Eva Maria McLaren (1852-1921) was an English suffragist, writer and campaigner.
She was born Eva Maria Müller, the younger daughter of German businessman William Müller, and his English wife, Maria Henrietta (one of Eva's sisters, Henrietta Müller, was also a notable suffragist). She spent her early life in Valparaíso, Chile, before the family moved to London, living in Portland Place.
Her mother had progressive political views and introduced Eva to Octavia Hill for whom she collected rents and managed tenant welfare in Marylebone. She later trained as a nurse at Brownlow Hill infirmary in Liverpool. In 1881, she was a co-founder of Society for Promoting the Return of Women as Poor Law Guardians, a fore-runner of the Society for Promoting the Return of Women as County Councillors (1888) which eventually (1893) became the Women's Local Government Society.
On 18 April 1883 at the Meeting House in St. Martin's Lane, Westminster, she married politician Walter McLaren (1853–1912), whose mother, Priscilla Bright McLaren (1815–1906), was president of the Edinburgh National Society for Women's Suffrage. Walter McLaren also supported women's suffrage and the couple joined the Manchester Society for Women's Suffrage in 1884. In the 1886 General Election, Walter McLaren was elected as the Liberal Party MP for Crewe. As one of the few MPs supporting votes for women, he served as joint secretary of the all-party committee of the Parliamentary Supporters of the Women's Franchise Bill.