He was born 25 January 1899, in Macon County, Alabama, and studied at Alabama State and Talladega College. He preached in the South at various AME Zion churches, from 1916 until undertaking the pastorship of Mount Zion AME Zion Church in Montgomery, Alabama, in 1947. 
His unsuccessful efforts in 1949 on behalf of a black teenage girl who claimed rape by two white police officers marked him as a pioneering Montgomery activist. He was indicted for his participation in the Montgomery bus boycott, and arraigned on February 24, 1956, along with 88 other boycott supporters. 
On March 23, 1960, the "Committee to Defend Martin Luther King and the Struggle for Freedom in the South" published a full page advertisement in the New York Times seeking to defend the Reverend Martin Luther King Jr. and support the Civil Rights Movement. The ad ran in the March 29, 1960 edition of the Times with the title "Heed Their Rising Voices".
He was listed as one of the ad's supporters and was consequently included along with three other black ministers, as the defendants in a libel suit. The claims of the same Montgomery city commissioner who brought that suit also led to the New York Times Co. v. Sullivan case that established the public figure principle in U.S. defamation law.
He died in 1988, and in 1990 his autobiography I Was There by the Grace of God was published.
- "Seay, S. S. (Solomon Snowden), 1899–1988", Civil Rights Digital Library
- "Seay, Solomor[sic] Snowden, Sr. (1899-1988)", King Papers, Martin Luther King, Jr. Research and Education Institute
- "The Origins of the Montgomery Bus Boycott", David J. Garrow, Southern Change, Vol. 7, No. 5, 1985, pp. 21-27
- "Montgomery Bus Boycott: The story of Rosa Parks and the Civil Rights Movement", presented as reproduction of "89 Enter Not Guilty Pleas to Bus Boycott Indictment", The Montgomery Advertiser February 24, 1956
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