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| Location | Type | Status | Length | Photos | Distance | Between |
| Belmont Branch | ||||||
| Redhead Tunnel | Single | Closed | 181m | 10 | ??? | Adamstown and Fernleigh Loop |
| Blayney - Demondrille Line | ||||||
| Carcoar Tunnel | Single | In Use | 281m | 2 | 310.6 km | Carcoar and Coombing Siding |
| Bombala Line | ||||||
| Brooks Bank Tunnel | Single | In Use | 292m | 1 | 302.6 km | Bungendore Junction and Farrer |
| Pine Range No 1 Tunnel | Single | In Use | 165m | 1 | 314.1 km | Burbong and Pine Range No 2 Tunnel |
| Pine Range No 2 Tunnel | Single | In Use | 243m | 316.0 km | Pine Range No 1 Tunnel and Queanbeyan | |
| Colinton Tunnel | Single | Closed | 161m | ??? | Colinton and Bredbo | |
| Box Vale Colliery Branch | ||||||
| Box Vale Tunnel | Single | Closed | 6 | ??? | Jct (Box Vale Colliery Line) and Box Vale Colliery | |
| Dombarton - Maldon Line | ||||||
| Avon Tunnel | Single | Not Opened | 4000m | 1 | ??? | Jct (Dombarton) and Jct (Maldon) |
| Dorrigo Branch | ||||||
| Tunnel No 1 | Single | In Use | ??? | Glenreagh and Tunnel No 2 | ||
| Tunnel No 2 | Single | In Use | ??? | Tunnel No 1 and Timber Top | ||
| Gulgong - Mary Vale Line | ||||||
| Tunnel No 5 | Single | Not Opened | ??? | Goolma and Spicers Creek | ||
| Gwabegar Line | ||||||
| Capertee Tunnel | Single | In Use | 205m | 2 | 204.9 km | Ben Bullen and Capertee |
| Carlos Gap Tunnel | Single | In Use | 382m | 2 | 223.1 km | Carlos Gap and Vulcan |
| Main North Line | ||||||
| Boronia No 1 Tunnel | Double | In Use | 422m | 50.8 km | Cowan and Boronia No 2 Tunnel | |
| Boronia No 2 Tunnel | Double | In Use | 602m | 1 | 51.8 km | Boronia No 1 Tunnel and Boronia No 3 Tunnel |
| Boronia No 3 Tunnel | Double | In Use | 141m | 54.5 km | Boronia No 2 Tunnel and Boronia No 4 Tunnel | |
| Boronia No 4 Tunnel | Double | In Use | 74m | 54.7 km | Boronia No 3 Tunnel and Boronia No 5 Tunnel | |
| Boronia No 5 Tunnel | Double | Closed | 74m | 2 | ??? | Boronia No 4 Tunnel and Hawkesbury River |
| Long Island Tunnel (1st) | Double | Closed | ??? | Long Island and Long Island Tunnel | ||
| Long Island Tunnel | Double | In Use | 263m | 1 | 58.6 km | Long Island Tunnel (1st) and Hawkesbury Bridge Platform |
| Mullet Creek Tunnel | Double | In Use | 456m | 59.3 km | Hawkesbury Bridge Platform and Wondabyne | |
| Woy Woy Tunnel | Double | In Use | 1770m | 1 | 67.1 km | Mullet Creek and Woy Woy |
| Tickhole Tunnel | Double | In Use | 205m,153m | 157.6 km | Cardiff and Kotara | |
| Ardglen Tunnel | Single | In Use | 488m | 3 | 362.3 km | Pangela and Ardglen |
| Limbri Tunnel | Single | In Use | 151m | 1 | 485.2 km | Limbri and Danglemah |
| Main South Line | ||||||
| Engine Dive | Single | In Use | 1.2 km | Central Goods Junction and Redfern | ||
| Picton Tunnel | Double | In Use | 183m | 2 | 87.7 km | Jct (Picton) and Redbank Tunnel |
