She was instrumental in organizing Mississippi Freedom Summer for the Student Nonviolent Coordinating Committee (SNCC), and later became the Vice-Chair of the Mississippi Freedom Democratic Party, attending the 1964 Democratic National Convention in Atlantic City, New Jersey, in that capacity. Her plain-spoken manner and fervent belief in the Biblical righteousness of her cause gained her a reputation as an electrifying speaker and constant champion of civil rights.
She married Perry "Pap" Hamer in 1942 and adopted two children Dorothy Jean and Virgie Ree. Hamer went to work on the plantation where her husband drove a tractor, first as a field worker and then as the plantation's timekeeper - a job she was given after the plantation owners discovered she was literate.
On August 23, 1962, Rev. James Bevel, an organizer for the Student Nonviolent Coordinating Committee (SNCC) and an associate of Rev. Dr. Martin Luther King, Jr., gave a sermon in Ruleville, Mississippi and followed it with an appeal to those assembled to register to vote. Black people who registered to vote in the South faced serious hardships at that time due to institutionalized racism, including harassment, the loss of their jobs, physical beatings, and lynchings; nonetheless, Hamer was the first volunteer. She later said, "I guess if I'd had any sense, I'd have been scared - but what was the point of being scared? The only thing they [white people] could do was kill me, and it seemed they'd been trying to do that a little at a time since I could remember."
On August 31, she traveled on a rented bus with other attendees of Rev. Bevel's sermon to Indianola, Mississippi to register. In what would become a signature trait of Hamer's activist career, she began singing Christian hymns, such as "Go Tell It on the Mountain" and "This Little Light of Mine," to the group in order to bolster their resolve. The hymns also reflected Hamer's belief that the civil rights struggle was a deeply spiritual one. By the next day, she had been harassed by police, fired from her job, lost her dog, and received a death threat from the Ku Klux Klan.
Hamer's courage and leadership in Indianola came to the attention of SNCC organizer Bob Moses, who dispatched Charles McLaurin from the organization with instructions to find "the lady who sings the hymns". McLaurin found and recruited Hamer, and though she remained based in Mississippi, she began traveling around the South doing activist work for the organization.
On June 9, 1963, Hamer was on her way back from Charleston, South Carolina with other activists from a literacy workshop. Stopping in Winona, Mississippi, the group was arrested on a false charge and jailed by white policemen. Once in jail, Hamer and her colleagues were beaten savagely by the police, almost to the point of death.
Released on June 12, she needed more than a month to recover. Though the incident had profound physical and psychological effects, Hamer returned to Mississippi to organize voter registration drives, including the "Freedom Ballot Campaign", a mock election, in 1963, and the "Freedom Summer" initiative in 1964. She was known to the volunteers of Freedom Summer - most of whom were young, white, and from northern states - as a motherly figure who believed that the civil rights effort should be multi-racial in nature.''
The Freedom Democrats' efforts drew national attention to the plight of African-Americans in Mississippi, and represented a challenge to President Lyndon B. Johnson, who was seeking the Democratic Party's nomination for reelection; their success would mean that other Southern delegations, who were already leaning toward Republican challenger Barry Goldwater, would publicly break from the convention's decision to nominate Johnson — meaning in turn that he would almost certainly lose those states' electoral votes in the election. Hamer, singing her signature hymns, drew a great deal of attention from the media, enraging Johnson, who referred to her in speaking to his advisors as "that illiterate woman".
Hamer was invited, along with the rest of the MFDP officers, to address the Convention's Credentials Committee. She recounted the problems she had encountered in registration, and the ordeal of the jail in Winona, and, near tears, concluded:
In Washington, D.C., President Johnson called an emergency press conference in an effort to divert press coverage away from Hamer's testimony; but many television networks ran the speech unedited on their late news programs. The Credentials Committee received thousands of calls and letters in support of the Freedom Democrats.
Johnson then dispatched several trusted Democratic Party operatives to attempt to negotiate with the Freedom Democrats, including Senator Hubert Humphrey (who was campaigning for the Vice-Presidential nomination), Walter Mondale, Walter Reuther, and J. Edgar Hoover. They suggested a compromise which would give the MFDP two seats in exchange for other concessions, and secured the endorsement of Martin Luther King, Jr. and the Southern Christian Leadership Conference for the plan. But when Humphrey outlined the compromise, saying that his position on the ticket was at stake, Hamer, invoking her Christian beliefs, sharply rebuked him:
Future negotiations were conducted without Hamer, and the compromise was modified such that the Convention would select the two delegates to be seated, for fear the MFDP would appoint Hamer. In the end, the MFDP rejected the compromise, but had changed the debate to the point that the Democratic Party adopted a clause which demanded equality of representation from their states' delegations in 1968.
Hamer died of breast cancer on March 14, 1977, at the age of 59 at a hospital in Mound Bayou, Mississippi and is buried in her hometown of Ruleville, Mississippi. Her tombstone reads, "I am sick and tired of being sick and tired".
"I am sick and tired of being sick and tired." (This quote was later employed as her epitaph.)
"Nobody's free until everybody's free"
"I have a dream"
Fannie Lou Hamer is the topic of the Gil Scott-Heron song 95 South.