Stefan Petzner (born 17 January 1981 in Lassnitz near Murau, Styria) is an Austrian politician. He was a member of the economical right Alliance for the Future of Austria (Bündnis Zukunft Österreich, BZÖ). Petzner is a former reporter (of the Styrian Kleine Zeitung) and a student of journalism. Petzner directed the election campaigns in 2006 and 2008. In 2008 Petzner was appointed secretary general of the BZÖ.
After Jörg Haider's death in a car accident on 11 October 2008, the party's executive committee nominated Petzner to succeed as party chairman. In an interview on the same day Petzner declared in tears that Jörg Haider was his "Lebensmensch", i.e. the "person of his life".
On 19 October 2008, Petzner announced that he and Haider had been having "a relationship that went far beyond friendship" with the full knowledge of Haider's wife, Claudia. The Associated Press reported Petzner's comments as "Jörg and I were connected by something truly special. He was the man of my life ... I loved him as a best friend." The article was titled: Was Austrian far-right leader Joerg Haider gay? Euronews ran the headline "Rumours of Joerg Haider’s secret gay life." Other reports had that “some say” Haider had died “after a furious row with the man who now claims to have been his lover.”
Petzner's statements were criticized within the party as misleading and fit to be interpreted as insinuating a homosexual relationship between Haider and Petzner. His party's officials made a rushed attempt to limit the damage for the image of their far-Right group and banned several other interviews that were to have occurred that week.
From 12 October to 19 November 2008 he served as acting party chairman and was succeeded by Herbert Scheibner. Petzner concentrated on directing the party's election campaign in the federal state Carinthia where, in March 2009, the party won a near-landslide victory taking over 45% of the vote.
As the party's designated leader, Petzner was also expected to be elected Klubobmann, i.e. chairman of the party's parliamentary group, but on 22 October 2008, Josef Bucher was elected instead, with Petzner becoming one of the five vice chairmen. Petzner himself was reported to have suggested Bucher, who was elected unanimously. Bucher's election was widely interpreted as the result of the rising criticism of Petzner's earlier statements.
When on 30 January 2010, after the secession of the majority of party officials and members from the Carinthian party, Bucher was elected Chairman of the newly formed Carinthian BZÖ, Petzner was unanimously elected Acting Chairman (the position Jörg Haider had held from 2005 till his death) and Vice-Chairman.
On 8 April 2010 Petzner announced his resignation as Secretary General of the nationwide BZÖ. His simultaneous position as Acting Chairman of the Carinthian BZÖ, where after the break-away of the Freedom Party in Carinthia (FPK) a great deal of work was to be done, would require his full concentration. Only a week earlier he had disclaimed any such rumours as "attempts from a third party to disturb the Easter peace."
In March Petzner stepped down from the position as Acting Chairman (succeeded by Sigisbert Dolinschek).
He was Vice-Chairmen of Josef Bucher in the new formed Carinthian BZÖ state party till expulsion.
On 1st of October 2013 he got expelled for "party damaging behaviour" from the BZÖ after demanding Josef Buchers step down and criticizing the campaign after losing mayor voting shares at the Austrian legislative election 2013 to the Freedom Party.  
- 14 August. 2011
- Kleine Zeitung.at, 12 Aug. 2008 Strutz und Petzner: Ihre Karriere
- Haider 'was double speed limit'; BBC News, 12 Oct. 2008
- "Petzner admits speeding", Austrian Independent. March 28, 2011. Accessed April 17, 2011
- Jorg Haider successor tells of their 'relationship'; The Daily Telegraph 22 Oct. 2008
- article by William J. Kole, Associated Press, – Fri Oct 24, 7:31 am
- Euronews, 23 Oct. 2008
- The Daily Telegraph 22 Oct. 2008
- ots.at press release, 30 Jan. 2010: Petzner einstimmig zum geschäftsführenden Obmann gewählt.
- Die Presse.com, 8 April 2010
- Kleine Zeitung.at, 25. March 2011
- Petzner on the website of the Carinthian BZÖ, 31 March 2012
-  BZÖ-Fiasko: Petzner rechnet mit Bucher ab, 30 September 2013
-  BZÖ schmeißt Stefan Petzner raus, 1 October 2013
|Party political offices|
|BZÖ Party Chairman (acting)
Herbert Scheibner (acting)