She served twelve consecutive congressional terms from 1973 to 1997 while representing the 7th district of Illinois. Collins in 1979 was elected president of the Congressional Black Congress. She provided leadership in congress as a chair and member of several committees. She became the first African American to serve as Democratic Whip At-Large.
Collins is remembered as a champion for the rights of African Americans, women and the poor. She was born on September 24, 1931 in St. Louis, Missouri.