Vankoughnet is a surname. Notable people with the surname include:
Bill Vankoughnet (born 1943), Canadian politician Philip Michael Matthew Scott VanKoughnet (1822–1869), Canadian politician and judge Philip VanKoughnet (1790–1873), Canadian politician and businessman Gertrude Agnes VanKoughnet (c.1860–1940), Canadian socialite and second wife of Hugh John Macdonald