The Frauenfeld–Wil railway is a 1,000 mm (3 ft 3+3⁄8 in) metre gauge railway line^[2] in Switzerland, which connects the town of Frauenfeld in the canton of Thurgau, to the town of Wil in the canton of St. Gallen, following the valley of the Murg river. The Frauenfeld-Wil-Bahn (FWB) opened the line in 1887 and operated it until 2021, when that company merged into Appenzell Railways.^[3] The line is included in Tarifverbund Ostwind, and operates as service S15 of the St. Gallen S-Bahn.

You can help expand this article with text translated from the corresponding article in German. (November 2023) Click [show] for important translation instructions. Machine translation, like DeepL or Google Translate, is a useful starting point for translations, but translators must revise errors as necessary and confirm that the translation is accurate, rather than simply copy-pasting machine-translated text into the English Wikipedia. Do not translate text that appears unreliable or low-quality. If possible, verify the text with references provided in the foreign-language article. You must provide copyright attribution in the edit summary accompanying your translation by providing an interlanguage link to the source of your translation. A model attribution edit summary is Content in this edit is translated from the existing German Wikipedia article at [[:de:Frauenfeld-Wil-Bahn]]; see its history for attribution. You may also add the template {{Translated|de|Frauenfeld-Wil-Bahn}} to the talk page. For more guidance, see Wikipedia:Translation.

Quick Facts Overview, Owner ...

Frauenfeld–Wil railway (S15)
An old Frauenfeld–Wil train in Münchwilen
Overview
Owner	Appenzell Railways
Locale	Switzerland
Termini	Frauenfeld Wil
Service
Type	Light rail
Services	1
History
Opened	1887 electrification 1921
Technical
Line length	17.44 km (10.84 mi)
Character	841
Track gauge	1,000 mm (3 ft 3+3⁄8 in) metre gauge
Electrification	1,200 V DC overhead line
Highest elevation	570.8 m (1,873 ft)
Maximum incline	46 ‰ or 4.6 %
Route diagram Legend km elev SBB line from St. Gallen SBB line from Wattwil 0.00 Wil SG ↓S15 571 m depot and workshop; Rollbock yard Thurbo line to Weinfelden SBB to line to Winterthur 2.35 Schweizerhof 531 m 3.89 Münchwilen TG 516 m 4.66 Münchwilen Pflegeheim 509 m 6.50 Rosental 487 m 7.95 Wängi GB 474 m 8.27 Wängi 470 m 9.01 Wiesengrund 465 m 9.81 Jakobstal 460 m 11.49 Matzingen 447 m 12.62 Weberei Matzingen 440 m 13.92 Murkart (until 2013) 431 m 15.13 Lüdem 423 m 16.85 Frauenfeld Marktplatz 417 m SBB line from Winterthur 17.45 Frauenfeldy ↑S15 405 m SBB line to Weinfelden Source: Swiss railway atlas[1] This diagram: view talk edit

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Plans to build an interurban tramway between Frauenfeld and Wil were first made in the early 1850s. The rail line opened in 1887, and was electrified in 1921. Around 1.25 million passengers use the line every year.

Locals call the train "Wilerbähnli" or "Wiler Bähnli".^[4]

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Quick Facts S15, Overview ...

S15
FW ABe 4-8 near Frauenfeld Marktplatz
Overview
Service type	St. Gallen S-Bahn service
Current operator(s)	Appenzell Railways (AB)
Former operator(s)	Frauenfeld-Wil Bahn (FWB)
Route
Termini	Frauenfeld Wil SG
Stops	10
Service frequency	Every 30 minutes
Technical
Rolling stock	Class ABe 4-8 EMUs

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Trains run every 30 minutes as S15 service of St. Gallen S-Bahn, requiring 3 trains in operation at once, with trains crossing at the stations of Matzingen and Schweizerhof.

In 2011 the railway company ordered five new ABe4/8 low floor trains from Stadler Rail, to replace the old trains. However, there are plans for a 15 minutes interval in future and therefore some of the old trains will be retained. The first train was delivered in March 2013 and was tested for 3 months. It went into regular service on 26 June 2013.^[5][6][7] FWB closed the station at Murkart in 2018 in order to maintain connections with long-distance trains at Frauenfeld.^[8]

S15 Frauenfeld – Wängi – Wil SG

• Frauenfeld
• Frauenfeld Marktplatz
• Lüdem (stops only on request)
• Weberei Matzingen (stops only on request)
• Matzingen
• Jakobstal (stops only on request)
• Wiesengrund (stops only on request)
• Wängi
• Rosental (stops only on request)
• Münchwilen Pflegeheim (stops only on request)
• Münchwilen TG
• Wil SG

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Freight trains ran on the line from 1907 until the early 2000s. This included transporter wagons from 1977 onwards.^[10]