Margaret Dockrell (née Shannon; 18 March 1849 – 29 June 1926) was an Irish suffragist, philanthropist, and councillor.

She went on to become a director and member of the board of her husband's family company: Messrs Thomas Dockrell & Sons & Co. Ltd.[1] Dockrell was an active member of the committee of the Dublin Women's Suffrage and Local Government Association, later known as the Irish Women's Suffrage and Local Government Association (IWSLGA), founded in 1876 to promote women's suffrage by democratic methods.

The Irish Citizen listed her as a suitable woman candidate to run for the senate seat proposed by the Home rule bill in 1912.

Like many of her contemporaries, she believed that women were best placed to address issues around health, societal moral well-being, and housing.

Her granddaughter Marguerite Dockrell, Henry's daughter, also represented Ireland as a swimmer at the Amsterdam Olympics in 1928.