| Redbank Tunnel | Double | In Use | 315m | 92.4 km | Picton Tunnel and Tahmoor | |
| Yerrinbool Tunnel | Double | In Use | 247m | 116.6 km | Yerrinbool and Aylmerton Tunnel | |
| Aylmerton Tunnel | Double | In Use | 920m | 122.3 km | Yerrinbool Tunnel and Aylmerton | |
| The Gib Tunnel (1st) | Single | Re-used | 1 | 122.3 km | Jct (Box Vale Colliery Line) and The Gib Tunnel | |
| The Gib Tunnel | Double | In Use | 516m | 2 | 134.6 km | The Gib Tunnel (1st) and Bowral |
| Bethungra Spiral No 1 Tunnel | Single | In Use | 68m | 2 | 454.9 km | Tanyinna and Bethungra Spiral No 2 Tunnel |
| Bethungra Spiral No 2 Tunnel | Single | In Use | 75m | 2 | 455.0 km | Bethungra Spiral No 1 Tunnel and Bethungra |
| Main Western Line | ||||||
| Clarence Tunnel | Single | In Use | 494m | ??? | Clarence (1st) and Edgecombe | |
| Zig Zag Tunnel | Single | In Use | ??? | Top Points and Bottom Points | ||
| Glenbrook Tunnel (1st) | Single | Closed | 4 | ??? | Lapstone Bottom Points and Glenbrook (1st) | |
| Glenbrook Tunnel | Double | In Use | 283m | 2 | 65.2 km | Lapstone and Glenbrook |
| Zig Zag No 1 Tunnel | Double | In Use | 523m | 2 | 145.8 km | Clarence and Zig Zag No 2 Tunnel |
| Zig Zag No 2 Tunnel | Double | In Use | 111m | 1 | 146.8 km | Zig Zag No 1 Tunnel and Zig Zag No 3 Tunnel |
| Zig Zag No 3 Tunnel | Double | In Use | 174m | 2 | 147.2 km | Zig Zag No 2 Tunnel and Zig Zag No 4 Tunnel |
| Zig Zag No 4 Tunnel | Double | In Use | 404m | 1 | 147.5 km | Zig Zag No 3 Tunnel and Zig Zag No 5 Tunnel |
| Zig Zag No 5 Tunnel | Double | In Use | 165m | 2 | 148.0 km | Zig Zag No 4 Tunnel and Zig Zag No 6 Tunnel |
| Zig Zag No 6 Tunnel | Double | In Use | 182m | 2 | 148.2 km | Zig Zag No 5 Tunnel and Zig Zag No 7 Tunnel |
| Zig Zag No 7 Tunnel | Double | In Use | 224m | 1 | 148.5 km | Zig Zag No 6 Tunnel and Zig Zag No 8 Tunnel |
| Zig Zag No 8 Tunnel | Double | In Use | 171m | 1 | 148.9 km | Zig Zag No 7 Tunnel and Zig Zag No 9 Tunnel |
| Zig Zag No 9 Tunnel | Double | In Use | 78m | 2 | 149.2 km | Zig Zag No 8 Tunnel and Zig Zag No 10 Tunnel |
| Zig Zag No 10 Tunnel | Double | In Use | 790m | 1 | 149.5 km | Zig Zag No 9 Tunnel and Zig Zag |
| Marrangaroo Tunnel | Double | In Use | 974m | 1 | 164.8 km | Jct (Start Marrangaroo Deviation) and Jct (End Marrangaroo Deviation) |
| Murwillumbah Branch | ||||||
| Naughtons Gap Tunnel | Single | Closed | 265m | 815.7 km | Naughtons Gap and Bungabbee | |
| Booyong Tunnel | Single | Closed | 130m | 855.3 km | Laureldale and Booyong Junction | |
| Fords Gap Tunnel | Single | Closed | 78m | 900.2 km | Mullumbimby and Morrisons Hill Tunnel | |
| Morrisons Hill Tunnel | Single | Closed | 381m | 902.3 km | Fords Gap Tunnel and Haynes Hill Tunnel | |
| Haynes Hill Tunnel | Single | Closed | 96m | 904.3 km | Morrisons Hill Tunnel and Billinudgel | |
