Chelmno Land or Culmland (Polish: Ziemia Chełmińska, German: Kulmerland, Kulmer Land, Culmerland or Culmer Land) is the traditional name for a district around the city of Chełmno, in north-western Poland.
In 10th century Chelmno Land (south of the Osa River) was inhabited by the lekhitic tribes of Kuyavians and Masovians.
In the Middle Ages Chelmno Land was a subject to constant raids of the pagan Prussians.