Biggar is a surname of Scottish origin. People with the surname include:
Alastair Biggar (1946–2016), Scottish rugby union player
Alexander Biggar (disambiguation), multiple people
Ann-Maree Biggar (born 1967), Australian television presenter
Billy Biggar (1874–1935), English footballer
Dan Biggar (born 1989), Welsh rugby union player
Helen Biggar (1909–1953), Scottish sculptor and filmmaker
Henry Percival Biggar (1872–1938), Canadian historian
Herbert Biggar (1809–1892), Canadian merchant and politician
James Lyons Biggar (1824–1879), Canadian merchant and politician
James Lyons Biggar (1856–1922), Canadian soldier
John Biggar (Scottish politician) (1874–1943), Scottish politician
John Walter Scott Biggar (1843–1897), Canadian farmer and politician
Joseph Biggar (c. 1828–1890), Irish politician
Kyle Biggar (born 1986), Scottish biologist
Margaret Catherine Biggar Blaikie (1823–1915), Scottish temperance reformer
Mike Biggar (born 1949), Scottish rugby union player
Murray Biggar, Canadian politician
Nigel Biggar (born 1955), British theologian and priest
Oliver Mowat Biggar (1876–1948), Canadian lawyer and civil servant
Paula Biggar, Canadian politician
Sanford Dennis Biggar, Canadian politician
William Hodgins Biggar (1852–1922), Canadian lawyer and politician