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

The Old Town of Vecumnieki historically has been home to the Drächen Manor ( Gut Drakken ), the Mansion Manor ( Gut Mißhof ), the Reschenhof Manor, the (Gut Wiexten, in Umparte ), Vecmuiža (Neugut, in Vecumnieki).

Until 1940 the parish was called Vecmuižas pagasts.

In 1977, small areas were exchanged with Birzgale Parish.

In 2009, the parish was included as one of the administrative territories of the Vecumnieki Municipality.