Neo-medievalism (or neomedievalism, new medievalism) is a term with a long history that has acquired specific technical senses in two branches of scholarship. In political theory about modern international relations, where the term is originally associated with Hedley Bull, it sees the political order of a globalized world as analogous to high-medieval Europe, where neither states nor the Church, nor other territorial powers, exercised full sovereignty, but instead participated in complex, overlapping and incomplete sovereignties.

In literary theory regarding the use and abuse of texts and tropes from the Middle Ages in postmodernity, the term neomedieval was popularized by the Italian medievalist Umberto Eco in his 1986 essay "Dreaming of the Middle Ages".