| Fredrikinkatu Fredriksgatan | |
| Alternate Name: | Freda |
| Owner: | City of Helsinki |
| Location: | Helsinki, Finland |
| Postal Code: | 00100, 00120[1] |
| Direction A: | north |
| Status: | In use |
Fredrikinkatu (Swedish: Fredriksgatan, Helsinki slang: Freda) is a street in Helsinki, Finland that starts from Viiskulma in the district of Punavuori and continues north by the western side of Kamppi Center until it reaches Lutherinkatu and the Temppeliaukio Church in Etu-Töölö.
Fredrikinkatu is mostly a northbound one-way street. Helsinki tram lines 1 and 3 run on Fredrikinkatu in both directions between Viiskulma and Bulevardi. There's a disused section of tram track between Urho Kekkosen katu and Arkadiankatu.
The majority of the buildings along Fredrikinkatu are full of small shops and boutiques, especially in the area between Iso Roobertinkatu and Eerikinkatu.