Jacob Laurentius Vidnes (5 November 1875 – 4 October 1940) was a Norwegian trade unionist, newspaper editor, politician for the Labour Party and civil servant. He was born in Vanylven as a son of farmer Knud Larsen Vidnes (1819–98) og Laurine Knudsdatter (1832–1910). In May 1929 he married hotelier's daughter Sigrid Birkeland (1900–1989), who after the death of Vidnes married Arne Ording.