Ivo Lapenna (5 November 1909 – 15 December 1987) was a Dalmatian Italian law professor.

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Lapenna was born in Split in 1909. He was a noted Esperanto speaker and served as the President of the World Esperanto Association between 1964 and 1974. Lapenna was highly regarded as an orator in Esperanto, authored a number of books, and was the driving force behind the 1954 Montevideo Resolution in which UNESCO recognized Esperanto. He died in Copenhagen in 1987.

• State and Law: Soviet and Yugoslav Theory. University of London and Athlone Press. 1964.

• President of the Universal Esperanto Association