Lauro Severiano Müller (8 November 1863 – 30 July 1926) was a Brazilian politician, diplomat, and military engineer.
Responsible for the transition of Santa Catarina from a province to a state, he is also recognised as one of those who helped achieve the Brazilian diplomatic victory over Bolivia through the Treaty of Petrópolis, which allowed for the purchase of Acre and its incorporation into Brazil.
Müller occupied the 34th chair of the Brazilian Academy of Letters from 1912 until his death in 1926.