Dorothea Margaret Nutzhorn was born on May 26, 1895, at 1041 Bloomfield Street, Hoboken, New Jersey to second-generation German immigrants Heinrich Nutzhorn and Johanna Lange. She had a younger brother, Martin. She dropped her middle name and assumed her mother's maiden name after her father abandoned the family when she was 12 years old, one of two traumatic incidents early in her life. The other was her contraction of polio at age seven, which left her with a weakened right leg and a permanent limp. "It formed me, guided me, instructed me, helped me and humiliated me," Lange once said of her altered gait. "I've never gotten over it, and I am aware of the force and power of it."