Amelia "Mimi" Himes Walker (July 24, 1880 - July 19, 1974) was an American suffragist and women's rights activist. Walker was one of the Silent Sentinels who picketed outside of the White House for women's right to vote. She was arrested in 1917 and sentenced to 60 days in the workhouse. After women secured the right to vote, Walker continued to honor the efforts of the suffragists. She also promoted the Equal Rights Amendment (ERA).