Šmarčna (pronounced [ˈʃmaːɾtʃna]) is a settlement on the right bank of the Sava River in the Municipality of Sevnica in east-central Slovenia.

[2] The settlement includes the hamlet of Gomila (or Spodnji Erkenštajn, German: Unteerckenstein,[3] Untererkenstein[4]).

[5] Settlement of Šmarčna in prehistoric times is attested by Hallstatt culture finds.

In the Middle Ages, Lower Erkenstin Castle (German: Untererkenstein, Slovene: Spodnji Erkenštajn) stood in the hamlet of Gomila.

[6] The local church is dedicated to Mary Help of Christians (Slovene: Marija Pomočnica) and belongs to the Parish of Boštanj.