Ülkü (literally: "ideal") is a Turkish surname and a unisex given name. People with the name include:

Given name Ülkü Adatepe (1932–2012), youngest adopted daughter of Mustafa Kemal Atatürk Ülkü Azrak (1933–2020), Turkish lawyer Ülkü Tamer (1937-2018), Turkish poet Ülkü Uludoğan (born 1940), Turkish artist

Surname Mehmet Ülkü (1877–1946), Turkish businessman and politician Semra Ülkü, Turkish educator

See also Ülkü (magazine)

References