Oscar William Weber (17 October 1871 – 27 December 1946) was a Guyanese first-class cricketer. Weber was born at Georgetown in British Guiana. He made his debut in first-class cricket for Demerara against Barbados at Bay Pasture, Barbados in the 1891–92 Inter-Colonial Tournament. He made two further first-class appearances for Demerara in that seasons tournament. His next appearances in first-class cricket came for British Guiana, playing twice against Trinidad and Barbados in the 1895–96 Inter-Colonial Tournament. In September 1896, he played twice for British Guiana against Jamaica at Georgetown. In February 1897, he played for the West Indies against A. A. Priestley's XI, while in March of the same year he played for British Guiana against a Lord Hawke's XI; the following month, he play