Medlog is a settlement in the City Municipality of Celje in eastern Slovenia. It lies on the western outskirts of Celje. The grass runway of Celje Airport is located in the western part of the settlement. The area is part of the traditional region of Styria. It is now included with the rest of the municipality in the Savinja Statistical Region.

Celje is the fourth-largest city in Slovenia. It is a regional center of the traditional Slovenian region of Styria and the administrative seat of the City Municipality of Celje. The town of Celje is located below Upper Celje Castle at the confluence of the Savinja, Hudinja, Ložnica, and Voglajna rivers in the lower Savinja Valley, and at the crossing of the roads connecting Ljubljana, Maribor, Velenje, and the Central Sava Valley. It lies 238 m (781 ft) above mean sea level (MSL).