This incomplete list of tunnels in Turkey includes any road, rail, or waterway tunnel in Turkey. Tunnels are listed in decreasing order of their length.
Road tunnels
Trabzon (Maçka) - Gümüşhane (Torul), New Zigana Tunnel – 2 x 14,476 m
Rize (İkizdere) - Erzurum (İspir), Ovit Tunnel – 2 x 14,346 m
Giresun, Dereli-Şebinkarahisar, Eğribel Tunnel – 2 x 5,910 m
İstanbul, Eurasia Subsea Tunnel (subsea) – 2 x 5,400 m
Çankırı (Ilgaz) - Kastamonu, Ilgaz Tunnel – 2 x 5,391 m
Artvin, Hopa (Çavuşlu) - Borçka (Çifteköprü), T3 (3. Cankurtaran) Tunnel – 2 x 5,228 m Antalya(İbradı)-Konya(Derebucak), Demirkapı Tunnel – 2 x 5,068 m Bayburt (Aydıntepe) - Gümüşhane - Trabzon (Araklı), Salmankaş (Şehit Hamit Şahin) Tunnel – 2 x 4,150 m İzmir-Manisa, Sabuncubeli Tunnel – 2 x 4,085 m Çanakkale, Ayvacık-Küçükkuyu, T2 (Troya) Tunnel – 2 x 4,017 m Ordu, Perşembe-Fatsa, Nefise Akçelik (Hapan/Hapağan) Tunnel – 2 x 3,825 m İstanbul, Çamlıca-Libadiye Tunnel – 2 x 3,690 m Ordu Ring Road, Boztepe Tunnel – 2 x 3,313 m Rize Ring Road, Salarha Tunnel – 2 x 2,977 m Kahramanmaraş-Göksun, Ahmet Eskalen (Göksun-T2) Tunnel – 2 x 2,895 m Trabzon, Maçka New Tunnel – 2 x 2,802 m Trabzon(Maçka)-Gümüşhane(Torul), Başar Tunnel – 2 x 2,676 m Denizli, Honaz Tunnel – 2 x 2,640 m Çanakkale, Eceabat-Gelibolu, Anafartalar Tunnel – 1 x 2,560 m Kahramanmaraş-Göksun, Çağlayan Tunnel – 2 x 2,545 m Bilecik-Vezirhan, Osmangazi (Kocatepe) Tunnel – 2 x 2,474 m Trabzon, Coastal Highway, Akyazı (Yıldızlı) Tunnel – 2 x 2,472 m Malatya-Elazığ, Kömürhan Tunnel – 2 x 2,400 m İstanbul, Dolmabahçe-Bomonti Tunnel – 2 x 2,390 m Bartın, Çakraz-Kurucaşile, Dizlermezeci (T3) Tunnel – 2 x 2,350 m Mersin, Yenikaş-Gözce, Karadere Tunnels, T8 Tunnel – 2 x 2,309 m Van (Gevaş) - Bitlis (Tatvan), Kuskunkıran (Kuzgunkıran) Tunnel – 2 x 2,306 m (2nd tube projected) Artvin-Yusufeli, Oruçlu Ripage Tunnel – 1 x 2,277 m Erzurum(Uzundere)-Artvin(Yusufeli), Pirinkayalar (Lake Tortum) Tunnel – 1 x 2,272 m Giresun-Tirebolu, Tirebolu Volunteer 42nd Regiment Tunnels, Tirebolu Variant-1 (T1) Tunnel – 2 x 2,175 m Ankara (Kızılcahamam) – Çankırı (Çerkeş) Tunnel – 1 x 2,071 m Ordu Ring Road, Öceli Tunnel – 2 x 2,034 m İstanbul, Sarıyer-Çayırbaşı Tunnel – 2 x 2,025 m Sinop-Boyabat, Ahmet Muhip Dıranas Tunnel – 1 x 2,016 m Ordu, Ünye Bypass Road, Yunus Emre (Saca) Tunnel – 2 x 1,996 m Bitlis Bypass Road, T1 (8 August/Bitlis) Tunnel – 2 x 1,947 m Bartın, Çakraz-Kurucaşile, Çakraz (T1) Tunnel – 2 x 1,936 m Ordu, Mesudiye (Pınarlı-Topçam), T2 (Topçam) Tunnel – 1 x 1,920 m Trabzon, Araklı-Arsin, Araklı (Konakönü) Tunnel – 2 x 1,906 m Giresun (Doğankent) - Gümüşhane (Kürtün), Güvenlik (Doymuş) Tunnel – 1 x 1,835 m Malatya (Doğanşehir) - Adıyaman (Gölbaşı), Erkenek Tunnel – 2 x 1,830 m Ordu, Altınordu (Gümüşköy) - Mesudiye (Pınarlı), T10 (Çağlayan) Tunnel – 1 x 1,767 m Trabzon (Maçka) - Gümüşhane (Torul), Old Zigana Tunnel – 1 x 1,702 m Çanakkale, Ayvacık-Küçükkuyu, T1 (Assos) Tunnel – 2 x 1,693 m Sinop-Gerze, Demirciköy Tunnel – 2 x 1,680 m İzmir, Konak Tunnel – 2 x 1,674 m Karaman (Taşkent) - Antalya (Alanya), Çayarası-3 Tunnel – 1 x 1,671 m Sivas, Ulaş-Kangal, Yağdonduran Tunnel – 2 x 1,650 m İstanbul, Kağıthane-Piyalepaşa Tunnel – 2 x 1,625 m Malatya, Akçadağ-Darende, Karahan Tunnel – 2 x 1,600 m Bartın, Çakraz-Kurucaşile, Cumayanı (T2) Tunnel – 2 x 1,600 m Sinop (Gerze) - Samsun (Yakakent), Yenikent Tunnel – 2 x 1,598 m Mersin, Silifke-Aydıncık, Boğsak Tunnel - 2 x 1,573 m Zonguldak-Kilimli, Mithatpaşa-2 (Prof Dr.