| Cuddalore Port Junction | |
| Type: | Indian Railways station |
| Style: | Indian Railways |
| Address: | NH 45A, Cuddalore Township, Cuddalore district, Tamil Nadu, Pincode-607003 |
| Coordinates: | 11.7149°N 79.7662°W |
| Elevation: | 4 metre |
| Line: | Chennai Egmore–Thanjavur main line Vriddhachalam–Cuddalore branch line |
| Structure: | At-grade |
| Platform: | 4 |
| Tracks: | 5 |
| Parking: | Yes |
| Electrified: | Yes |
| Owned: | Indian Railways |
| Operator: | Southern Railway zone |
| Status: | Functioning |
| Map Type: | India Tamil Nadu#India |
| Map Dot Label: | Cuddalore Port Junction |
| Map State: | collapsed |
Cuddalore Junction (station code: CUPJ) is an NSG–5 category Indian railway station in Tiruchirappalli railway division of Southern Railway zone.[1] It is a junction station serving the City of Cuddalore. The station is a part of the Trichy division of the Southern Railway zone and its official code is CUPJ. Its old name is Cuddalore Junction and the station code then was COT.
The Junction falls on the Chennai Egmore–Thanjavur main line. Three railway lines diverge from here. One leads to ; another one to and the last one to .
The Junction has four platforms & one stabling line, which is more used for handling freight trains. Parcel movement to/from Cuddalore Port Jn. is quite high. Cuddalore Port Junction also witnesses good amount of originating/terminating freight traffic. The junction also has facilities for handling container cargo.
Cuddalore Port Junction was one of the 9 scheduled halts in Southern Railway for the Science Express (Science Exhibition on Wheels), Phase VI,[2] focusing on Bio-diversity.