Florence Nightingale Harrison Bell (1865 – October 1948) was a British socialist and suffragist activist.
Born in Newcastle-upon-Tyne as Florence Harrison, she worked as a cook before studying at Armstrong College and becoming a teacher. In 1896, she married Joseph Nicholas Bell, general secretary of the National Amalgamated Union of Labour. She became active in the Independent Labour Party (ILP), and was the first woman to serve on its National Administrative Council (NAC). In 1898, she was replaced on the NAC by Emmeline Pankhurst. Through the ILP, she became active in the Labour Representation Committee (LRC), and was the first secretary of the Newcastle LRC.
In 1902, Bell became a director of the Newcastle Co-operative Society. By 1907, she was working as an organiser for the Women's Trade Union League. She was also active in the suffrage movement, holding membership of the National Union of Women's Suffrage Societies and served as secretary of its local affiliate, the North East Society for Women's Suffrage. In 1909, she stood down from the position, and the following year she became secretary of the local branch of the Women's Labour League.
Bell was elected to the executive of the Women's Labour League in 1913. In 1918, she was elected to the Labour Party's National Executive Committee as part of a league slate. She lost her seat the following year, but served again later in the decade.