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- Scenes from the Arabian Nights story of Ali Baba and the Forty Thieves , for piano four hands for viola and piano - Georgs Pelēcis
- Scenes from the Arabian Nights story of Ali Baba and the Forty Thieves , for piano four hands -
- Scherzino , for bassoon and piano - Romualds Kalsons
- Scherzino , for trumpet and piano - Alvils Altmanis
- Sea Sonata , for clarinet in B and piano - Laura Gustovska
- Second Symphony (Spring Symphony) , for string orchestra - Vilnis Šmīdbergs
- Sen nav redzētas zvaigznes... (The Stars have not been Seen for a Long Time) , for womens choir - Ansis Sauka
- Sens nacre , for chamber ensemble - Santa Ratniece
- Septiņi mirkļi iz mūžības (Seven Moments from Eternity) , for violin and cello - Agris Engelmanis
- Seru marss roza panterai (Funeral March for a Pink Panther), musical parody , for symphony orchestra - Andris Vecumnieks
- Seven Madrigals by e.e.cummings , for mezzo-soprano, clarinet, trumpet, trombone, percussion, alto and cello - Andris Dzenītis
- Shine, shine the Sun , (SSAATB) for mixed choir - Ilze Arne
- Si minors (B Minor), cycle , for actors voice and piano - Arturs Maskats
- Sidrabiņa lietiņš lija (The Silvery Rein) , for female/children's choir (SSAA) and piano/kokle - Liene Batna (Austrina)
- Signum Magnum , for mixed choir (soli (TTTBBB), quartet I, II (SATB), mixed choir I (SSAATTBB), mixed choir II (SATB)) - Rihards Dubra
- Sinfonia Brevis , for symphony orchestra - Juris Karlsons
- Sing in the Evening, Girls! , (SSAATTBB) for mixed choir - Ilona Rupaine
- Sit at the Table, Lad , (SSAA) for womens choir - Jānis Porietis
- Sitivit anima mea (Midnight Toccata) , for organ - Andris Dzenītis
- Sitivit Anima Mea, (una sinfonia da camera) , for baritone, English horn, eight cellos and two contrabasses - Rihards Dubra
- Six Trios , for organ - Atis Stepiņš
- Skerco (Scherzo) , for cello - Maija Einfelde
- Skindu, skindu (Riga Castle Resounds) , (SATB) for mixed choir - Viktors Baštiks
- Solitude , for mezzo-soprano and electronics - Andris Dzenītis
- Solo Songs , for voice and piano - Alfrēds Kalniņš
- Solo Songs, collection , for voice and piano - Leonīds Vīgners
- Sonata , for flute and piano - Leons Amoliņš
- Sonata - Dialogue , for two flutes - Leons Amoliņš
- Sonata-Dialogue for two flutes - Leons Amoliņš
- Sonata-Meditation , for viola and piano - Maija Einfelde
- Sonāte (Sonata) , for piano - Ilona Breģe
- Song Cycle to Poems by Janis Ziemelnieks , for male choir, mezzo-soprano, bass solo and piano - Māris Lasmanis
- Song Cycle to Poems by Janis Ziemelnieks , for soli, male choir and piano -
- Song festival RĪGA 800 , mixed choir and piano -
- Songs for mixed choir, collection , with/without accompaniment for mixed choir - Jānis Lūsēns
- Songs for mixed choir, collection , for mixed choir - Ansis Sauka
- Songs of David , for soprano solo, alto saxophone and organ - Ēriks Ešenvalds
- Songs of the Annual Traditions, suite , for symphony orchestra - Romualds Kalsons
- Songs to Poems by Imants Ziedonis, cycle , for womens choir - Ansis Sauka
- Spalvas pa gaisu , for bassoon solo - Andris Vecumnieks
- Stabat mater dolorosa , for mixed choir - Andrejs Selickis
- Stanza I. 31. 12. 1999. , for string quartet and piano - Andris Dzenītis
- Stasts par saules asaram (A Tale of the Sun`s Weeping) , for kokles ensemble - Rihards Dubra
- Stencil of Time , for violoncello, electric guitar and electronic - Andris Dzenītis
- Stetit Angelus , for mixed choir (SSAATBB) - Rihards Dubra
- Stilizācijas (Stylisations) , for piano - Lija Krasinska
- Stones and Veils, concerto , for French horn and chamber orchestra - Andris Dzenītis
- String Quartet , for two violin, viola and violoncello - Maija Einfelde
- String Quartet , for string quartet - Māris Lasmanis
- String Quartet G dur Op.27 , for string quartet - Jāzeps Vītols
