The following tables list all New Zealand railway tunnels in use on
31st March 1975. The notes column indicates (my limited knowledge of)
changes since then. Tunnels opened since 1975, such as the Kaimai
Tunnel, NZ's longest, and the new Porootarao tunnel, are not listed.
Tunnels on lines closed before 1975 are not listed either, except see
the table of some closed tunnels at the end. That would include
tunnels on the Nelson section, Gisborne-Moutohora branch, Rimutaka
Incline, Catlins branch, Westport harbour line and many others.
Kelburn cable-car tunnels are not listed either, nor are the many
tunnels around Wellington originally built for trams. Tunnels with
railways for which the primary purpose is not the railway, such as
water pipeline tunnels, hydro tunnels and mines, are not listed
either.
| No. | Length(m) | Name | Notes |
| 1 | 1238.20 | Tawa No. 1 | Double track |
| 2 | 4323.95 | Tawa No. 2 | Double track |
| 3 | 152.69 | Pukerua | |
| 4 | 278.02 | St. Kilda | |
| 5 | 186.48 | Seaview | |
| 6 | 244.22 | Brighton | |
| | | | Tunnel between 6 and 7 was abandoned about 1900 |
| 7 | 58.74 | Neptune | |
| 8 | 82.98 | Kaikarangi or Moa | Bypassed by Mangaonoho deviation |
| | | | Tunnel between 8 and 9 was opened out in 1970, site later bypassed by Mangaonoho deviation |
| 9 | 179.95 | Makohine | Opened out and bypassed for electrification, south portal (arch) is still intact |
| 10 | 548.79 | Mangaweka or Powhakaroa | |
| 10a | 111.85 | Mangaweka North or Kowhai | Bypassed by Mangaweka deviation |
| 10b | 76.44 | Moose | Bypassed by Mangaweka deviation |
| 10c | 174.21 | Elk or Utiku | Bypassed by Mangaweka deviation |
| 10d | 213.64 | Deer | Bypassed by Mangaweka deviation |
| 10e | 544.77 | Sandstone | Bypassed by Mangaweka deviation |
| 10f | 409.78 | Black | Bypassed by Mangaweka deviation |
| 11 | 420.04 | Beaver or Taihape | Opened out for electrification |
| 12 | 114.87 | Hedgehog | Opened out for electrification |
| 13 | 608.74 | Mataroa or Pit | |
| 14 | 112.05 | Ngaurukehu | |
| 15 | 207.20 | Hapuawhenua or Ohakune | Opened out for electrification |
| 16 | 96.16 | Upper Spiral | |
| 17 | 384.64 | Lower Spiral | |
| 18 | 1071.02 | Porootarao | Replaced by a new 1.3 km tunnel in 1980 |
| | | Mercer | Former Auckland-Marton No. 2 Opened out in 1936 |
| 19 | 596.07 | Purewa | Double track |
Some of the tunnels in the Blue Duck / Shands area are (also)
called 88-mile, Irongate, Queen Victoria Rock and Amuri Bluff, but I'm
not sure which ones are which.
| No. | Length(m) | Name | Location | Notes |
| 1 | 246 | Hunt's Road | Map | between Glenomaru and Owaka, Catlins River branch, public walkway, world's southernmost railway tunnel |
| 2 | 225 | Glenham | Map | Glenham branch, private but permission can be arranged thru Invercargill DoC Office |
| 3 | 441 | Manuka | Map | between Clarksville and Manuka, public walkway |
| 4 | 226 | Round Hill | Map | between Manuka and Waitahuna |
| 5 | 434 | Big Hill | Map | between Lawrence and Beaumont |
| | 71 | Conical Hill | Map | Tapanui branch |
| | 151 | Prices Creek | Map | between Hyde and Tiroti, Otago Central, public walkway |
| | 202 | Poolburn No. 1 | Map | Poolburn Gorge, Otago Central, public walkway |
| | 229 | Poolburn No. 2 | Map | Poolburn Gorge, Otago Central, public walkway |
| 6 | 158 | Chain Hills | Map | replaced by new tunnel |
| 7 | 865 | Caversham | Map | replaced by new tunnel |
| 8 | 101 | Blanket Bay | Map | between St Leonards and Sawyers Bay, replaced by a new tunnel |
| 9 | 68 | McGregor | Map | between Sawyers Bay and Waitati |
| 10 | 157 | Puketeraki | Map | between Seacliff and Waikouaiti |
| 11 | 314 | Raki's | Map | between Windsor Junction and Tapui |
| 12 | 261 | | Map | between Windsor Junction and Tapui |
| 13 | 189 | | Map | between Claverley and Oaro |
| | 49 | | Map | Rewanui Branch |
| | 45 | | Map | Rewanui Branch |
| | 171 | Cape Foulwind | Map | near Westport, portals covered by slips |
| | 66 | Seddonville or Chasm Creek | Map | unlined, public walkway |
| | 185 | Kawatiri or Pikomanu | Map | Nelson section, between Glenhope and Kawatiri, public walkway |
| 14 | 1352 | Belgrove or Spooners Range | Map | Nelson section, NZ's longest closed tunnel, summit altitude 303 m |
| 15 | ? | | Map | between Muri and Paekakariki |
| 16 | 121 | Cruikshanks | Map | between Upper Hutt and Mangaroa, private |
| 17 | 253 | Mangaroa | Map | between Mangaroa and Kaitoke, public walkway |
| 18 | 73 | Pakuratahi | Map | between Kaitoke and Summit, public walkway |
| 19 | 584 | Summit | Map | Rimutaka Incline, public walkway |
| 20 | 108 | Siberia | Map | Rimutaka Incline, public walkway |
| 21 | 98 | Price's | Map | Rimutaka Incline, public walkway |
| 22 | 406 | | Map | between Patiti and Beach Loop |
| 23 | 185 | | Map | Moutohora branch, between Waipoa and Te Karaka |
| 24 | 258 | | Map | Moutohora branch, between Te Karaka and Waikohu |
| 25 | 45 | | Map? | Moutohora branch, between Waikohu and Mahaki |
| 26 | 90 | | Map | Moutohora branch, between Matawai and Moutohora |
| | 83 | Kaikarangi or Moa | Map | Bypassed by Mangaonoho deviation, private |
| | 112 | Mangaweka North or Kowhai | Map | between Mangaweka and Utiku |
| | 76 | Moose | Map | between Mangaweka and Utiku |
| | 174 | Elk or Utiku | Map | between Mangaweka and Utiku, private |
| | 214 | Deer | Map | between Mangaweka and Utiku, private |
| | 545 | Sandstone | Map | between Mangaweka and Utiku, private |
| | 410 | Black | Map | between Mangaweka and Utiku, private |
| | 1071 | Porootarao | Map | replaced by a longer tunnel |
| | 1070 | Karangahake | Map | between Paeroa and Waikino, public walkway |
| 27 | 304 | Mercer | Map | between Mercer and Pokeno |
| 28 | 338 | Parnell | Map | replaced by new tunnel |
| 29 | ? | Golden Stairs | Map | between Maugaturoto and Waiotira |
| | 142 | | Map | Okaihau branch |
| | ? | | Map | between Okaihau and Rangiahua, never used |