John Walter Scott Biggar (March 21, 1843 – ) was an Ontario farmer and political figure. He represented Bruce North in the Legislative Assembly of Ontario as a Conservative member from 1886 to 1890.
He was born in Woolwich, England, in 1843; his father and mother were born in Scotland. He was educated in Holland and London and later came to Saugeen Township, Canada West with his family in 1859. In 1873, he married Margaret Geddes. He served in the militia, travelling with Colonel Wolsely's Red River expedition in 1870, and later became lieutenant-colonel in the local militia.