Osman Zeki Üngör (pronounced [osˈman zeˈci ynˈɟœɾ]; 1880 – 28 February 1958) was a Turkish composer, violin virtuoso and lyricist, who served as the first conductor of the Presidential Symphony Orchestra of Turkey.

Üngör helped establish the State Conservatory of Turkey and served as its first headmaster, involving himself actively in the creation of laws whereby the education of students with special artistic talent would be wholly sponsored by the government.

Üngör wrote symphonic arrangement for the Turkish National Anthem in 1922, composed to the lyrics written by the poet Mehmet Akif Ersoy.

He subsequently became the first conductor of the newly established Presidential Symphony Orchestra of the Republic of Turkey, relocating to Ankara around 1924 in the process.

He was a key figure in the establishment of the Musik-i Muallim Cemiyeti, currently the State Conservatory at Hacettepe University, and served as its headmaster between the years 1924-1934.