There is disclosed compositions and methods relating to anti-VEGFR2 antibodies. More specifically, there is disclosed fully human antibodies that bind VEGFR2, VEGFR2-binding fragments and derivatives of such antibodies, and VEGFR2-binding polypeptides comprising such fragments. Further still, there is disclosed antibody fragments and derivatives and polypeptides, and methods of using such antibodies, antibody fragments and derivatives and polypeptides, including methods of treating or diagnosing subjects having various cancers.