Ilgaz is a town in Çankırı Province in the Central Anatolia region of Turkey.
Ilgaz may also refer to:
- Ilgaz District, Çankırı Province
- Ilgaz Mountains, mountain range in northwestern Anatolia, between Çankırı and Kastamonu Provinces
- Faruk Ilgaz (1922–2014), Turkish politician
- Rıfat Ilgaz (1911–1993), Turkish poet