Octavia Hill (3 December 1838 – 13 August 1912) was an English social reformer, whose main concern was the welfare of the inhabitants of cities, especially London, in the second half of the nineteenth century. Born into a family of radical thinkers and reformers with a strong commitment to alleviating poverty, she herself grew up in straitened circumstances owing to the financial failure of her father's businesses. With no formal schooling, she worked from the age of 14 for the welfare of working people.