| Sintra Line | |
| Native Name: | Linha de Sintra |
| Native Name Lang: | pt |
| Type: | Heavy rail |
| Status: | Operational |
| Locale: | Lisbon, Amadora and Sintra, Portugal |
| Start: | Rossio |
| End: | Sintra |
| Connectinglines: | Cintura Line, Oeste Line |
| Stations: | 15 |
| Linelength: | 27.2km (16.9miles) |
| Tracks: | Double-track (From Rossio to Campolide, from Agualva-Cacém to Sintra) and Quadruple-track (From Campolide to Agualva-Cacém) |
| Electrification: | 25 kV / 50 Hz Overhead line |
Linha de Sintra is a railway line that connects the stations of Rossio and Sintra, Portugal. and is operated by Comboios de Portugal.
The railway, one of the first to be planned in Portugal, was opened on 2 April 1887.[1] [2] The southern terminus was changed from to, after the station was inaugurated in June 1891. The duplication works were completed on 20 January 1949, and during the 1950s, the line was electrified.[3] New rolling stock was introduced in the 1990s.[4] Quadruple-tracking between and had been completed by September 1999.[5]