Vecsaule Parish (Latvian: Vecsaules pagasts) is an administrative unit of Bauska Municipality in the Semigallia region of Latvia.

Through the parish flows Lambārtes, Iecava and Mēmele River.

Battle of Saule, that took place in 1236, traditionally was identified with Šiauliai (German: Schaulen, Latvian: Šauļi) in Lithuania or with the small settlement of Vecsaule near Bauska in what is today southern Latvia.

In 2009 Vecsaule Parish was included as an administrative territory Bauska Municipality.

The largest settlements are Vecsaule (Parish Center) Jaunsaule, Kaģeni, Peat, Likverteni, Lici, Mazbrukna, Melderi, Ozolaine Petermuiza, Rīkani, Strautiņi.