Olli Paavo Antero Kortekangas (born 16 May 1955) is a Finnish composer.
He then studied at the Sibelius Academy as a pupil of Eero Hämeenniemi and Einojuhani Rautavaara from 1974 to 1981, and completed his studies in West Berlin with Dieter Schnebel and in San Diego (UCSD) with Roger Reynolds.
Among his recent large-scale works are Seven Songs for Planet Earth, commissioned by the Choral Arts Society of Washington and the Tampere Philharmonic Orchestra, Migrations for mezzo-soprano, male voice chorus and orchestra, commissioned by The Minnesota Orchestra and recorded by BIS Records, and the song cycle Songs of Meena, commissioned by The Helsinki Philharmonic Orchestra.
Kortekangas is particularly known for his choral music and operas, of which the latest are Messenius ja Lucia (2004), Daddy's Girl (2007), One Night Stand (2011), Oma vika (Own Fault, 2015), Veljeni vartija (My Brother's Keeper, 2018), and Koria täti (2021), as well as the church operas Elämänkuvat (Pictures of Life, 2019) and Ende und Beginn (2021).
Kortekangas's work list also includes a number of chamber as well as instrumental solo works, particularly for organ and period instruments.