Abstract: Provided are antibodies or antigen binding portions thereof that specifically bind Dengue virus, various compositions of such antibodies or antigen binding portions thereof, and methods of their use. The disclosure provides such antibodies, fragments of such antibodies retaining Dengue virus-binding ability, pharmaceutical compositions including such antibodies or antigen binding fragments thereof, and diagnostic compositions including such antibodies or antigen binding fragments thereof. This disclosure further provides for isolated nucleic acids encoding such antibodies, amino acid sequences of such antibodies, and host cells transformed therewith. Additionally, this disclosure provides for prophylactic, therapeutic, and diagnostic methods employing the antibodies and nucleic acids of the disclosure.