Vecumnieki is a village located in Latvia within the Semigallia region. It serves as part of the Vecumnieki Parish, which falls under the jurisdiction of the Bauska Municipality.
The village is situated approximately 51 km southeast of Riga, the capital city of Latvia. Geographically, it is positioned just north of the Jelgava-Krustpils railroad. As of 2015, the population of Vecumnieki was recorded at 2,103 residents.