| Marshalls Hill Tunnel | Single | Closed | 87m | 4 | 905.6 km | Billinudgel and Yelgun |
| Bamberry Hill Tunnel | Single | Closed | 172m | 3 | 909.2 km | Yelgun and Crabbes Creek |
| Hull Hill Tunnel | Single | Closed | 55m | 912.1 km | Crabbes Creek and Mooball | |
| Burringbar Range Tunnel | Single | Closed | 524m | 3 | 921.0 km | Upper Burringbar and Stokers |
| Newnes Line | ||||||
| Newnes No 1 Tunnel | Single | Closed | 177m | 177.2 km | Deane and Newnes No 2 Tunnel | |
| Newnes No 2 Tunnel | Single | Closed | 180m | 1 | 180.4 km | Newnes No 1 Tunnel and Constance |
| North Coast Line | ||||||
| Wallarobba Tunnel | Single | In Use | 304m | 1 | 228.3 km | Hilldale and Telegherry |
| Monkerai Tunnel | Double | In Use | 755m | 1 | 254.7 km | Monkerai and Nooroo |
| Bulliac Tunnel | Single | In Use | 223m | 321.5 km | Pitlochry and Bulliac | |
| Wauchope Tunnel | Single | In Use | 65m | 447.8 km | Kerewong and Wauchope | |
| Repton Tunnel | Single | In Use | 110m | 588.6 km | Repton and Archville | |
| Red Hill No 1 Tunnel | Single | In Use | 92m | 615.4 km | North Coffs Harbour and Red Hill No 2 Tunnel | |
| Red Hill No 2 Tunnel | Single | In Use | 208m | 1 | 617.0 km | Red Hill No 1 Tunnel and Red Hill No 3 Tunnel |
| Red Hill No 3 Tunnel | Single | In Use | 261m | 617.6 km | Red Hill No 2 Tunnel and Red Hill No 4 Tunnel | |
| Red Hill No 4 Tunnel | Single | In Use | 121m | 618.1 km | Red Hill No 3 Tunnel and Red Hill No 5 Tunnel | |
| Red Hill No 5 Tunnel | Single | In Use | 273m | 618.6 km | Red Hill No 4 Tunnel and Landrigans | |
| Cougal Spiral No 1 Tunnel | Single | In Use | 192m | 5 | 872.0 km | Cougal and Cougal Spiral No 2 Tunnel |
| Cougal Spiral No 2 Tunnel | Single | In Use | 177m | 1 | 872.7 km | Cougal Spiral No 1 Tunnel and Border Loop |
| Border Tunnel | Single | In Use | 1100m | 3 | 875.5 km | Border Loop and Queensland Border |
| North Shore Line | ||||||
| North Sydney Tunnel | Quad | In Use | 422m | 1 | 5.4 km | North Sydney and Waverton |
| Bay Road Tunnel | Double | In Use | 144m | 2 | 6.4 km | Waverton and Wollstonecraft |
| North Sydney Car Sidings | ||||||
| Lavender Bay Tunnel | Double | In Use | 310m | 7.0 km | Waverton and North Sydney Car Sidings | |
| Picton Loop Line | ||||||
| Old Main Tunnel | Single | Closed | 181m | 2 | ??? | Jct (Picton) and Thirlmere |
| Richmond Vale Railway | ||||||
| Richmond Vale No 1 Tunnel | Single | Closed | 3 | ??? | Stockrington No 1 Colliery and Sugarloaf Tunnel | |
| Sugarloaf Tunnel | Single | Closed | 1 | ??? | Richmond Vale No 1 Tunnel and Six Mile Loop | |
| Richmond Vale No 3 Tunnel | Single | Closed | 2 | ??? | De Sallis Siding and Richmond Vale Junction | |
| Rozelle - Darling Harbour Goods Line | ||||||
| Glebe Road Tunnel | Double | Re-used | 745m | 3 | ??? | Balmain Road Junction and John Street Tunnel |
| John Street Tunnel | Double | Re-used | 124m | 2 | ??? | Glebe Road Tunnel and Darling Island |
