Alexander Dmitriyevich Dolgov is a Russian physicist and a professor at Novosibirsk State University and the University of Ferrara who is known for his contribution in cosmology and astroparticle physics.

Alexander Michael Dolgun was an American survivor of the Soviet Gulag who wrote about his experiences in 1975 after being allowed to leave the Soviet Union.

Alexander Alexandrovich Dolsky is a Soviet and Russian poet, writer, artist, and most famously known for being a bard.

Alexander Petrovich Dovzhenko, also transliterated Oleksandr Petrovych Dovzhenko, was a Ukrainian Soviet screenwriter, film producer and director. He is often cited as one of the most important early Soviet filmmakers, alongside Sergei Eisenstein, Dziga Vertov, and Vsevolod Pudovkin, as well as being a pioneer of Soviet montage theory.

Alexander Vasilyevich Druzhinin, , was a Russian writer, translator, and magazine editor.

Alexander Dmitrievich Dudoladov was a Soviet and Russian writer, screenwriter and film director.

Alexander Vasilyevich Dukhnovych was an Transcarpathian Rusyn priest, poet, writer, pedagogue, and social activist of the Russophile orientation. He is considered as the awakener of the Rusyns.

Alexander Leonidovich Dvorkin is a Russian anti-cult activist. From 1999 to 2012 he was professor and head of the department of the study of new religious movements (cults) at Saint Tikhon's Orthodox University. He is currently professor of department of missiology at that university.

Alexander Dyakonov is a Russian mathematician, Professor, Dr.Sc., a professor at the Faculty of Computer Science at the Moscow State University. Professor of the Russian Academy of Sciences. Multiple winner of international competitions in applied data analysis.

Alexander Dyce was a Scottish dramatic editor and literary historian.