luxurious hotel and a couple of seafood-themed restaurants. The Helsinki International Bible Center and a Hare Krishna organisation are also located in the Hietalahti-Ruoholahti area. The outdoor sculpture Olo n:o 22 can be found around the harbour basin.
Coordinates: 60°9′45″N 24°55′45″E / 60.16250°N 24.92917°E