Vladimir Germanovich Bogoraz, born Natan Mendelevich Bogoraz and used the literary pseudonym N. A. Tan, was a Russian revolutionary, writer and anthropologist, especially known for his studies of the Chukchi people in Siberia. In English, his name was often rendered as Waldemar Bogoras.

The Chukchi, or Chukchee, are a Siberian ethnic group native to the Chukchi Peninsula, the shores of the Chukchi Sea and the Bering Sea region of the Arctic Ocean all within modern Russia. They speak the Chukchi language. The Chukchi originated from the people living around the Okhotsk Sea.