Frankfurt (Main) Hauptwache station (German:Bahnhof Frankfurt (Main) Hauptwache) is a major train station situated at theHauptwache square in the centre ofFrankfurt, Germany.
As of 2022[update], with 93,000 passengers per day,[3] Hauptwache station is the third-busiestrapid transit station in Frankfurt afterFrankfurt Central Station andKonstablerwache station and a major hub forcommuter transport in theFrankfurt/Rhine-Main region. It is served by eightS-Bahn lines (S1–S6, S8, S9) and sixU-Bahn lines (U1–U3, U6–U8) on 2 levels.
The station is situated under theHauptwache square at the western end of theZeil, Frankfurt's main shopping street.Konstablerwache station is located at the eastern end of the Zeil.

In 1961 the Frankfurt city council agreed to build a U-Bahn network. Construction began in 1963 on a line between theNordweststadt (a new housing estate in the north-western suburbs) and the city centre. The first section (part of theA Line) opened on 4 October 1968 from Nordweststadt to Hauptwache,[5] which was the terminus of the tunnelled section until 1973, when it was extended south to Theaterplatz, nowWilly-Brandt-Platz.[6] This route is now used by trains on lines U1–U3 and U8.
TheS-Bahn reached Hauptwache on 28 May 1978, when the first section of theCity Tunnel from thecentral station to was opened.[7] Hauptwache was the terminus of the S-Bahn until 1983, when the City Tunnel was extended toKonstablerwache, at the other end of theZeil.
The east-westU-Bahn C Line (services U6 and U7) began running through Hauptwache in 1986,[8] using platforms which had already been built at the same time as those for the S-Bahn.[7]
In 1986 thetram line servingHauptwache was closed.[9]
The station has three underground levels.[10] Immediately below the street is a distribution level with a shopping arcade. Below this are the platforms for theS-Bahn and theU-Bahn C Line (U6 and U7). This level has four tracks. The S-Bahn runs on the inner two tracks with anisland platform and the U-Bahn uses the outer two tracks with twoside platforms. TheU-Bahn A Line (U1–U3 and U8) runs through the deepest level of the station on two tracks with side platforms.