This is a list of viaducts and significant bridges of Thailand's railways, past and present.

0–9

• 100-metres Bridge, Prachuap Khiri Khan Province

A

B

• Ban Mai Bridge, Nakhon Sawan Province
• Ban Phai Elevated Railway, Khon Kaen Province
• Bangkok Elevated Road and Train System viaduct (incompleted), Bangkok and Pathum Thani Province
• Bang Mun Nak Bridge, Phichit Province
• Bang Pakong River Railway bridge, Chachoengsao Province
• Bang Saphan River Railway bridge, Prachuap Khiri Khan Province
• Bridge near Prachantakham railway station, Prachinburi Province
• Bueng Boraphet Railway bridge, Nakhon Sawan Province
• BTS Skytrain viaduct, Bangkok

• 
  Bangkok Elevated Road and Train System viaduct between Bang Sue and Don Muang
• 
  BTS Skytrain viaduct

C

• Chakri Railway bridge, crossing Pa Sak River, Phra Nakhon Si Ayutthaya Province
• Chawang River Railway bridge, Nakhon Si Thammarat Province
• Chi River Railway bridge, Khon Kaen Province
• Chulachomklao bridge, or Ban Don Bridge, Tha Kham Bridge, Surat Thani Bridge, Surat Thani Province
• Chulalongkorn Railway bridge, crossing Mae Klong River, Ratchaburi Province
• Composite Bridge, using instead of Pang La Bridge, Lampang Province

• 
  Chulachomklao bridge

D

• Dong Ta Khob Bridge, Phichit Province

E

F

G

• Guang River Railway bridge, Lamphun Province

H

• Hanuman River Railway bridge, Prachinburi Province
• Hua Dong Bridge, Phichit Province
• Hua Hin Elevated Railway, Prachuap Khiri Khan Province (Under Construction)
• Huai Chorakhemak Railway bridge, Buriram Province
• Huai Kha Yung Railway bridge, Si Sa Ket Province
• Huai Mae Ta Bridge, crossing Yom River, Phrae Province
• Huai Samran Railway bridge, Si Sa Ket Province
• Huai Thap Than Railway bridge, Surin Province

I

J

K

• Khlong Bangkok Noi Railway bridge, Bangkok
• Khlong Bang Khen Railway bridge, Bangkok
• Khlong Bang Prong Bridge, Nakhon Sawan Province
• Khlong Bang Ra Mat Bridge, Bangkok
• Khlong Bang Sue Railway bridge, Bangkok
• Khlong Chan Dee Bridge, Nakhon Si Thammarat Province
• Khlong Cholaprathan Anusatsananun Bridge, Nakhon Sawan Province
• Khlong Chorakhephuek Bridge, Nakhon Sawan Province
• Khlong Ka Mang Railway bridge, Phra Nakhon Si Ayutthaya Province
• Khlong Luek Bridge, near the Cambodia border, Sa Kaeo Province
• Khlong Pla Kot Bridge, Nakhon Sawan Province
• Khlong Rang Sit Railway bridge, Pathum Thani Province
• Khlong Sam Sen Railway bridge, Bangkok
• Khlong Tha Lo Bridge, Phichit Province
• Khlong Tha Luang Bridge, Phichit Province
• Khlong Yan Railway bridge, Surat Thani Province
• Khok Khlee Bridge, Lopburi Province
• Khon Kaen Elevated Railway, Khon Kaen Province
• Kwae Noi Railway bridge, Phitsanulok Province
• Kui Buri River Railway bridge, Prachuap Khiri Khan Province

L

• Lam Chakkarat Railway bridge, Nakhon Ratchasima Province
• Lam Chi Railway bridge, Surin Province
• Lam Plai Mat Railway bridge, Buriram Province
• Lang Suan River Railway bridge, Chumphon Province
• Lopburi Bypass Elevated Railway, Lopburi Province (Under Construction)

M

• Mae Thiap Bridge, Phitsanulok Province
• Maha Nak Railway bridge, Bangkok
• Huai Muak Lek Bridge, Saraburi Province
• Muak Lek Elevated Railway, Saraburi Province (Under Construction)

N

• Nong Pling Bridge, Nakhon Sawan Province

O

P

• Pak Pan Bridge, Phrae Province
• Pang La Bridge or Ha Ho Bridge, Lampang Province
• Pattani River Railway bridge, Yala Province
• Pa Sak Cholasit Dam Bridges, consist of 5 bridge spans, Saraburi and Lopburi Province
• Pa Sak River Railway bridge, Saraburi Province
• Pa Sak River Railway bridge, Lopburi Province
• Phra Prong Bridge, Prachinburi Province
• Phetchaburi River Railway bridge, Phetchaburi Province
• Phong River Railway bridge, Khon Kaen Province
• Poramin Bridge, or Ban Dara Bridge, Uttaradit Province
• Prachantakham River Bridge, Prachinburi Province
• Pranburi River Railway bridge, Prachuap Khiri Khan Province
• Phra Wiang Bridge, Surat Thani Province

Q

R

• Railway bridges near Bang Krathum railway station, Phitsanulok Province
• Rama VI Bridge, crossing Chao Phraya River, Bangkok, one of the longest truss bridge in Thailand.
• Rama I Canal Bridge, Songkhla Province

• 
  Rama VI Bridge, the most famous railway bridge in Thailand

S

• Saowabha Bridge, crossing Tha Chin River, Nakhon Pathom Province
• Sai Buri River Railway bridge, Yala Province
• Sam Ho Bridge, Lampang Province
• Song Ho Bridge, Lampang Province
• Suvarnabhumi Airport Link viaduct, Bangkok and Samut Prakan Province
• Sri Surat Bridge, Surat Thani Province
• Sri Tapi Bridge, Surat Thani Province

T

• Thai–Lao Friendship Bridge, Nong Khai Province
• Tham Krasae Bridge, Kanchanaburi Province
• Tha Chang Bridge, crossing Mun River, Nakhon Ratchasima Province
• Tha Chom Phu Bridge, or White Bridge, Lamphun Province
• Tha Taphao River Railway bridge, Chumphon Province
• Thepha River Railway bridge, Songkhla Province
• The Bridge on the River Kwai, Kanchanaburi Province

• 
  Thai–Lao Friendship Bridge
• 
  The Bridge on the River Kwai

V

W

• Wang River Railway bridge, Lampang Province
• Watabaek Bridge, crossing Suranarai Road, Chaiyaphum Province

• 
  Watabaek Bridge of northeastern rail route crosses over Suranarai Road in Amphoe Thep Sathit, Chaiyaphum Province

X

Y

• Yothaka Bridge, crossing Nakhon Nayok River, Chachoengsao Province

Z