The Upper Sannian dialect (Ukrainian: Надсянський говір, romanized: Nadsianskyi hovir) is one of the dialects of the Ukrainian language, spoken in the Sian Lowland along the border with Poland.

Historically spoken well within Poland, most of its speakers were deported to the Soviet Union as part of Operation Vistula.

[2] Prior to Operation Vistula, the dialect's borders were the Strwiąż and the village of Halychany.

[4] Among the primary features of the Upper Sannian dialect is the practice of ukannye [uk], in which /ɔ/ is commonly pronounced as /u/.

[5] Other notable differences from standard Ukrainian include the pronunciation of В as /ɦ/ instead of /v/, Е as /a/ instead of /ɛ/, and Ф as /x/ instead of /f/, among others.