Île-de-France tramway Line 6
{{Short description|Suburban tram line in Hauts-de-Seine and Yvelines, southwest of Paris}}
{{Expand French|Ligne 6 du tramway d'Île-de-France|topic=transport|date=January 2019}}
{{Use dmy dates|date=February 2025}}
{{Infobox rail line
| name = Île-de-France tramway Line 6
| color = {{Rail color|Tramways in Île-de-France|6}}
| logo = {{rint|Paris|T|size=50}} {{rint|Paris|T|6|size=50}}
| image = 57,900 T6 Vélizy Translohr n°621 par Cramos.JPG
| caption = Île-de-France tramway Line 6 travelling between Vélizy 2 and Dewoitine stations
| status =
| owner = Île-de-France Mobilités
| start = {{stn|Viroflay-Rive-Droite}}
| end = {{stn|Châtillon–Montrouge}}
| type = Tram
| system = Tramways in Île-de-France
| operator = RATP Group
| stock = 28 Translohr STE6
| ridership2 = 18.8 million (2019){{Cite web|language=fr|url=https://omnil.fr/spip.php?article119|title=Trafic annuel et journalier|date=22 July 2022|access-date=6 April 2023}}
| open = {{Start date|2014|12|13|df=y}}
| lastextension = 28 May 2016
| linelength_km = 14
| electrification = {{750 V DC|conductor=overhead}}
| map = {{switcher
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|{{Île-de-France tramway Line 6}}
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}}
}}
Île-de-France tramway Line 6 (usually called simply T6) is part of the modern tram network of the Île-de-France region of France. Line 6 connects Viroflay-Rive-Droite station and {{stn|Châtillon–Montrouge}} Paris Métro station, south-west of Paris. Line 6 is one of the Île-de-France's two rubber-tyred tramway lines based on the Translohr system. The line has a length of {{convert|14|km|mi|abbr=on}} and 21 stations. It opened to the public on 13 December 2014. The line was extended by {{convert|2.6|km|mi|abbr=on}} (including a tunnel of {{convert|1.6|km|mi|abbr=on}}) and two stations in May 2016.
The line is operated by the RATP Group under contract with Île-de-France Mobilités.