Biggar is a surname. Notable people with the surname include:
Alastair Biggar (1946–2016), Scottish international rugby union player
Alexander Biggar (disambiguation), multiple people
Ann-Maree Biggar (active from 1989), Australian television presenter
Billy Biggar (1874–1935), English footballer
Dan Biggar (born 1989), Welsh international rugby union player
Henry Percival Biggar (1872–1938), Canadian historian of New France
Herbert Biggar (1809–92), merchant, farmer and political figure in Canada West
James Lyons Biggar (1824–79), Ontario merchant and political figure
James Lyons Biggar (general) (1856–1922), Canadian soldier
John Walter Scott Biggar (1843–97), Ontario farmer and political figure
Joseph Biggar (Joe or J. G. Biggar, 1828–90), Irish politician
Murray Biggar, Canadian politician, mayor of Sudbury, Ontario in 1895
Oliver Mowat Biggar (1876–1948), Canadian lawyer and civil servant
Paula Biggar (active from 2007), Canadian politician
Robert Biggar (1761–1836), Ontario pioneer from Scotland who settled near Brantford
Sanford Dennis Biggar, mayor of Hamilton, Ontario 1905–06
William Hodgins Biggar (1852–1922), Ontario lawyer and political figure
