In 1939, Brooks married Henry Lowington Blakely, Jr., whom she met after joining Chicago's NAACP Youth Council.[6] They had two children: Henry Lowington Blakely III, and Nora Brooks Blakely.[2] Brooks' husband died in 1996.[26]
From mid-1961 to late 1964, Henry III served in the U.S. Marine Corps, first at Marine Corps Recruit Depot San Diego and then at Marine Corps Air Station Kaneohe Bay. During this time, Brooks mentored her son's fiancée, Kathleen Hardiman, in writing poetry. Upon his return, Blakely and Hardiman married in 1965.[15] Brooks had so enjoyed the mentoring relationship that she began to engage more frequently in that role with the new generation of young black poets.[15]
Gwendolyn Brooks died at her Chicago home on December 3, 2000, aged 83.[2] She is buried in Lincoln Cemetery.[27]