S7 (Berlin)

{{Use dmy dates|date=January 2020}}

{{Infobox rail line

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| name = {{rail-interchange|berlin|S7|size=30}}

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| system = Berlin S-Bahn

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| locale = Berlin

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| operator = S-Bahn Berlin GmbH

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| stock = DBAG Class 481

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| electrification = 750 V DC Third rail

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| map = {{S7 (Berlin S-Bahn)}}

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S7 is a line on the Berlin S-Bahn.{{Cite web| title = S-Bahn Network Map | publisher = S-Bahn Berlin GmbH | date = 27 June 2008 | url = http://www.s-bahn-berlin.de/pdf/s_bahn_netz.pdf | accessdate = 7 July 2009}} It operates from Ahrensfelde to Potsdam over:

• the Wriezen Railway, completed on 1 May 1898 and electrified to Marzahn in 1976, to Mehrower Allee in 1980 and to Ahrensfelde in 1982,
• a section of the Outer ring, completed in the early 1940s as part of the Outer freight ring and electrified in 1976,
• a section of the Prussian Eastern line, opened on 1 October 1866 and electrified on 6 November 1928,
• the Stadtbahn, opened on 7 February 1882 and electrified on 11 June 1928,
• a section of the Berlin-Blankenheim line, opened west of Grunewald in 1879 and further east in 1882 and electrified in 1928 and
• a section of the Berlin-Potsdam-Magdeburg line, opened in 1838 and electrified in 1928.