Petro Karyshkovsky-Ikar (Ukrainian: Петро Йосипович Каришковський; March 12, 1921, Odesa – March 6, 1988, Odesa) was a Ukrainian Soviet historian, numismatist, a scholar and lexicographer.

Doctor of Historical Sciences, professor, since 1963 and until his last days he headed the department of ancient history and medieval Odesa University.

In 1951 Petro completed his master's thesis (Political relations between the Byzantine Empire, Bulgaria and Kyivan Rus' in the years 967–971) and at the same time began to publish articles in journals Questions of History, Byzantine chronicle, Journal of Ancient History on Rus'ian-Byzantine relations in the 10th century.

Continuing to work at the Odesa University, Karyshkovskij-Ikar read various courses of lectures, often on the history of Ancient Greece and Rome.

The depth of research of Petro was to a large extent because he had a perfect command of many languages: English, German, Italian, Romanian, Polish, Czech, Bulgarian, Serbian, Latin and ancient Greek.