This article lists tunnels in Bulgaria by type. The longest railway tunnel is Koznitsa, at, and the longest road tunnel is Zheleznitsa, at .
The following is a list of the railway tunnels in Bulgaria longer than . It does not include planned, abandoned, or unfinished tunnels. The tunnels of the Sofia Metro are not included either.
| Tunnel | Length (m)[1] | Date of opening | Coordinates | ||
|---|---|---|---|---|---|
| style=text-align:right | 1962[2] | ||||
| style=text-align:right | 1951 | ||||
| style=text-align:right | 1951 | ||||
| style=text-align:right | 1950 | ||||
| style=text-align:right | 1950 | ||||
| style=text-align:right | 1948 | ||||
| style=text-align:right | 1913 | ||||
| style=text-align:right | 1913 | ||||
| style=text-align:right | 1913 | ||||
| style=text-align:right | 1913 | ||||
| style=text-align:right | 1911 | ||||
| style=text-align:right | 1911 | ||||
| style=text-align:right | 1911 | ||||
| style=text-align:right | 1930 | ||||
| style=text-align:right | 1943 | ||||
| style=text-align:right | 1943 | ||||
| style=text-align:right | 1950 |
The following is a list of the road tunnels with a length of or over. It does not include tunnels under construction.
| Tunnel | Length (m) | Date of opening | Coordinates | ||
|---|---|---|---|---|---|
| Zheleznitsa (on Struma motorway near Simitli)[3] | style=text-align:right | 2024 | |||
| Vitinya (on Hemus motorway below Vitinya Pass)[4] | style=text-align:right | 1984 | |||
| Topli Dol (on Hemus motorway near Botevgrad) | style=text-align:right | 1980s | |||
| Echemishka (on Hemus motorway near Botevgrad) | style=text-align:right | 1980s | |||
| Praveshki Hanove (on Hemus motorway near Pravets) | style=text-align:right | 1999 | |||
| Trayanovi Vrata (on Trakia motorway, below the Gate of Trajan pass) | style=text-align:right | 1970s | |||
| A tunnel on the Gabrovo Ring-road[5] [6] | style=text-align:right | 2020 | |||
| Golemo Buchino (Lyulin motorway) | style=text-align:right | 2011 | |||
| Lyaskovo (on the bypass of Tsankov Kamak)[7] | style=text-align:right | 2010 |
The Kresna Gorge Tunnel, if built, would have been Bulgaria's longest tunnel at over . It was cancelled in 2015, before construction had begun, and it will be replaced with an alternative route featuring a number of smaller tunnels.
Vitinya Tunnel, on the Hemus motorway was the longest road tunnel in the country for 40 years between its opening in 1984 and 2024. It has been surpassed by the Zheleznitsa Tunnel on the Struma motorway.