Veliko Mlačevo (pronounced [ˈʋeːlikɔ ˈmlaːtʃɛʋɔ]; German: Großmlatschevo[2]) is a village in the Municipality of Grosuplje in central Slovenia.

[7][8] Before the Second World War, Veliko Mlačevo had a population of 156 people living in 28 houses.

[9] The local church is dedicated to Saint Martin and belongs to the Parish of Žalna.

It is originally a 14th-century Gothic building that was heavily remodeled in the Baroque style in the 18th century.

The church has an early Baroque high barrel-vaulted nave complemented by 18th-century altar furnishings.