Seán Lemass

**Seán Francis Lemass** (born **John Francis Lemass**; 15 July 1899 – 11 May 1971) was an Irish Fianna Fáil politician. He was Taoiseach and Leader of Fianna Fáil from 1959 to 1966. He was Tánaiste from 1957 to 1959, 1951 to 1954 and 1945 to 1948, Minister for Industry and Commerce from 1957 to 1959, 1951 to 1954, 1945 to 1949 and 1932 to 1939 and Minister for Supplies from 1939 to 1945. He served as a Teachta Dála (TD) from 1924 to 1969.

## Infobox (officeholder)

- **name**: Seán Lemass
- **image**: Seán Lemass, 1966.jpg
- **caption**: Lemass in 1966
- **order**: 4th
- **office**: Taoiseach
- **president**: Éamon de Valera
- **1blankname**: Tánaiste
- **1namedata**: Seán MacEntee
Frank Aiken
- **term start**: 23 June 1959
- **term end**: 10 November 1966
- **predecessor**: Éamon de Valera
- **successor**: Jack Lynch
- **office1**: Leader of Fianna Fáil
- **term start1**: 23 June 1959
- **term end1**: 10 November 1966
- **predecessor1**: Éamon de Valera
- **successor1**: Jack Lynch
- **office2**: Tánaiste
- **taoiseach2**: Éamon de Valera
- **term start2**: 20 March 1957
- **term end2**: 23 June 1959
- **predecessor2**: William Norton
- **successor2**: Seán MacEntee
- **taoiseach3**: Éamon de Valera
- **term start3**: 13 June 1951
- **term end3**: 2 June 1954
- **predecessor3**: William Norton
- **successor3**: William Norton
- **taoiseach4**: Éamon de Valera
- **term start4**: 14 June 1945
- **term end4**: 18 February 1948
- **predecessor4**: Seán T. O'Kelly
- **successor4**: William Norton
- **office5**: Minister for Business, Enterprise and Innovation, Minister for Industry and Commerce
- **taoiseach5**: Éamon de Valera
- **term start5**: 20 March 1957
- **term end5**: 23 June 1959
- **predecessor5**: William Norton
- **successor5**: Jack Lynch
- **taoiseach6**: Éamon de Valera
- **term start6**: 13 June 1951
- **term end6**: 2 June 1954
- **predecessor6**: Thomas F. O'Higgins
- **successor6**: William Norton
- **taoiseach7**: Éamon de Valera
- **term start7**: 18 August 1941
- **term end7**: 18 February 1948
- **predecessor7**: Seán MacEntee
- **successor7**: Daniel Morrissey
- **taoiseach8**: Éamon de Valera
- **term start8**: 9 March 1932
- **term end8**: 16 September 1939
- **predecessor8**: Patrick McGilligan
- **successor8**: Seán MacEntee
- **office9**: Minister for Supplies
- **taoiseach9**: Éamon de Valera
- **term start9**: 8 September 1939
- **term end9**: 31 July 1945
- **predecessor9**: New office
- **successor9**: Office abolished
- **office10**: Teachta Dála
- **term start10**: 1948 Irish general election, February 1948
- **term end10**: 1969 Irish general election, June 1969
- **constituency10**: Dublin South-Central (Dáil constituency), Dublin South-Central
- **term start11**: List of Dáil by-elections, November 1924
- **term end11**: 1948 Irish general election, February 1948
- **constituency11**: Dublin South (Dáil constituency), Dublin South
- **birth name**: John Francis Lemass
- **birth place**: Ballybrack, Dublin, Ireland
- **death place**: Phibsborough, Dublin, Ireland
- **resting place**: Deansgrange, Dublin, Ireland
- **nationality**: Irish people, Irish
- **party**: Fianna Fáil
- **spouse**: Kathleen Lemass, Kathleen Hughes

- **children**: 4, including Maureen Haughey, Maureen and Noel Lemass, Noel
- **education**: O'Connell School
- **alma mater**: University College Cork