尼扬扎省（英文：Nyanza Province）是肯尼亚8省之一，首府基苏木 (英文:Kisumu).

尼扬扎省分为18个县：

Bondo District

Borabu District

Gucha District

Homa Bay District

Kisii Central District

Kisumu East District

Kisumu West District

Kuria District

Manga District

Masaba District

Migori District

Nyamira District

Nyando District

Rachuonyo District

Rarieda District

Rongo District

Siaya District

Suba District