Beilby is a given name and surname. Notable people with the name include:
Given name Sir Beilby Alston (1868–1929), British diplomat Beilby Lawley, 2nd Baron Wenlock (1818–1880), British soldier and politician Beilby Lawley, 3rd Baron Wenlock (1849–1912), British soldier, politician, Governor of Madras Beilby Porteus or Porteous (1731–1809), successively Bishop of Chester and of London, an Anglican reformer Beilby Thompson (1742–1799), British landowner and politician
Surname George Thomas Beilby (1850–1924), British chemist The Beilby Medal and Prize, named after him Marcus Beilby (born 1951), Australian artist, realist painter and winner of 1987 Sulman Prize Ralph Beilby (1744–1817), English engraver working chiefly on silver and copper William Beilby (1740–1819), British glassworker who produced enamelled glass William Beilby (physician) (1783–1849), English-Scottish philanthropic physician