Isolated anti-tissue factor antibodies, immunoglobulins, cleavage products and other specified portions and variants thereof having enhanced ADCC activity, as well as anti-tissue factor antibody compositions, encoding or complementary nucleic acids, vectors, host cells, compositions, formulations, devices, transgenic animals, transgenic plants, and methods of making and using thereof. The antibodies of the invention bind human tissue factor and demonstrate enhanced ADCC activity. Accordingly, the antibodies can be used in a variety of methods for diagnosing, treating, and/or preventing diseases involving tissue factor, where enhanced ADCC activity is desirable such as cancer.