| Fredericia–Padborg railway line | |
| Native Name: | Fredericia-Padborg-banen |
| Native Name Lang: | da |
| Type: | Heavy rail |
| System: | Danish railway |
| Status: | Operational |
| Stations: | 9 |
| Open: | (–) (–) (–) |
| Owner: | Banedanmark |
| Operator: | Danish State Railways |
| Character: | Passenger trains Freight trains |
| Linelength Km: | 110.6 |
| Linelength Mi: | 68.7 |
| Tracks: | Double track (–) Single track (–) |
| Linenumber: | 26 |
| Electrification: | |
| Speed: | 160 km/h (–) 180 km/h (–) 120 km/h (–) |
| Map Name: | The Fredericia–Padborg railway line |
| Map State: | uncollapsed |
The Fredericia–Padborg railway line (Danish: Fredericia-Padborg-banen) is a 110.6km (68.7miles) long railway line in Denmark which runs through the historical region of Southern Jutland between the city of Fredericia and the German border at Padborg. Being one of the main arteries of the Danish railway network, the standard gauge and fully electrified railway line is double track except for the section between and which is single track.
The railway line constitutes the southernmost part of the East Jutland longitudinal railway line (Danish: Den Østjyske Længdebane), the through route along the east coast of the Jutland Peninsula from the port city of Frederikshavn in North Jutland to the German border at Padborg, where it connects to the Flensburg–Padborg railway line and the German railway network.