TOP 09 (Czech: Tradice Odpovědnost Prosperita, lit. 'Tradition Responsibility Prosperity') is a liberal-conservative political party in the Czech Republic, led by Matěj Ondřej Havel. 9 of its members sit in the Chamber of Deputies, and two of them are MEPs.

The party was founded on 11 June 2009 by Miroslav Kalousek who left the Christian and Democratic Union – Czechoslovak People's Party. Its first leader was Karel Schwarzenberg, who had previously served as Minister of Foreign Affairs in the second Topolánek cabinet from January 2007 to March 2009, having been nominated by the Green Party for the post, and who had been elected to the Senate in 2004 as nominee of the Freedom Union – Democratic Union (US-DEU) and Civic Democratic Alliance (ODA) parties.

In the 2010 parliamentary elections on 28–29 May 2010, TOP 09 received 16.7% of the vote and 41 seats, becoming the third largest party. The party joined the Nečas cabinet, forming a coalition with the Civic Democratic Party (ODS) and Public Affairs (VV).

In September 2010 TOP 09 applied to join the European People's Party. Karel Schwarzenberg had already officially participated in two EPP summits (15 September and 16 December 2010). On 10 February 2011 TOP 09 was granted permission to join the EPP.

In the 2013 parliamentary election on 25–26 October 2013, TOP 09 won 12% of the vote and 26 seats. The party became part of the parliamentary opposition to the Sobotka cabinet.

In the 2014 European elections on 24 and 25 May 2014, TOP 09 reached second place nationally with 15.95% of the vote, electing 4 MEPs.

Karel Schwarzenberg left the position of leader in 2015. He was replaced by Miroslav Kalousek afterwards.

In March 2016, Karel Tureček left the party and joined ANO, which left TOP 09 with 25 MPs. In May 2016, Pavol Lukša, one of founders of TOP 09, left the party and established a new party, Good Choice.