Karl Eugen Petzold (* November 7, 1813 in Ronneburg (Thuringia); † January 28, 1889 in Basel, citizen of Zofingen) was a German-Swiss singing teacher, organist, pianist and composer. Beginning in 1828 and encouraged as a child by his father in the form of musical instruction by the local cantor, Petzold studied at the Thomasschule in Leipzig under Christian Theodor Weinlig. Under the guidance of Felix Mendelssohn Bartholdy and Ferdinand David, he trained as a versatile musician. At the university there, he directed the Philharmonic Society for Singing and Instrumental Music, which he had founded. In the winter of 1838/1839, he served as Kapellmeister at the Bautzen City Theater. In 1840, through Robert Schuhmann's recommendation, Petzold accepted a position as a singing and music teacher at the private educational institution founded by Johann Karl Christian Lippe at Lenzburg Castle (Switzerland). From 1842 Petzold worked as music director, singing teacher and organist at the town school in Murten (ibid.). In the Swiss town of Zofingen (where he was also granted citizenship in 1851) he worked as an organist from 1844 and regularly gave large winter concerts. He retired completely in 1887.

Many piano and orchestral works composed by Petzold were published, but are forgotten today.