Anton Haizinger (also spelled Haitzinger; 14 March 1796 – 31 December 1869) was an Austrian operatic tenor, performing in Vienna and later in Karlsruhe. He was a soloist in the premiere of Beethoven's 9th Symphony.
Haizinger was born in Wilfersdorf in 1796. His father, a teacher, gave him lessons in singing and piano, and he sang in church festivals; his outstanding voice became well-known. However, he trained in Korneuburg to be a teacher, and became a teacher in Vienna. He continued musical studies, studying with Franz Volkert and others. Count Ferdinánd Pálffy, director of Theater an der Wien, heard Haizinger sing in concerts, and offered him an engagement at the theatre; Haizinger gave up teaching.
Haizinger's first roles at Theater an der Wien, in 1821, were in two operas by Rossini, as Gianetto in La gazza ladra and Lindoro in L'italiana in Algeri. He soon became well-known in Vienna. The role of Adolar in Weber's opera Euryanthe, premiered in 1823 at the Theater am Kärntnertor, was created for him, and he was a soloist in the premiere in 1824 of Beethoven's 9th Symphony at the same theatre. He continued studies with Antonio Salieri.
At this time Italian opera was becoming more popular in Vienna than German opera, and he left the city in 1825, appearing in Prague, Bratislava, Frankfurt am Main and elsewhere.
He had an engagement at the Karlsruher Hoftheatre, and his performance impressed the theatre director, Joseph von Auffenberg: in 1826 he offered Haizinger a lifelong engagement at the theatre. Haizinger settled in Karlsruhe. In 1827 he married Amalie Neumann; they had a son, and there were two stepdaughters.