Höchst (German pronunciation: [ˈhøːçst]) is a neighbourhood and market town in the Ortsbezirk of Frankfurt-West in Frankfurt am Main, Germany. Höchst is situated 10 kilometres (6.2 mi) west of Frankfurt city centre, on the north bank of the Main at the confluence with the River Nidda. Its old town is famous for around 400 timber framed houses.

At the 1st of July in 1917, Sindlingen, Unterliederbach and Zeilsheim were incorprated to Höchst am Main. In 1928 Höchst became incorporated into Frankfurt am Main, along with Sindlingen, Unterliederbach and Zeilsheim. The well-preserved old city with its 400 half-timbered houses has been under the Denkmalschutz protection law since 1972. An important cultural event is the folklore festival, the Höchster Schloßfest, that brings many visitors to Höchst. It begins in the middle of June and last four weeks. It includes a festival in the old city, fireworks, and a jazz festival in the castle.

Höchst was first recorded as Hostat (meaning high site or high place). On 11 February 1355, Höchst received its town privileges by emperor Charles IV. In a charter dated 12 January 1356, Charles IV gave additional privileges to Höchst including the right to hold markets every Tuesday.

On 22 June 1622, during the Thirty Years' War, the Battle of Höchst saw a Catholic League and Spanish Empire armies defeat a Protestant force. A second Battle of Höchst occurred on 11 October 1795 when Habsburg soldiers clashed with Republican French troops.

In 1586, the first major fire in Höchst occurred. The fire destroyed 56 houses, 25 barns, the town hall, the bath house and the Mainz Gate, which was half the town at the time.

Höchst am Main became part of Frankfurt am Main in 1928. Until 1987, Höchst was the administrative seat of an independent Landkreis. Höchst is now the center of the Frankfurt-West Ortsbezirk (administrative district) with 135,000 residents.

The name Höchst became known throughout the world for the chemical and pharmaceutical corporation Hoechst AG which was established in 1863. The Hoechst AG was headquartered in Höchst until in 1999, when the company was merged with the French Rhône-Poulenc S.A. and became Aventis which, after another merger, became Sanofi-Aventis. Major research and production activities of the company continue to be conducted in Höchst. The site of the Hoechst works is now operated as the Höchst Industrial Park (Industriepark Höchst). It includes a notable expressionist building designed by Peter Behrens, the Technical Administration Building (Technische Verwaltungsgebäude).

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  timber framed houses of the old town
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  Main river bank in Höchst, called "Batterie"
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  Bolongarostraße in Höchst
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  October 2008: Market in Höchst
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  Porcelain manufacturer in the Dalberghouse
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  Höchster Schloss
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  Saint Justin's Church, Frankfurt-Höchst
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  Bolongaropalast

• Joseph Aschbach (1801-1882), historian well known for his studies on the Visigoths.
• Tristan Brübach (1984–1998), murder victim.
• Carl Chun (1852–1914), German marine biologist, born in Höchst.
• Hans Fischer (1881–1945), recipient of 1930 Nobel Prize for Chemistry.

• Wilhelm Frischholz: Alt-Höchst. Ein Heimatbuch in Wort und Bild. Frankfurt am Main 1926: Hauser.
• Markus Grossbach: Frankfurt-Höchst. Geschichte 1860–1960. Bildband. Erfurt 2001: Sutton.
• Wilhelm Grossbach: Alt Höchst auf den zweiten Blick. Impressionen aus einer alten Stadt. Frankfurt-Höchst 1980: Höchster Verlagsgesellschaft.
• Wilhelm Grossbach: Höchst am Main. Gestern, heute, morgen. Frankfurt am Main 2006: Frankfurter Sparkasse.
• Michael König: Die Krise großstädtischer Subzentren. Bedeutungsverlust gewachsener Nebenzentren mit eigener städtischer Tradition. Gründe, Situation und mögliche Auswege am Beispiel von Frankfurt-Höchst. (= ISR Graue Reihe; Bd. 3). Institut für Stadt- und Regionalplanung Berlin 2007: TU Berlin, ISBN 978-3-7983-2042-0 (online)
• Franz Lerner: Frankfurt am Main und seine Wirtschaft: Wiederaufbau seit 1945. Frankfurt am Main 1958: Ammelburg.
• Wolfgang Metternich: Die städtebauliche Entwicklung von Höchst am Main. Frankfurt-Höchst 1990: Stadt Frankfurt und Verein für Geschichte und Altertumskunde.
• Günter Moos: Rundgang durch das alte Frankfurt-Höchst. Gudensberg-Gleichen 2001: Wartberg.
• Rudolf Schäfer: Höchst am Main. Frankfurt am Main 1981: Frankfurter Sparkasse von 1822.
• Rudolf Schäfer: Chronik von Höchst am Main. Frankfurt am Main 1986: Waldemar Kramer.

• Official web site Frankfurt Höchst (German)
• Private web site Frankfurt Höchst (German)
• Höchst on internet project 'Alt Frankfurt' (English/German) Archived 12 October 2008 at the Wayback Machine
• 360° views from Höchst