Kenneth Patrick O'Donnell (March 4, 1924 – September 9, 1977) was an American political consultant. He was the special assistant and appointments secretary to President John F. Kennedy from 1961 until Kennedy's assassination in November 1963. O'Donnell was a close friend of President Kennedy and his younger brother Robert F. Kennedy.
|White House Appointments Secretary|
January 20, 1961 – November 22, 1963
|President||John F. Kennedy|
|Preceded by||Thomas Stephens|
Wilton Persons (Chief of Staff)
|Succeeded by||W. Marvin Watson|
Kenneth Patrick O'Donnell
March 4, 1924
Worcester, Massachusetts, U.S.
|Died||September 9, 1977 (aged 53)|
Boston, Massachusetts, U.S.
|Resting place||Holyhood Cemetery|
|Spouse(s)||Helen Sullivan (1947–1977)|
Asta Steinfatt (1977)
|Relations||Alice Guerin and Cleo Albert O'Donnell (parents)|
|Children||3 sons, 2 daughters|
|Education||Harvard University (BA)|
Boston College (LLB)
|Branch/service||U.S. Army Air Forces|
|Years of service||1942–1945|
|Battles/wars||World War II|
- "Kenneth Patrick O'Donnell." Dictionary of American Biography, Supplement 10: 1976–1980. Charles Scribner's Sons. 1995.