| Ilgaz 15 July Independence Tunnel Ilgaz 15 Temmuz İstiklal Tüneli | |
| Other Name: | Ilgaz Tunnel |
| Location: | Kastamonu Province – Çankırı Province |
| Crosses: | Ilgaz Mountains |
| Coordinates: | 41.0642°N 33.7375°W |
| Owner: | General Directorate of Highways |
| Traffic: | automotive |
| Length: | 5370- |
Ilgaz 15 July Independence Tunnel, shortly Ilgaz Tunnel, (tr|Ilgaz 15 Temmuz İstiklal Tüneli or Ilgaz Tüneli), is a highway tunnel through the Ilgaz Mountains between Kastamonu Province and Çankırı Province in northern Turkey. The tunnel has twin tubes of 5370m (17,620feet) and 5391m (17,687feet) in length. The tunnel was opened to traffic on December 26, 2016.
The construction cost of the tunnel was budgeted to 572 million (approx. US$200 million as of March 2016). The foundation stone laying ceremony took place on November 9, 2012. Tunnel boring works were completed on April 3, 2016.