Conradin Kreutzer (22 November 1780 – 14 December 1849) was a German composer and conductor, known for his contribution to opera and choral music. Born in Meßkirch, Baden, Kreutzer initially pursued studies in law at the University of Freiburg but shifted his focus to music around 1804 when he moved to Vienna. There, he interacted with prominent composers such as Ludwig van Beethoven and Joseph Haydn, and possibly studied under Johann Georg Albrechtsberger.

Kreutzer's career included a stint as Hofkapellmeister in Stuttgart from 1811 to 1812, and later as Kapellmeister to the king of Württemberg until 1816. He achieved success with operas staged in Vienna's major theaters, including the Theater am Kärntnertor, Theater in der Josefstadt, and Theater an der Wien, although many of these works have since faded from the repertoire.

In 1840, Kreutzer became the conductor of the opera in Cologne. His daughters, Cecilia and Marie Kreutzer, were noted sopranos. Kreutzer's most enduring work is the opera "Das Nachtlager in Granada" (1834), which remained popular for decades. He was also known for his part-songs for men's voices and chamber music, including the Septet for wind and strings, Op. 62.

Kreutzer was one of 50 composers who contributed a variation to Anton Diabelli's "Vaterländischer Künstlerverein." He passed away in Riga, having spent the last period of his life there. His legacy includes a diverse body of work spanning operas, chamber music, orchestral pieces, and choral compositions.