List of Famous people who died in 1903

Frederick Law Olmsted was an American landscape architect, journalist, social critic, and public administrator. He was the father of American landscape architecture. Olmsted was famous for co-designing many well-known urban parks with his senior partner Calvert Vaux. One of Olmsted's early works included designing the Walnut Hill Park in New Britain, Connecticut. His later efforts included Central Park and Prospect Park in New York City and Cadwalader Park in Trenton. He headed the pre-eminent landscape architecture and planning consultancy of late nineteenth-century America, which was carried on and expanded by his sons, Frederick Jr and John C, under the name Olmsted Brothers.

Henry Laurens Mitchell was an American lawyer, judge, and politician. He served as the 16th Governor of Florida (1893–1897).

Antonio Rotta was an Italian painter, mainly of genre subjects.

Georgi Nikolov Delchev, known as Gotse Delchev or Goce Delčev, was an important Macedonian Bulgarian revolutionary (komitadji), active in the Ottoman ruled Macedonia and Adrianople regions at the turn of the 20th century. He was the most prominent leader of what is known today as Internal Macedonian Revolutionary Organization (IMRO), a secret revolutionary society, active in Ottoman territories in the Balkans, at the end of the 19th and the beginning of the 20th century. Delchev was its representative in Sofia, the capital of Principality of Bulgaria. As such he was elected also a member of the Supreme Macedonian-Adrianople Committee (SMAC), participating in the work of its governing body. Though, he was killed in a battle with an Ottoman unit on the eve of the Ilinden-Preobrazhenie uprising.

František Josef Studnička was a Czech mathematician and popular pedagogue at Charles University in Prague. He was also an active contributor to astronomy and meteorology. He was known as the author of several textbooks and popular articles.

José Jiménez Aranda was a Spanish painter and brother of the painters Luis Jiménez Aranda and Manuel Jiménez Aranda.

Quintin Hogg was an English philanthropist, remembered primarily as a benefactor of the Royal Polytechnic institution at Regent Street, London, now the University of Westminster.

Prince Adam Stanisław Sapieha was a Polish nobleman, landlord, politician.