Saide
Salantas
Salcia
Salpe
Saltuona
Sanzile channel
Saria
Sausdravas
Seimena
Seira
Serksne
Sesupe
Sesuva
Sesuvis
Siause
Siesartis
Simsa
Sirvinta (the river Sesupe catchment area)
Sirvinta (the river Sventoji catchment area)
Skroblus
Spengla (the river Merkys catchment area)
Spengla (the river Zeimena catchment area)
Srove
Sruoja
Stirnele
Streva
Sunija
Suoja
Susve
Sventoji
Sventoji (Baltic Sea)
Sysa
