Nickelsdorf (Hungarian: Miklóshalma or Miklóshalom, Croatian: Mikištrof) is a town in the district of Neusiedl am See in the Austrian state of Burgenland.

It has an important border crossing to Hegyeshalom (German: Straß-Sommerein) in Hungary.

The town belonged—like the whole province of Burgenland—to Hungary until 1920, when it became part of the Austrian state of Burgenland.

Since 1985, the annual and internationally famous Jazzfestival Konfrontationen has taken place in Nickelsdorf.

With famous bands like Iron Maiden, Metallica and Guns N' Roses, it was the largest ever rock festival in Austria.