Kaeng Khoi Junction Railway Station is a railway station located in Kaeng Khoi Subdistrict, Kaeng Khoi District, Saraburi Province. It is a class 1 railway station located 125.106 km (77.7 mi) from Bangkok main railway station. It opened in May 1897 as part of the Northeastern Line Ayutthaya-Kaeng Khoi Junction section. In 1956, the station became a junction when a line branched off to Suranarai Station. Then in 1995, another line from Khlong Sip Kao Junction for freight trains only linked to the Northeastern Mainline. Train services are:

Special Express No. 21/22 Bangkok- Ubon Ratchathani- Bangkok
Express No. 67/68 Bangkok- Ubon Ratchathani- Bangkok
Special Express No. 25/26 Bangkok- Nong Khai- Bangkok
Express No. 71/72 Bangkok-Ubon Ratchathani- Bangkok
Express No. 77/78 Bangkok- Nong Khai- Bangkok
Rapid No. 133/134 Bangkok- Nong Khai- Bangkok
Rapid No. 135/136 Bangkok - Ubon Ratchathani- Bangkok
Rapid No. 139/140 Bangkok- Ubon Ratchathani- Bangkok
Rapid No. 141/142 Bangkok- Ubon Ratchathani- Bangkok
Rapid No. 145/146 Bangkok- Ubon Ratchathani- Bangkok
Ordinary No. 233/234 Bangkok- Surin- Bangkok
Commuter No. 339/340 Bangkok- Kaeng Khoi Junction- Bangkok (weekdays only)
Commuter No. 341/342 Bangkok- Kaeng Khoi Junction- Bangkok (weekdays only)
Commuter No. 343/344 Bangkok- Kaeng Khoi Junction- Bangkok (weekends only)
Local No. 431/432 Kaeng Khoi Junction- Khon Kaen- Kaeng Khoi Junction (via Nakhon Ratchasima)
Local No. 433/434 Kaeng Khoi Junction- Bua Yai Junction- Kaeng Khoi Junction (via Lam Narai)
Local No. 437/438 Kaeng Khoi Junction- Lam Narai- Kaeng Khoi Junction
Local No. 439/440 Kaeng Khoi Junction- Bua Yai Junction- Kaeng Khoi Junction (via Lam Narai)