Spodnje Duplje ( or ; ) is a settlement in the Municipality of Naklo in the Upper Carniola region of Slovenia.
Spodnje Duplje was attested in historical sources as Burla in 1209, Duplach between 1205 and 1208, niderm Devplach in 1348, and Tewæpplach in 1348, among other spellings.
The local church is dedicated to Saint Vitus.