Bilje (; ) is a settlement east of Miren in the Municipality of Miren-Kostanjevica in the Littoral region of Slovenia. The hill known as Miren Castle () rises above the settlement to the south.
The parish church in the settlement is dedicated to Saint Anthony the Hermit and belongs to the Diocese of Capodistria.
Bilje is the birthplace of the sculptor Negovan Nemec, the philosopher Dean Komel, and the pianist, music educator, and professor Damjana Bratuà ¾.