Henri Charles Sellier (22 December 1883 – 24 November 1943) was a French administrator, urban planner and Socialist politician.

[2] He was a brilliant pupil, and won a state scholarship to study at the École des Hautes Études Commerciales (HEC Paris) business school, where he gained a diploma in 1901.

[3] In the summer of 1902 the HEC sent Sellier to work in the Siemens plant in Hamburg as secretary to Walther Rathenau, where he first met Albert Thomas.

[2] In 1925 the canton of Puteaux was divided, and Sellier was elected to represent the 2nd district, Suresnes and Nanterre-Sud, in the general council of the Seine.

[5] He aimed for a system in which efficient teams of specialists would regulate urban agglomérations to maximize the welfare and individual potential of the inhabitants.

[7] He saw the old administrative structure of Paris and its surrounding communes as an outdated obstacle to the healthy evolution of the overall urban area, in which unregulated capitalist expansion would inevitably cause social evils.

Over the years, Selliers views evolved from emphasizing local political responsibility to an approach based more on social sciences and cost-effectiveness.

[9] As soon as he took office as mayor of Suresnes in 1919 Sellier began to establish a system of social services with a special emphasis on the health of children.

One of his first steps was to restructure the colonie de vacances through which children from the city were given vacations of eight or more weeks with country families in the Nièvre.

[10] Sellier organized health protection from infancy, created institutions for education at all ages, built many public facilities and was innovative in providing housing that was comfortable and hygienic.

[3] During World War II (1939–45) Sellier refrained from voting on the constitutional change that gave full power to Marshal Philippe Pétain.