| Sandy Hollow - Gulgong Line | ||||||
| Coxs Gap No 1 Tunnel | Single | In Use | 761m | 3 | 366.5 km | Kerrabee and Coxs Gap No 2 Tunnel |
| Coxs Gap No 2 Tunnel | Single | In Use | 410m | 368.3 km | Coxs Gap No 1 Tunnel and Bylong Tunnel | |
| Bylong Tunnel | Single | In Use | 1975m | 3 | 375.1 km | Coxs Gap No 2 Tunnel and Bylong Loop |
| Wollar Gap Tunnel | Single | In Use | 376m | 1 | 408.9 km | Akuna and Wollar |
| South Coast Line | ||||||
| Illawarra Dive | Double | In Use | 1.7 km | Illawarra Junction and Erskineville | ||
| Arncliffe Tunnel | Double | Closed | 8.8 km | Arncliffe and Banksia | ||
| Waterfall Tunnel | Single | Closed | 221m | 2 | ??? | Waterfall and South Waterfall Temporary Junction |
| Cawley Tunnel | Single | Closed | 381m | 6 | ??? | Cawley and Helensburgh Temporary Junction |
| Helensburgh Tunnel (1st) | Single | Closed | ??? | Helensburgh Temporary Junction and Helensburgh (1st) | ||
| Metropolitan Tunnel (1st) | Single | Closed | ??? | Helensburgh (1st) and Lilyvale No 1 Tunnel | ||
| Lilyvale No 1 Tunnel | Single | Closed | 80m | ??? | Metropolitan Tunnel (1st) and Lilyvale No 2 Tunnel | |
| Lilyvale No 2 Tunnel | Single | Closed | 322m | ??? | Lilyvale No 1 Tunnel and Lilyvale (1st) | |
| Otford Tunnel | Single | Re-used | 565m | ??? | Otford and Stanwell Park (1st) | |
| Clifton Tunnel | Single | In Use | 1001m | 60.3 km | Coal Cliff South and Clifton | |
| Croom Tunnel | Single | In Use | 40m | 106.8 km | Oak Flats and Dunmore/Shellharbour | |
| Kiama Tunnel | Single | In Use | 472m | 118.2 km | Bombo and Kiama | |
| Omega No 1 Tunnel | Single | In Use | 373m | 121.7 km | Kiama and Omega No 2 Tunnel | |
| Omega No 2 Tunnel | Single | In Use | 199m | 122.5 km | Omega No 1 Tunnel and Omega No 3 Tunnel | |
| Omega No 3 Tunnel | Single | In Use | 326m | 123.8 km | Omega No 2 Tunnel and Omega No 4 Tunnel | |
| Omega No 4 Tunnel | Single | In Use | 322m | 124.5 km | Omega No 3 Tunnel and Omega | |
| Helensburgh Tunnel | Double | In Use | 456m | 47.6 km | Helensburgh and Metropolitan Tunnel | |
| Metropolitan Tunnel | Double | In Use | 133m | 48.4 km | Helensburgh Tunnel and Metropolitan Colliery Junction | |
| Lilyvale Tunnel | Double | In Use | 260m | 49.7 km | Metropolitan Colliery Junction and Lilyvale | |
| Bald Hill Tunnel | Double | In Use | 289m | 54.4 km | Otford and Stanwell Park | |
| Stanwell Park Tunnel | Double | In Use | 117m | 56.5 km | Stanwell Park and Stanwell Creek Tunnel | |
| Stanwell Creek Tunnel | Double | In Use | 277m | 57.1 km | Stanwell Park Tunnel and Coal Cliff | |
| Unanderra - Moss Vale Line | ||||||
| Illawarra No 1 Tunnel | Single | In Use | 188m | 1 | 99.2 km | Jct (Dombarton) and Illawarra No 2 Tunnel |
| Illawarra No 2 Tunnel | Single | In Use | 628m | 4 | 102.6 km | Illawarra No 1 Tunnel and Summit Tank |
