O.S.T.R. (born Adam Andrzej Ostrowski on 15 May 1980 in Łódź) is a Polish rapper, record producer and audio engineer who has been one of the most consistent voices in Polish hip-hop since the mid-1990s. A graduate of the Academy of Music in Łódź - violin class - he is among the very few Polish rappers with formal conservatory training, which shapes his jazz-inflected production style. Active as a solo artist since 1997, he has released over twenty albums on his own Tabasko Nagrania label and collaborated with American artists such as Evidence, El Da Sensei and producer Marco Polo.
O.S.T.R. released his album '404' on 12 December 2025 via Tabasko Nagrania - 18 tracks, fully self-produced with no guest features.
O.S.T.R. headlined a 25th-anniversary career show at Atlas Arena in Łódź, performing the full 'Tabasko' album with guests at 120 RAP FEST III.
O.S.T.R. performed at the ING Silesia Beats festival in Chorzów's Śląski Park.
O.S.T.R. played a concert in New York at the Now & Then club in Brooklyn.
O.S.T.R. and rapper ELDO launched 'Trasa Specjalna vol. II', a joint 2026 tour covering 11 Polish cities.
😴 Nothing scheduled with this artist in the near future.
92festivalFri 20.11.Wrocław Hip Hop Festival 2026
88concertSat 24.10.Red Bull 64 Bars Live
87concertSat 19.12.Kaz Bałagane | Fish & Tits | Gdańsk
86concertFri 23.10.Fokus & Rahim - Katharsis Tour
84concertFri 13.11.Kaz Bałagane | Fish & Tits | Wrocław
83concertSat 17.10.Guzior: WIDMO TOUR
80concertSat 26.9.GUZIOR & KAZ BAŁAGANE | BYDGOSZCZ
80concertFri 4.12.Guzior
77concertTue 20.10.Zakopower XX MIUOSH
77concertSun 13.12.Rów Babicze
75concertSat 7.11.Fokus & Rahim - Katharsis Tour
74concertSun 25.10.SPIĘTY / WY I ONI – Special Concert feat. FISZ, KORTEZ, BŁAŻEJ KRÓL
Concert by Polish rapper O.S.T.R. at the HUTA club in Wrocław. An energetic hip-hop evening with one of Poland's leading artists in the genre.
A live concert by O.S.T.R., one of Poland's most acclaimed hip-hop artists, at the Cukrownia Żnin venue.