Serhii Fedorovych Dezhnyuk[a] (born January 5, 1976) is a Ukrainian-American theologian, historian, and political analyst.

Since 2005, Dezhnyuk serves as a vice-president of Independent American Center of Political Monitoring.

[1] Dezhnyuk specializes in historical theology with a concentration on the Council of Florence and analysis of the Union it produced.

[2] As a former Ukrainian politician, he also writes on the topics that intersect religion and public life.

Born in Rokytne, Rivne Oblast, Ukraine, Dezhnyuk currently resides in Tulsa, OK, USA.